Year: 2026

Description

The Allen‑Bradley 2080‑MEMBAK‑RTC is a specialized plug‑in module from Rockwell Automation’s Bulletin 2080 Micro800™ controller family, designed to provide both non‑volatile memory backup and a high‑accuracy real‑time clock (RTC) for industrial control applications. This compact accessory snaps directly into the controller’s side slot, delivering reliable data retention during power outages and enabling precise time‑stamping for event logging, scheduled operations, and process automation tasks.

Application Scenarios

Imagine a water treatment facility where pumps must activate at precise intervals based on time‑of‑use tariffs, or a food processing line requiring accurate batch timestamps for traceability audits. When a momentary power flicker occurs, a standard PLC without RTC backup loses its internal clock, causing log errors and missed schedules. The 2080‑MEMBAK‑RTC eliminates this risk by maintaining continuous timekeeping with a long‑life internal battery while also preserving the user program and critical data on its 1MB non‑volatile memory. For OEM machine builders, this module enables simple field upgrades—operators can clone or update application code across multiple Micro830 and Micro850 controllers using the module without needing a laptop connection.

Parameters

Technical Principles and Innovative Values

Innovation Point 1: Integrated Memory Backup and High‑Accuracy RTC in One Module

The 2080‑MEMBAK‑RTC combines two critical functions into a single plug‑in accessory: non‑volatile project storage and precision timekeeping. This eliminates the need for separate RTC battery modules or external SD card solutions, reducing cost and panel complexity. The module stores a complete backup copy of the controller’s user program, data logs, and recipes, enabling rapid recovery after controller replacement or program corruption.

Innovation Point 2: RIUP Support for Zero‑Downtime Maintenance

The module supports Removal and Insertion Under Power (RIUP) in non‑hazardous locations, allowing technicians to replace or install the 2080‑MEMBAK‑RTC without shutting down the control system. This feature dramatically reduces maintenance downtime and is particularly valuable for continuous process applications where unplanned stoppages are costly.

Innovation Point 3: Temperature Hardened for Industrial Environments

With a wide operating range of –20°C to 65°C and storage capability down to –40°C, the 2080‑MEMBAK‑RTC delivers reliable performance in harsh environments including cold storage facilities, outdoor kiosks, and high‑temperature manufacturing zones. The T4 North American temperature code rating confirms its suitability for hazardous location installations.

Innovation Point 4: Seamless Integration Without Footprint Increase

Unlike add‑on memory cards that require external readers or cabled adapters, the 2080‑MEMBAK‑RTC plugs directly into a dedicated slot on the controller side, maintaining the compact panel footprint of the Micro800 system. The M3 securing screw ensures vibration‑resistant retention in high‑shock environments.

Description

The Rosemount 2051CG3A02A1AH2B2M5D4 is a high-performance gage pressure transmitter from Emerson’s Rosemount brand, part of the industry-leading 2051C Coplanar platform. This field instrument is designed to convert process pressure readings into standardized 4-20 mA analog signals with superimposed HART digital communication, providing both real-time control values and diagnostic data to DCS, PLC, or handheld communicators . The complete model code precisely defines its configuration: “CG3A” indicates gage pressure measurement with a 0-689 kPa (0-100 psi) range, “02A1” specifies the 316L stainless steel Coplanar flange and isolating diaphragm with silicone fill fluid, “AH2B2” describes the aluminum housing with 1/2-14 NPT conduit entry and carbon steel mounting bracket, while “M5” adds a local LCD display and “D4” provides FM explosion-proof, intrinsic safety, and dust-ignition-proof certifications for hazardous area deployment .

Unlike common modular communication devices, the Rosemount 2051CG3A02A1AH2B2M5D4 is a complete field instrument that integrates the pressure sensor, electronics, and communication capabilities into a single, field-mountable assembly. Its Coplanar technology positions the sensor and electronics on the same plane, allowing direct mounting to manifolds or flanges without the need for extensive impulse piping, which reduces potential leak paths and installation complexity . The built-in HART protocol support transforms this transmitter from a simple sensing element into an intelligent field device capable of remote configuration, diagnostics, and predictive maintenance data delivery.

Application Scenarios

Consider a chemical plant in the Texas Gulf Coast region where a process reactor requires precise pressure monitoring to maintain optimal reaction conditions. The existing pressure measurement system suffered from frequent drift and required monthly manual recalibration, leading to production interruptions and increased maintenance costs. After replacing the aging instrument with the Rosemount 2051CG3A02A1AH2B2M5D4, operators immediately noticed the difference. The 0.05% accuracy and 100:1 turndown ratio allowed the same transmitter to handle both normal operating pressures and temporary process upsets without requiring range changes . The HART digital communication enabled engineers to remotely monitor the transmitter’s health status from the control room, identifying a developing issue with the impulse line before it could affect production quality. The maintenance team reported that the LCD display on the Rosemount 2051CG3A02A1AH2B2M5D4 allowed operators to verify readings locally during routine rounds, eliminating the need to carry a handheld communicator for basic checks .

In another instance, a municipal water treatment facility was upgrading its filtration system and needed reliable pressure monitoring for backwash cycles. The distributed nature of the plant meant that instruments were scattered across a large outdoor area, exposed to temperature extremes and moisture. The rugged aluminum housing with IP20 protection and wide operating temperature range of the Rosemount 2051CG3A02A1AH2B2M5D4 ensured consistent performance despite the challenging environment. The FM explosion-proof certification (D4) gave the plant engineers confidence in deploying the Rosemount 2051CG3A02A1AH2B2M5D4 in areas where methane gas from the wastewater treatment process could accumulate . The 5-year stability specification of ±0.125% URL meant that the plant could extend its calibration intervals, reducing maintenance labor costs and minimizing process interruptions.

Parameter

Technical Principles and Innovative Values

Innovation Point 1: Coplanar Platform Architecture: The Rosemount 2051CG3A02A1AH2B2M5D4 leverages Emerson’s patented Coplanar technology, which integrates the pressure sensor and electronics on a single planar surface. This design eliminates the need for traditional impulse piping between the process connection and the transmitter, significantly reducing potential leak points and installation costs. Unlike conventional transmitters that require complex manifold assemblies, the Coplanar design of the Rosemount 2051CG3A02A1AH2B2M5D4 allows direct mounting to Rosemount 305 integral manifolds, simplifying field installation and maintenance .

Innovation Point 2: Advanced HART Communication Integration: The Rosemount 2051CG3A02A1AH2B2M5D4 incorporates a fully integrated HART modem that enables simultaneous analog and digital communication over the same two-wire loop . This allows the transmitter to transmit the primary process variable as a 4-20 mA signal while providing access to secondary variables (such as sensor temperature), diagnostic data, and configuration parameters. Maintenance technicians can remotely adjust the range, perform loop tests, and review the transmitter’s health without physical access to the device, dramatically reducing the time and safety risks associated with field interventions.

Innovation Point 3: 100:1 Turndown Ratio with High Accuracy: The sensor technology used in the Rosemount 2051CG3A02A1AH2B2M5D4 achieves a remarkable 100:1 turndown ratio while maintaining ±0.05% reference accuracy . This means that the same transmitter can be calibrated for a full-scale range of 689 kPa (100 psi) and still deliver accurate measurements when the actual process pressure is only 6.89 kPa (1 psi). For end users, this translates to significant inventory reduction, as a single Rosemount 2051CG3A02A1AH2B2M5D4 model can replace multiple dedicated-range transmitters, and process changes can be accommodated with a simple remote reconfiguration rather than a physical instrument swap.

Description

The 2080-LCD​ is a clip-on LCD display with integrated keypad, part of the Allen-Bradley Micro800 accessory family from Rockwell Automation. Designed specifically to mount directly onto the front of a Micro810 or Micro820 controller, this 2-line × 16-character module provides a low-cost local operator interface—viewing controller status, forcing I/O, editing timer/counter presets, and navigating user-defined screens—without a laptop, without a panel cutout, and without separate 24 V wiring. It is the entry-level HMI choice for machine builders and OEMs where a full PanelView would blow the BOM but “no local interface at all” isn’t acceptable to the end customer.

Application Scenarios

A Midwest grain-handling OEM builds portable auger control skids sold to family-owned elevators—each skid runs a 2080-MICRO810-SE48T (24 I/O embedded, relay outputs) controlling forward/reverse, purge timer, and high-level float. Originally the BOM had zero local interface; any setting change (purge duration, jog time) required the elevator electrician to plug in a laptop with CCW, which 80% of them didn’t have licensed. The OEM added the 2080-LCD​ to the BOM—clips onto the Micro810, no extra cutout in the NEMA 4X enclosure door, powered off the CPU’s front port. Using CCW’s LCD Screen Editor, the OEM defined four screens: Status(float states + motor run), Setpoints(purge timer 0–60 s, jog time 0–10 s, editable via the keypad), Faults(last 5 fault codes with timestamp), and I/O Force(for commissioning). The result: elevator operators could tweak purge time for dusty conditions without a service call, and the OEM cut post-install truck rolls by ~30%. “It’s sixty bucks that makes the machine feel finished,” the lead designer noted. That’s the 2080-LCD​ niche—it doesn’t replace a PanelView 800; it replaces nothingbeing there at all.

Parameter

Technical Principles and Innovative Values

Innovation Point 1: Zero-Wiring Clip-On Architecture. The 2080-LCD​ doesn’t consume a communications port, doesn’t need a 24 V feed, and doesn’t require a panel cutout. It physically latches onto the Micro810/Micro820 front bezel and draws power + data over the CPU’s front expansion header. In a compact enclosure (think 10″×10″×4″ NEMA 4 pump skid), saving one cutout and one 24 V pair matters—especially when the alternative is a $400 PanelView 800 + cutout + cable.Innovation Point 2: CCW LCD Screen Editor — No HMI Software License. Screens for the 2080-LCD​ are built inside Connected Components Workbench (CCW), the same free-tier software used to program the Micro810 itself. Up to 8 screens, each with navigable fields tied to controller tags (timer presets, counter values, bit force, string display). No FactoryTalk license, no ME project—just a tab in CCW. For OEMs shipping 200 skids/year, that license avoidance compounds.Innovation Point 3: Forced I/O and Fault Viewing at the Keypad. Even without custom screens, the 2080-LCD​ defaults to a system menu that lets the operator view all embedded I/O states, force individual outputs (with password if configured), and scroll through the controller’s fault queue. On a Micro810 with only 48 I/O, this covers 90% of what a service tech needs at 6 a.m. without booting CCW.Innovation Point 4: Micro810 + Micro820 Coverage. The 2080-LCD​ is one SKU serving two CPUs. Micro810 is the relay-out relay-in entry (no expansion bus), Micro820 adds embedded Ethernet and microSD—but both share the same front profile and LCD clip. Stock one spare for both SKUs on the truck.

Application Cases and Industry Value

A municipal parks-department irrigation pump house had three 5 HP booster pumps on a Micro810 (2080-MICRO810-SE48T) with no HMI—settings lived in the CCW project, and the city electrician only visited quarterly. After a pressure-transmitter drift caused one pump to short-cycle (3-minute on/off) for two weeks before anyone noticed, the department spec’d the 2080-LCD​ on all three houses. The OEM programmed two screens: Live(suction psi, discharge psi, pump runtime hrs) and Adjust(start/stop delta-psi, min-off timer). The on-site groundskeeper—not an electrician—could now see “Pump 2 cycling fast” on the 2080-LCD, check the delta-psi setting, and nudge it up 2 psi without a laptop or a work order. The short-cycling stopped, and the department estimated ~$1,100/year saved in pump contactor wear across the three houses. The 2080-LCD​ here acted as a “translator” between a $300 CPU and a non-technical operator—exactly the gap it was built to fill.

Application Scenarios

In a packaging OEM facility, engineers needed a compact controller to manage a wrapping machine with 24 sensors and 20 actuators—including solenoids, conveyors, and cutters. The Allen‑Bradley 2080‑LC30‑48QWB was selected for its 28 inputs and 20 relay outputs, which matched the I/O count precisely without requiring expansion modules. The controller’s 2 high‑speed counters (100 kHz) were configured to capture encoder pulses for accurate film length measurement, while the relay outputs directly drove solenoid valves and motor contactors. The result was a 30% reduction in panel space compared to modular PLC systems, and simplified wiring with fixed terminal blocks that eliminated the need for separate I/O modules.

The 2080‑LC30‑48QWB excels in applications where cost‑effectiveness and simplicity are paramount—from packaging machinery and conveyor systems to material handling equipment and small assembly lines. Its 20KB program memory provides ample capacity for moderate‑complexity logic, and the Class I Division 2 hazardous location certification expands its use into environments where flammable gases may be present .

Parameters

Technical Principles and Innovative Values

Innovation Point 1: Flexible Sink/Source Input Configuration
The 2080‑LC30‑48QWB supports both sinking and sourcing input configurations, allowing connection to a wide variety of field sensors without requiring external interface circuits . This flexibility reduces engineering effort and component count, particularly valuable in retrofit applications where sensor types may vary.

Innovation Point 2: High‑Speed Counter and PTO Integration
With 2 built‑in 100 kHz high‑speed counters, the 2080‑LC30‑48QWB can capture rapid pulse trains from encoders and flow meters without external counting modules. Additionally, the 2 axes of Pulse Train Output (PTO) enable basic stepper motor control, providing a cost‑effective solution for simple positioning and speed control tasks .

Innovation Point 3: 5 Plug‑in Module Slots for Scalability
The 2080‑LC30‑48QWB accommodates up to five 2080‑series plug‑in modules, allowing system expansion with analog inputs/outputs, RTD/thermocouple modules, or additional communication ports . This modular architecture enables the controller to grow with application requirements, extending its useful lifecycle and reducing the need for a complete controller replacement.

Innovation Point 4: Built‑in Communication and Programming Ports
The integrated USB 2.0 port and combo RS‑232/RS‑485 serial port provide convenient connectivity for programming, commissioning, and communication with Modbus devices . The USB port enables rapid program download and online debugging using Connected Components Workbench (CCW) software, significantly reducing development time compared to legacy serial‑only programming interfaces.

Innovation Point 5: Hazardous Location Certification
The 2080‑LC30‑48QWB carries Class I Division 2 Groups A, B, C, D approval, allowing installation in environments where flammable gases or vapors may be present during abnormal conditions . This certification expands deployment options in chemical processing, oil and gas, and other hazardous areas without requiring expensive explosion‑proof enclosures.

Description

The 2080-LC20-20QBBK​ is a Bulletin 2080 Micro820 programmable logic controller manufactured by Allen-Bradley (Rockwell Automation), representing the smallest and most cost-sensitive entry in the Micro800 family. It packs 20 I/O (12 × 24V DC sinking/sourcing inputs + 8 × relay outputs) into a 12–13 mm DIN-footprint, adds a 10/100 Mbps Ethernet/IP port, a USB programming port, and a MicroSD slot for data logging and program clone—all while retaining the Micro800 architecture’s C-language support and Arduino-style expansion shield compatibility. The “/K” suffix denotes the specific hardware/keying revision (Bulletin 2080 uses alpha suffixes for detail variants; the LC20-20QBB base is the 20-point relay version, and K tracks the current manufacturing rev). The 2080-LC20-20QBBK​ is positioned for small standalone machines, remote pump skids, and smart-RTU duty where a MicroLogix 1100 is overkill on price but a plain relay-only controller lacks networking.

Application Scenarios

At a rural lift-station cluster (5 sites, 3–8 km apart) for a county water district, the integrator needed a controller that could (a) switch three 120V 1-ph pump contactors via relay outputs, (b) read 12 DC inputs (float switches, E-stop, VFD fault contacts), (c) talk Ethernet/IP back to the SCADA headend over a narrowband radio Ethernet bridge, and (d) stay under 400 BOM per site. A MicroLogix 1100 (1763-L16AWA) was the legacy choice but at ~900+ and discontinuing, the OEM switched to 2080-LC20-20QBBK. The 8 relay outputs drove the pump contactors and a beacon/strobe directly—no interposing relays needed for the 120V coils, which the transistor-output Micro820 (2080-LC20-20QBB) couldn’t do. The Ethernet/IP port landed on the radio bridge’s Layer-2 without protocol gateway; the USB port let the district tech plug a laptop in the NEMA 4X cabinet without hunting for a 1761-CBL-PM02. The MicroSD (cheap 8 GB card) logged pump-cycle counts and runtime to CSV for the monthly O&M report. The pain point—”Micrologix 1100 EOL, 1769-L16AWA too expensive for a 3-pump skid”—closed at ~$380/site controller cost. Two years in, zero 2080-LC20-20QBBK​ failures across 5 sites; the district’s standard BOM now lists it as “preferred lift-station controller under 8 pumps.”

Parameter

Technical Principles and Innovative Values

• Innovation Point 1: Relay Outputs in the Only Ethernet/IP-Capable Micro820.​ The Micro820 family has two 20-point SKUs: 2080-LC20-20QBB (transistor DO, 24V DC only) and 2080-LC20-20QBBK​ (relay DO). The relay version is the one that lets you switch 120/240V AC contractor coils, solenoid valves, and beacon/strobe directly from the controller—no interposing relays, no 24V DC PSU for loads. For small OEM skids (packaging cell, fill station, pump house) where the loads are AC, the 2080-LC20-20QBBK​ is the only Micro800 that fits without expanding the BOM with a 1762-OW16 or external interpose.
• Innovation Point 2: Micro800 + C Language + Arduino Shield on a $300 PAC.​ The 2080-LC20-20QBBK​ is the entry Micro800 that still supports C-language routines (the smaller Micro810/Micro830 lose C; the Micro850/Micro870 regain it). The top-side Arduino-style shield header (2×7, 3.3/5V, I2C/SPI/UART) lets OEMs plug in custom sensor shields—WiFi, LoRa, specialty ADC—without a full custom PCB. For a small-machine builder, that means the 2080-LC20-20QBBK​ can host ladder for the I/O logic and C for a custom algorithm (e.g., a flow-metering Kalman filter) on the same $380 controller. Try that on a 1763-L16AWA and you’re rewriting in ST or buying a second device.
• Innovation Point 3: Ethernet/IP + RS-485 + USB in 12 mm Width.​ The embedded 10/100 Ethernet on the 2080-LC20-20QBBK​ speaks CIP explicit messaging (not implicit I/O, that’s Micro850+ territory), so it can be an Ethernet/IP adapter to a CompactLogix/ControlLogix for MSG instructions, or a client to a VFD via explicit. The RS-485 is non-isolated (watch the grounding on long runs) but handles Modbus RTU to a power meter or a second 2080-LC20-20QBBK​ in a daisy chain. USB Mini-B for CCW programming means no 1761-CBL-PM02 serial cable hunt—just a phone-style USB cable and you’re online. All three ports in a controller narrower than a paperback.

Application Cases and Industry Value

Case 1 – Craft Brewery Canning Line (OEM Small Machine).​ A 12-head canner OEM used the 2080-LC20-20QBBK​ as the cell controller for the lid-dropper + CO₂ purge station: 12 DI = lid-present prox, low-CO₂ pressure switch, E-stop string, guard switches; 8 relay DO = CO₂ purge solenoid (120V AC), lid-dropper vibratory bowl (120V), reject striker, beacon, stack-light. The Ethernet/IP port landed on the line’s main CompactLogix 1769-L33ER via CIP MSG—every 15 min the 2080-LC20-20QBBK​ pushed can-count and CO₂-psi-avg to the parent controller for OEE. The MicroSD logged CO₂ usage per shift to CSV; the brewery’s sustainability audit loved it. The OEM’s engineer: “We quoted a 1763-L16AWA first—$920, discontinued, and the customer wanted Ethernet to the line PLC. The 2080-LC20-20QBBK​ was $380, Ethernet native, relay outputs matched our 120V solenoids. CCW converted the ladder in a day.”Case 2 – Solar Farm Tracker Node (Renewable / RTU).​ A 50 MW tracker field used 2080-LC20-20QBBK​ at each row-controller cabinet: 12 DI read panel-stow limit switches, wind-anemometer dry contacts, local E-stop; 8 relay DO drive the tracker motor contactors (120V AC) and the stow-valve solenoids. The RS-485 daisy-chained 40 nodes back to a central SCADA gateway; the Ethernet/IP port on a subset of nodes served as a diagnostics tap via the embedded web server (you can pull up the 2080-LC20-20QBBK​ web page and see I/O status from a browser—no CCW needed). The MicroSD held 30 days of stow-event CSV for NERC compliance reporting. The EPC contractor noted: “We evaluated a 1769-L16BWA + 1769-IF4XOF2F combo at 3× the cost. The 2080-LC20-20QBBK​ did 12-in/8-relay for 1/3 the price and the RS-485 daisy chain was clean.”

Description

The 2080‑LC10‑12AWA is a 12‑point smart relay controller from Allen‑Bradley’s Micro810 series, part of the Micro800 programmable logic controller family. This compact controller combines the functionality of a micro PLC with the simplicity of a smart relay, featuring 8 AC inputs (120/240V AC) and 4 high‑current relay outputs.

Engineered for standalone machine control and small automation tasks, the 2080‑LC10‑12AWA offers high‑current relay outputs rated up to 8A, eliminating the need for external interposing relays in many applications. Its built‑in USB port and support for Connected Components Workbench software make programming straightforward, while an optional 1.5‑inch LCD module enables configuration and monitoring without a computer.

Application Scenarios

Consider a water treatment facility that needs to automate a small pumping station with temperature monitoring, compressor cycling, and pump controls. Previously, this required a complex combination of timers, relays, and thermostats—each requiring separate wiring and maintenance. The 2080‑LC10‑12AWA consolidates all these functions into a single compact unit: its 8 AC inputs directly accept signals from float switches, pressure sensors, and temperature switches, while the 4 relay outputs (two rated at 8A and two at 4A) can directly drive pump contactors and compressor starters. The controller’s embedded smart relay function blocks—including Delay OFF/ON Timer, Time of Day, Time of Week, and Time of Year—enable sophisticated scheduling and sequencing without custom programming, addressing the critical pain points of panel space constraints, wiring complexity, and maintenance overhead.

Parameters

Technical Principles and Innovative Values

Innovation Point 1: High‑Current Relay Outputs Eliminate External Relays
The 2080‑LC10‑12AWA features two relay outputs rated at 8A and two at 4A, significantly higher than typical micro PLC outputs. This allows the controller to directly drive small motors, contactors, and solenoids without intermediate relay panels, reducing component count, panel space, and total system cost by up to 30% in typical applications.

Innovation Point 2: Smart Relay Function Blocks for Rapid Configuration
The 2080‑LC10‑12AWA supports embedded smart relay function blocks—including Delay OFF/ON Timer, Time of Day, Time of Week, and Time of Year—which can be configured directly from an optional 1.5‑inch LCD module without any programming software. This bridges the gap between traditional smart relays and full PLCs, enabling simple logic tasks to be set up in minutes by technicians without programming expertise.

Innovation Point 3: Configurable Analog/Digital Inputs for Application Flexibility
The 2080‑LC10‑12AWA’s 8 inputs are structured as 4 dedicated digital inputs and 4 inputs configurable as either digital or analog (0‑10V DC), providing 10‑bit resolution. This flexibility allows the same controller to handle discrete sensors and analog signals from temperature or pressure transducers, eliminating the need for separate analog modules.

Innovation Point 4: Universal AC Power Supply and Hazardous Location Certification
With an AC input range spanning 85‑263V AC (47‑63 Hz), the 2080‑LC10‑12AWA operates on virtually any global power grid without configuration changes. Its Class I Division 2 hazardous location certification makes it suitable for use in potentially explosive environments such as chemical processing plants and oil and gas facilities, a capability rarely found in controllers at this price point.

Product Overview

The Allen-Bradley 2080-DNET20​ is a plug-in DeviceNet Scanner module purpose-built for Rockwell Automation’s Micro800 controller family (Micro820, Micro830, Micro850, Micro870; select Micro810 models excluded), occupying one of the controller’s front-face expansion bays to grant the compact Micro800 CPU native DeviceNet Master (Scanner) capability without consuming DIN-rail space or migrating to a larger CompactLogix/ControlLogix platform. While the Micro800 line (2080-LC50-24QBB, 2080-LC70-24QBB, etc.) ships standard with EtherNet/IP and/or RS-232/485 on the CPU itself, many legacy plant floors and OEM export machines still standardize on DeviceNet for drives and distributed I/O — PowerFlex 4/40/520/750 VFDs, 1734-ADN Point I/O blocks, 1732D ArmorBlock, and legacy smart devices. The 2080-DNET20​ bridges that gap: the Micro800 CPU remains the logic engine running CCW (Connected Components Workbench) programs, while the 2080-DNET20​ handles the DeviceNet MAC ID arbitration, poll scheduling, I/O slave messaging (poll command), and explicit message transport to/from up to 20 DN nodes on a single trunk.Physically, the 2080-DNET20​ is a 62 × 31.5 × 20 mm (35 g) plug-in that clicks behind the Micro800 CPU’s front cover, presenting a 5-pin removable terminal block for the DeviceNet bus (V+, V−, CAN_H, CAN_L, Shield) and drawing logic power from the CPU backplane (50 mA @ 24V DC) while sourcing its DeviceNet PHY current from the DN trunk (24V DC, 300 mA Class 2). Baud rates follow standard DeviceNet tiers — 125 kbps (420 m), 250 kbps (200 m), 500 kbps (75 m) — with the 2080-DNET20​ auto-negotiating or allowing software-select per CCW project. Two diagnostic LEDs (Module Status red/green, Network Status red/green) give at-a-glance health: solid green MS = module OK, solid green NS = DN ring healthy with at least one slave responding, flashing indicates I/O owner/scanning states, red flags fault. Lifecycle is Active​ (Rockwell current), origin Singapore, 1-year standard warranty, 5-day typical lead. For OEMs building small-to-mid machines on Micro800 that must drop onto a DeviceNet-backbone plant — automotive sub-cells, legacy packaging lines, batch skids tied to DN-central SCADA — the 2080-DNET20​ is the low-footprint, CCW-native DN scanner that avoids the cost and panel-space of a 1769-SDN + CompactLogix or 1756-DNB + ControlLogix uplift.

Technical Specifications

Main Features and Advantages

Front-Slot Plug-In, Zero DIN FootprintThe defining trait of the 2080-DNET20​ is that it lives in the Micro800 CPU’s front expansion bay — the same bay that might otherwise hold an analog plug-in (2080-IF2/OF2) or relay plug-in. No DIN clip, no right-side bus, no separate panel cutout: open the CPU’s front cover, click the 2080-DNET20​ in, land the 5-pin DN terminal, close the cover. For OEMs building compact machine panels where every 35 mm DIN rail millimeter is fought over, this keeps the DeviceNet scanner “inside the CPU” rather than consuming a separate module position. A Micro850 (2080-LC50-24QBB) with one 2080-DNET20​ + one analog plug-in + the right-side 2085 I/O expansion still fits in a 200 mm wide micro-panel.20-Node DN Master in the Micro800 Price TierDeviceNet scanners in the Rockwell catalog typically mean 1769-SDN (CompactLogix, ~900–1200) or 1756-DNB (ControlLogix, ~1300–1800) — both require stepping up to a larger CPU platform. The 2080-DNET20​ brings DN Master to the Micro800 tier (~$200–350 class plug-in), unlocking PowerFlex DN drives and 1734-ADN Point I/O for machines where a CompactLogix is overspecified. 20 nodes is ample for a small machine: 4× PowerFlex 523 DN (drive nodes), 2× 1734-ADN 8-point blocks (distributed I/O), a PanelView 800 DN HMI, and spare MAC IDs for future — all scanned by the 2080-DNET20​ under CCW’s DeviceNet Master configuration plugin.CCW-Native Configuration (No Studio 5000 Tax)The 2080-DNET20​ configures inside Connected Components Workbench, Rockwell’s free-to-light-use IDE for Micro800. CCW includes a DeviceNet Master plugin: you browse the DN trunk, auto-scan MAC IDs, EDS-load slave devices (PowerFlex, Point I/O, etc.), map I/O images into the Micro800 %I/%Q memory map, and set poll rates — all without launching Studio 5000 or owning a Logix license. For OEMs standardizing on Micro800 for cost, this is the differentiator: the 2080-DNET20​ + CCW = DN machine for <2k CPU+DN total, versus 8k+ for a CompactLogix 5370 + 1769-SDN + Studio 5000 seat.

Product Overview

The Allen-Bradley 1797-PS1E​ is the intrinsically safe (IS) power supply module at the heart of Rockwell Automation’s 1797 FLEX Ex remote I/O system—a platform purpose-built for process and hybrid industries where field I/O must live in Zone 1 / Zone 22 classified areas (ATEX/IECEx) while the control architecture remains standard ControlLogix or CompactLogix on the safe side. Unlike a conventional 24 V DC DIN-rail PSU, the 1797-PS1E​ is a certified energy-limiting device: it takes a wide-range 85–253 V AC mains feed (47–63 Hz, ~0.9 A @ 85 V, 55 W input power) and produces four galvanically isolatedintrinsically safe output channels, each capped at ≤ 9.5 V DC open-circuit voltage (U₀) and ≤ 1 A short-circuit current (I₀, IIC group), delivering 8.5 W per channel (34 W total). The four isolated loops mean a ground fault or short on one Flex Ex I/O segment doesn’t propagate to the others—a critical resilience property in offshore-platform and hydrocarbon-processing layouts where a single loop trip shouldn’t dark the whole rack.Physically, the 1797-PS1E​ lives in a flameproof (Ex d) cast enclosure with increased-safety (Ex e) terminal chambers, IP65-rated, 174 × 174 × 140 mm (H × W × D), ~6.9 kg module weight (7.7 kg packaged). Input cabling lands through an M20 × 1.5 gland (6–12 mm cable), output through M16 × 1.5 glands (4–8 mm), and the “E” suffix denotes metric-thread glands (the “N” sibling, 1797-PS1N, carries NPT threads for North American hazardous-area conduit). The module is mounted via its own foot-mount lugs (not DIN-rail in the conventional sense—this is a standalone Ex enclosure, not a rail-snapped card), and Rockwell has marked the 1797-PS1E​ discontinued since ~2017, but it remains heavily in-service across upstream oil & gas, petrochemical, pharmaceutical, and bulk-chemical sites that standardized on 1797 Flex Ex during the 2000s–2010s and are running “repair-not-replace” doctrines.System-role-wise, the 1797-PS1E​ feeds the 1797 Flex Ex I/O modules—1797-IB8 (8-point DI), 1797-OB8 (8-point DO), 1797-AI (analog in), 1797-RTD, 1797-AO—mounted in the same 1797 Ex d rack or distributed via IS field cable runs. The adapter module (1797-AEx variants) bridges the Flex Ex rack back to ControlNet, DeviceNet, or EtherNet/IP on the safe side, so the 1797-PS1E​ + 1797 I/O + 1797 adapter forms a complete Zone-1 I/O drop: field devices (pressure transmitters, solenoid valves, proximity switches) wire into the 1797 I/O in Zone 1, the 1797-PS1E​ powers them via IS-limited energy, and the adapter tunnels process data back to the control room over standard Rockwell networks. The value prop vs. traditional “Zener barrier panel in the safe area + Ex e field raceway” is compaction: the 1797-PS1E​ integrates the energy-limiting inside the same Ex d envelope that houses the I/O, eliminating a separate barrier cabinet and shrinking the safe-area footprint.

Technical Specifications

Main Features and Advantages

Four galvanically isolated IS output channels.​ The headline differentiator of the 1797-PS1E​ versus a standard PSU with a common 24 V bus is the quad-isolation architecture: each of the four output loops is transformer-isolated from the others and from the AC input, so a short or ground fault on loop 3 (say, a pressure-transmitter 4–20 mA circuit in a sour-gas knock-out skid) cannot drag down loop 1 (solenoid valves on the export pump) or loop 2 (temperature RTDs on the separator). For process units where “one loop down = one unit down” is unacceptable, the 1797-PS1E​ lets maintenance isolate and rectify a single IS segment without de-energizing the whole Flex Ex drop. This also simplifies loop-by-loop commissioning—land one segment, power it, validate, move to the next—without risking back-feed between channels.Integrated energy limiting eliminates external Zener barriers.​ A traditional IS install feeds a safe-area 24 V PSU, runs the 24 V into a Zener-barrier cabinet (one barrier per field device pair), and the barrier-limited energy then travels into Zone 1. The 1797-PS1E​ bakes the current-limiting (≤ 1 A I₀) and voltage-limiting (≤ 9.5 V U₀) circuits inside the same Ex d enclosure, certified to IEC 60079-11 intrinsic safety. The output of the 1797-PS1E​ isthe IS source—you land the field cable directly from the 1797 I/O (which is also Ex-rated) or from the 1797-PS1E​ output glands straight to the field IS devices, and the energy ceiling is enforced at the source. No separate barrier panel, no barrier wiring, no barrier spare-parts SKU. For revamps where the safe-area panel is space-constrained, this compaction is decisive.Wide-range 85–253 V AC input absorbs site-power variance.​ The 1797-PS1E​ accepts essentially the full global single-phase spectrum: 100 V Japan, 120 V NA, 208–240 V EU/UK, even 253 V upper tolerance. The 47–63 Hz window covers 50 Hz process-site mains and 60 Hz OEM-packaged kits. This means a single 1797-PS1E​ BOM line serves both a Norwegian North-Sea platform (230 V / 50 Hz) and a Gulf-Coast refinery utility (120 V / 60 Hz) without a buck/boost transformer. Input current peaks ~0.9 A at 85 V low-line, so the upstream feeder breaker (typically 2 A or 5 A in the safe-area panel) sizes easily.Ex d + IP65 field-rugged enclosure.​ The 1797-PS1E​ isn’t going in a clean DIN-rail panel—it’s either wall-mounted in a Zone 2/Zone 1 transition area or bolted inside a larger Ex d marshalling cabinet on the skid. The cast-flameproof housing contains an internal arc without transmitting ignition to the outside atmosphere, and the IP65 rating (dust-tight, hose-down resistant) means the module survives offshore salt spray, desertevaporation-pond chemical sheds, and wash-down pharma suites without an extra protective enclosure. M20 input / M16 output cable glands (metric—”E” suffix; “N” suffix swaps to NPT) give certified sealing paths; the 1797-PS1E​ must be installed with the correct gland torque and compound (if site spec calls for it) to preserve the IP65 + Ex d rating—this is not a “snap in and go” DIN module.Thermal and dissipation discipline.​ At 55 W input and 34 W delivered to the four IS outputs, the 1797-PS1E​ burns ~21 W as dissipation (71.67 BTU/hr). The Ex d cast housing acts as the heatsink—no fan, no vents (those would break IP65). In high-ambient sites (Middle East, boiler-deck, tropical offshore), the -20…+70 °C operating envelope gives headroom, but the 1797-PS1E​ should be mounted with clearance on all sides per the installation drawing (the 1797 Flex Ex system drawing calls out minimum spacing for convection) and not buried behind a solid panel blank. The 7.7 kg mass isn’t just ruggedness—it’s thermal mass that damps temperature spikes during transient overloads on one IS loop.

Technical Specifications

Main Features and Advantages

Galvanic Isolation for Intrinsically Safe Systems

The Allen‑Bradley 1797‑BIC provides galvanic isolation between the non‑intrinsically safe backplane bus and the intrinsically safe FLEX Ex backplane bus, effectively separating two sections of the I/O backplane while allowing IS and non‑IS field‑device wiring to coexist within the same I/O group . This isolation capability is fundamental for facilities requiring explosion protection, as the 1797‑BIC converts hazardous power to IS‑safe power to run the slave‑side bus receiver/transmitter circuitry and FLEX Ex backplane modules . The module’s galvanic isolation meets the stringent requirements of DIN EN 60079‑11, ensuring that a fault on the non‑IS side does not compromise the intrinsic safety of the field wiring connected to the FLEX Ex modules .

Flexible System Architecture with Mixed I/O Support

The 1797‑BIC enables a highly flexible and cost‑effective system architecture by allowing FLEX Ex modules and standard FLEX I/O modules to be configured on the same DIN rail, attached to the same adapter, and grouped together with appropriate sides of the bus isolator . This intermixed capability is a significant advantage for facilities with both hazardous and non‑hazardous areas, as a single 1797‑BIC can serve as the bridge between the two zones, eliminating the need for separate control systems or expensive intrinsic safety barriers for each field device. The module supports up to eight FLEX Ex modules on the slave side, providing substantial I/O capacity for hazardous area instrumentation .

Product Overview

The Allen-Bradley 1794-TB3​ is a 3-wire terminal base unit (TBU) within Rockwell Automation’s 1794 FLEX I/O platform, serving as the foundational wiring and backplane interface beneath any 1794-series I/O module (digital, analog, RTD/thermocouple, or specialty) and the companion 1794 communication adapter (1794-AENT for EtherNet/IP, 1794-ACN/R for ControlNet, 1794-ASB for Remote I/O). The 1794-TB3​ itself is not a functional I/O device—purchased alone it does nothing; it becomes active only when a 1794 module snaps onto its top face and a 1794 adapter (or a 1794-ADN DeviceNet adapter) closes the FLEXBUS backplane chain. What the 1794-TB3​ provides is the field-wiring interface: 52 total screw-clamp terminals organized into three distinct rows—16 I/O positions (0–15) for signal wiring, 18 common terminals (16–33), and 18 voltage-supply terminals (34–51)—so that each I/O point can have its own dedicated +V feed and COM return, a 3-wire architecture purpose-built for PNP sensors, NPN sinks, relay coils, and isolated analog loops where per-point power independence matters. The terminal clamps are Rockwell’s cage-clamp screw type (tighten screw to close the cage onto the stripped conductor), which delivers better vibration resistance than traditional screw-to-copper pressure terminals and handles 22–12 AWG (0.34–3.3 mm²) solid or stranded copper.Electrically, the 1794-TB3​ is rated for 125V AC/DC continuous across the field terminals (basic insulation type, field-to-FLEXBUS isolation 125V), with a 10A physical current ceiling per terminal strip—though the actual per-point current is capped by whatever 1794 module sits on top (typically ≤2A per I/O point for digital, far less for analog). The TBU draws 640 mA from the FLEXBUS 5V DC backplane (fed from the 1794 adapter’s 24V DC input), supplies daisy-chain 24V DC power across adjacent TB3 units via integrated power-bus bars and jumper fingers, and supports Removal and Insertion Under Power (RIUP) of the 1794 module above it—the module’s locking lever seats into the 1794-TB3‘s latch, and the FLEXBUS connector mated through the TBU’s printed-circuit backplane ensures the adapter sees the module without re-scanning the entire rack. Mounting is 35 mm DIN rail (EN 60715) or panel via screws, footprint 94 × 94 × 69 mm (3.7 × 3.7 × 2.7 in), operating 0°C to +55°C (IEC extended -20 to +70°C), 5g vibration / 30g shock, certified UL/cUL/CE/CSA/KC/GOST/maritime. For distributed I/O architectures—remote pump skids, MCC-mounted Flex banks, conveyor zone boxes—where field wiring needs to terminate locally and the 1794 module above may be swapped without disturbing the screw terminations, the 1794-TB3​ is the standard TBU; sister variants 1794-TB3S​ (spring-clamp, tool-free) and 1794-TB3K​ (conformal-coated for corrosive atmospheres) cover the same footprint with different terminal and environmental specs.

Technical Specifications

Main Features and Advantages

Three-row partitioned wiring that prevents mis-wiring:​ The standout differentiator of the 1794-TB3​ versus cheaper 2-wire TBU designs (or versus landing Flex I/O on a generic DIN terminal block strip) is the explicit 3-row partition: Row A = 16 I/O signal terminals (0–15), Row B = 18 COM returns (16–33), Row C = 18 +V feeds (34–51). In a PNP sensor loop—sensor brown to +V row, blue to COM row, black (signal) to I/O row—the 1794-TB3​ physically segregates power from signal so a harried electrician can’t accidentally land 24V+ onto an I/O point and fry the 1794-IB16 above it. For NPN or isolated analog (e.g., 1794-IE8, 4–20 mA with its own loop supply), the same partition lets each channel have a dedicated +V and COM tap from the daisy-chain bus, rather than gang-paralleling COM under one terminal. This 3-wire architecture is why the 1794-TB3​ is the default TBU for mixed-sensor Flex racks—one TBU footprint covers PNP, NPN, relay, and analog without re-planning the terminal block layout.Cage-clamp screw terminals with vibration resilience:​ Rockwell specifies the 1794-TB3​ terminals as cage-clamp screw type—you insert the stripped 22–12 AWG conductor into the cage, then tighten the screw to close the cage jaws onto the copper. This is mechanically superior to “screw-direct-to-wire” terminals (where the screw head bears on the conductor) because the cage distributes clamp force evenly and the screw thread doesn’t directly shear the strand bundle. On high-vibration skids—centrifugal pump packs, compressor sheds, vibrating conveyor drives—the 1794-TB3‘s cage clamps hold torque better over thermal cycles, which is why Rockwell rates the TBU at 5g vibration / 30g shock, matching the 1794 module envelope. Paired with the 0.56–0.79 N·m (5–7 lb·in) torque spec, the 1794-TB3​ gives a “torque-once, forget” field experience that traditional spring-clamp (TB3S) also delivers but with a different tooling feel—some panels standardize on TB3 (screw) for maintenance crews who prefer screwdriver familiarity, others on TB3S (spring) for faster wiring.