Description:The Allen‑Bradley 2080‑SERIALISOL/Y (often abbreviated as 2080‑SERIALISOL) is a plug‑in communication module that adds a single, 500V‑isolated RS‑232 / RS‑485 serial port to Micro800 series programmable logic controllers (PLCs). Unlike the non‑isolated ports built into Micro830/Micro850 CPUs, this module provides robust electrical isolation to protect the controller from ground loops, noise, and voltage transients commonly found in industrial environments. It supports multiple protocols—including Modbus RTU (Master or Slave), CIP Serial, and ASCII—making it ideal for connecting HMIs, drives, barcode scanners, or instrumentation.Application Scenarios:In a water treatment plant in Shanxi, a 2080‑SERIALISOL/Y module was installed on a Micro850 controller to communicate with a bank of ultrasonic level sensors via Modbus RTU over RS‑485. The 500V isolation prevented communication lock‑ups caused by ground potential differences between the sensors and the PLC cabinet. Technicians used the module’s DIP switch to set the physical layer to RS‑485 and configured it as a Modbus Master in Connected Components Workbench (CCW) to poll the sensors, enabling real‑time level monitoring without signal corruption.
Parameter:
| Parameter | Specification |
|---|---|
| Product Model | 2080‑SERIALISOL/Y (commonly referred to as 2080‑SERIALISOL) |
| Manufacturer | Allen‑Bradley (Rockwell Automation) |
| Product Type | Isolated Serial Port Plug‑In Module |
| Compatible PLCs | Micro800 Series (Micro810, 820, 830, 850, 870) |
| Interface | 1 port, selectable RS‑232 (Full Duplex) or RS‑485 (Half Duplex) |
| Isolation | 500V AC (between field side and PLC logic) |
| Protocols | Modbus RTU (Master/Slave), CIP Serial (DF1), ASCII |
| Baud Rate | 300 – 115,200 bps (software configurable) |
| Connector | 8‑pin removable screw terminal block |
| Wire Size | 0.14 – 1.5 mm² (26 – 16 AWG) |
| Terminal Torque | 0.22 – 0.25 N·m |
| Power Supply | 24V DC via Micro800 backplane (no external power required) |
| Operating Temp | -20°C to 65°C |
| Status LED | Green PWR (Power) indicator |
| Configuration | Connected Components Workbench (CCW) |
Technical Principles and Innovative Values:
- Innovation Point 1: Electrical Isolation for Noise Immunity. The primary innovation is the 500V AC isolation barrier between the field wiring and the PLC’s internal logic. This effectively blocks ground loops and common‑mode noise, which is critical when connecting to devices like VFDs or long‑distance RS‑485 networks where ground potential differences can corrupt data or damage ports.
- Innovation Point 2: Dual‑Interface Flexibility. A single module supports both RS‑232 (for point‑to‑point HMI connections) and RS‑485 (for multi‑drop networks with drives or meters). The physical layer is selected via a hardware DIP switch, while the protocol (Modbus, ASCII, etc.) is configured in software, providing broad compatibility without needing different hardware SKUs.
- Innovation Point 3: Plug‑In Form Factor. Unlike external serial adapters that require separate DIN rail space and wiring, the 2080‑SERIALISOL/Y plugs directly into the Micro800 controller’s front slot. This saves panel space, reduces external wiring, and simplifies the bill of materials.
