Application Scenarios
An OEM building a compact conveyor sorting system needed to add control for eight 24V DC divertor solenoids but had limited panel space and a tight budget. The 1762‑OB8 was selected for its small footprint (40.4 mm width) and direct compatibility with the existing MicroLogix 1400 backplane . Its sourcing output configuration matched the customer’s existing wiring practices, eliminating the need for additional interposing relays. This streamlined the panel layout, reduced component count, and cut installation time by 20%, addressing the core challenges of cost, space, and electrical compatibility . The module’s fast response also ensured precise timing for package divert operations, reducing mis‑sorts and improving line throughput.
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1762‑OB8 |
| Manufacturer | Allen‑Bradley (Rockwell Automation) |
| Product Category | Digital Output Module (Expansion I/O) |
| Number of Outputs | 8 points, sourcing (PNP) |
| Output Type | Solid‑State (Transistor) |
| Rated Voltage | 24V DC (20.4 – 26.4V DC operating range) |
| Continuous Current per Point | 1.0 A @ 30°C; 0.5 A @ 55°C |
| Continuous Current per Module | 8.0 A @ 30°C; 4.0 A @ 55°C |
| Surge Current (per point) | 2.0 A for 10 ms (repeatable) |
| Switching Speed | On delay: 0.1 ms; Off delay: 1.0 ms (resistive load) |
| On‑State Voltage Drop | ≤ 1.0V DC |
| Off‑State Leakage Current | ≤ 1 mA |
| Bus Current Draw | 115 mA @ 5V DC (0.575 W) |
| Isolation | Optically isolated group to backplane (1200V AC / 1697V DC test) |
| Dimensions (H x W x D) | 90 mm x 40.4 mm x 87 mm |
| Weight | Approx. 210 g |
| Operating Temperature | -20°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Mounting | DIN Rail (35 mm) or panel mount |
| Certifications | c‑UL‑us Class I Div 2, CE, C‑Tick, KCC |
Technical Principles and Innovative Values
Innovation Point 1: Solid‑State Reliability for High‑Cycle Applications
Unlike mechanical relay modules, the 1762‑OB8 uses transistor switching with no moving parts, offering a virtually unlimited electrical life . This makes it ideal for applications requiring millions of operations per year—such as packaging indexing, pick‑and‑place machines, or rapid sorting systems—where relay contact wear would cause frequent unplanned downtime.
Innovation Point 2: High‑Speed Switching with Precise Timing
With an on‑delay of just 0.1 ms and off‑delay of 1.0 ms, the 1762‑OB8 provides jitter‑free control for time‑critical tasks . This speed is essential for applications requiring fast response to sensor inputs or coordinated motion control, delivering deterministic output timing that mechanical relays cannot match.
Innovation Point 3: Sourcing (PNP) Logic Simplification
The sourcing output design means the module supplies positive voltage to the load, which is intuitive for maintenance technicians and aligns with modern sensor and actuator wiring standards . This reduces wiring errors during installation or troubleshooting and eliminates the need for additional interposing hardware when connecting to PNP‑compatible devices.
Innovation Point 4: Compact Density with Full Diagnostics
Despite its small footprint—just 40.4 mm wide—the 1762‑OB8 integrates eight fully isolated outputs with per‑point LED status indication . Green LEDs for each channel provide instant visual verification of output state, while the module’s health indicator and error LEDs simplify troubleshooting without requiring a programming terminal .
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