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The 1769-OB32 is a high-density discrete output module designed for Allen-Bradley CompactLogix and MicroLogix 1500 systems. With 32 output points in a single 1769-series footprint, this module is ideal for applications that require high I/O counts within limited cabinet...
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The 1769-OB32 is a high-density discrete output module designed for Allen-Bradley CompactLogix and MicroLogix 1500 systems. With 32 output points in a single 1769-series footprint, this module is ideal for applications that require high I/O counts within limited cabinet space. It operates using sourcing logic, meaning it provides 24V DC power to connected field loads such as solenoids, motor starters, and indicator lights.
The 1769-OB32 is built for industrial reliability, featuring electronic fusing and optical isolation to protect the backplane from electrical noise and transient surges. The module is divided into two groups of 16 points, each with its own common, simplifying wiring and troubleshooting. It is perfect for automated assembly lines and complex machinery control.
| Specification | Details |
|---|---|
| Model Number | 1769-OB32 |
| Number of Outputs | 32 Points (2 groups of 16) |
| Output Type | Sourcing (24V DC Source) |
| Operating Voltage Range | 20.4V DC to 26.4V DC |
| Signal Delay (On to Off) | 1.0 ms maximum |
| Signal Delay (Off to On) | 0.1 ms maximum |
| Current Draw @ 5.1V | 300 mA |
| Continuous Current per Point | 0.5 A @ 30°C (derated to 0.25 A @ 60°C) |
| Continuous Current per Module | 8.0 A @ 30°C (derated to 4.0 A @ 60°C) |
| Surge Current | 2.0 A per point (repeatable every 2 seconds for 10 ms) |
| Isolation Voltage | 75V (continuous), Reinforced Insulation Type |
| Module Width | 1.5-Slot width (Standard 1769 Compact I/O) |
| Status Indicators | 32 Green LEDs for individual channel status |
| Weight | 0.28 kg |
| Operating Temperature | 0°C to 60°C |
The 1769-OB32 is commonly used in high-density control panels in industries such as material handling, food and beverage processing, and packaging systems. Its 32-point density reduces the number of I/O banks and expansion cables, leading to reduced hardware costs and installation time in large-scale automation projects.
What is the difference between Sourcing (OB) and Sinking (OV) modules?
The 1769-OB32 is a Sourcing module, meaning it switches the positive side (+24V) of the circuit to the load. In contrast, a Sinking module (OV) switches the negative side (0V/Common). Ensure your field devices are wired to the common to complete the circuit with this module.
Does this module require a high-density terminal block?
Yes, the 1769-OB32 uses a high-density 40-pin terminal block. It is often paired with the 1492-series pre-wired cables and interface modules (IFMs) to simplify wiring for all 32 individual points.
Can I use this module to drive high-current motors directly?
No, the 1769-OB32 is rated for 0.5A per point. It is designed for small loads like solenoids or pilot lights. For higher current loads, the module should be used to trigger an interposing relay.
