OVERVIEW

Official designation: Allen-Bradley 1791-OB32 (Block I/O, 32-Point DC Sourcing Output Module)

Role/Application: This 32-point output module provides 24V DC sourcing control for actuators and devices in a distributed Remote I/O control architecture.

KEY SPECS SUMMARY

Power: 19.2 to 30V DC, 300 mA max at 24V DC

Interfaces / Ports: Remote I/O link, removable terminal blocks

Indicators: 1 COMM, 1 STATUS, and 16 I/O Status LEDs

Operating Temp: 0 degrees C to plus 60 degrees C

Platform / Compatibility: PLC-2, PLC-3, PLC-5, and SLC 500 family controllers

Limit: 500 mA maximum current per output, 1V maximum voltage drop

Lifecycle: Discontinued/Obsolete

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the minimum on-state current required for each of the 32 output channels?

A: The minimum required on-state current for each of the 32 outputs is 1 milliampere.

Wiring & Installation:

Q: What are the physical dimensions of the 1791-OB32 module for panel mounting?

A: The module dimensions are 6.95H x 4.35W x 3.85D inches.

Troubleshooting & Compatibility:

Q: How long are the maximum signal delays when the outputs turn on and turn off?

A: The maximum signal delay is 0.5 milliseconds when turning on and 1.0 milliseconds when turning off.

Replacement & Upgrades:

Q: Does the 1791-OB32 module require external output fusing or is the fusing internal?

A: The original module documentation recommends using external fusing for the outputs.