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1746-OB32E

Allen-Bradley 1746-OB32E 32-Channel Output Module 190mA

Only 5 units left

  • Manufacturer: Allen-Bradley

  • Product No.: 1746-OB32E

  • Product Type: Digital I/O Module

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 450g

  • Shipping port: Xiamen

  • Warranty: 12 months

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Description

Allen-Bradley 1746-OB32E SLC 500 Digital DC Output Module

The Allen-Bradley 1746-OB32E is an SLC 500 digital DC output module featuring 32 electronically protected output channels. Operating from 10-30 V DC (nominal 24 V DC), each output delivers 0.5 A (0.25 A when all 32 outputs active). With 190 mA backplane current at 5 V DC and electronic short circuit/overload protection, this module provides reliable high-current output control. Weighing approximately 0.45 kg (1.0 lbs), it operates from -13°F to 140°F.

Technical Specifications

Parameter Value
Manufacturer Rockwell Automation
Brand Allen-Bradley
Part Number 1746-OB32E
Series SLC 500
Module Type Digital DC Output Module
Outputs 32 (Two groups of 16)
Voltage Range 10-30 V DC (Nominal 24 V DC)
Current per Output 0.5 A (0.25 A all 32 active)
Current per Module 8 A maximum
Points per Common 16
Backplane Current 190 mA @ 5 V DC
Signal Delay (ON) 0.1 ms
Signal Delay (OFF) 1.0 ms
Step Response (In/Out) 60 ms / 2.5 ms
Electronic Protection Short Circuit & Overload (Auto-reset)
Operating Temperature -13°F to 140°F (-25°C to 60°C)
Storage Temperature -40°F to 185°F (-40°C to 85°C)
Humidity 5-95% non-condensing
Vibration (Operating) 2.5G @ 57-2000 Hz
Shock (Operating) 30G
Weight Approx. 0.45 kg (1.0 lbs)

Model Number Breakdown

  • 1746 – SLC 500 I/O Series
  • O – Output Module
  • B – DC Voltage (24 VDC)
  • 32 – 32 Output Channels
  • E – Electronically Protected

Installation & Field Application Guide

  • Install in any available slot of the SLC 500 chassis. Ensure the power supply supports the 190 mA backplane draw.
  • Wire field devices to the 32 output terminals. Use 14 AWG (2 mm²) cables with self-lifting lift plate terminals.
  • Route input power to the module using a separate path from I/O device cables to reduce noise.
  • External fusing is recommended despite electronic protection. The module auto-resets after overload; consider this for safe operation.

Why Choose the 1746-OB32E

  • 32 outputs in a single SLC 500 module for high-density DC output control.
  • Electronic short circuit and overload protection with auto-reset after fault clearance.
  • 0.1 ms ON delay and 1.0 ms OFF delay for fast response applications.
  • Individual fault detection per channel ensures unaffected outputs continue operation.

Field Engineer FAQs

Q1: What is the difference between 1746-OB32 and 1746-OB32E?

A1: The 1746-OB32E includes integral electronic protection against short circuits and overloads, while the standard OB32 does not.

Q2: What happens when an output overload is detected?

A2: The affected channel limits current output within milliseconds. The module auto-resets when the overload is cleared and resumes previous command state.

Q3: Does the electronic protection replace external fusing?

A3: No. The electronic protection is not equivalent to an external fuse. External protection devices are still recommended.

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  • Ensure compatibility with your current machinery or control systems.
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  • Follow manufacturer instructions and best practices during installation.

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