A-B 1734-OB4 Digital Output Module

Allen-Bradley 1734-OB4 Digital Output Module (POINT I/O)

 

 

The Allen-Bradley 1734-OB4 is a POINT I/O 24V DC digital output module used in distributed control systems. It provides 4 sourcing transistor outputs for switching industrial field devices such as solenoids, relays, indicator lamps, and small loads.

It is part of the 1734 POINT I/O system, and must be used together with an adapter (such as 1734-AENTR) and a terminal base.

Key Specifications

• Model: 1734-OB4
• Brand: Allen-Bradley (Rockwell Automation)
• Series: POINT I/O (1734)
• Product Type: Digital Output Module
• Output Channels: 4 points
• Output Type:
  • 24V DC sourcing (transistor outputs)
• Load Rating:
  • ~1.0 A per channel (typical)
  • 3.0 A max per module
• Supply Voltage:
  • 24V DC field power
• Mounting:
  • DIN rail with 1734-TB / 1734-TBS base
• Isolation:
  • Channel group isolation (not per-channel isolation)

What it does (simple explanation)

This module acts like a 4-channel electronic switch:

PLC (ControlLogix / CompactLogix)
↓
1734-AENTR adapter
↓
1734-OB4 output module
↓
Field devices:

• Solenoid valves
• Relays / contactors
• Stack lights
• Buzzers / alarms

So it simply turns devices ON / OFF under PLC control.

Features

• 4 fast-switching 24V DC outputs
• LED indicators for each channel status
• Electronic protection against overload/short circuit
• Compact modular design (POINT I/O system)
• Hot-swap capability (when properly configured)
• Easy integration with ControlLogix / CompactLogix PLCs via EtherNet/IP