Allen-Bradley | 1756-OB16I ControlLogix 16 Point D/O Module

Overview

The Allen-Bradley 1756-OB16I is a high-performance ControlLogix isolated output module that is ideal for controlling discrete outputs in industrial automation systems. Designed for versatility, it operates in both sinking and sourcing configurations with a voltage range of 10-30V DC. This module offers 16 individually isolated outputs, allowing different voltage sources to be connected to each output point. It’s perfect for applications requiring reliable and isolated DC outputs for controlling various electrical loads.

Technical Specifications

• Brand: Allen-Bradley
• Manufacturer: Rockwell Automation
• Part Number/Catalog No.: 1756-OB16I
• Series: ControlLogix
• Module Type: Isolated DC Output Module
• Outputs: 16 Individually Isolated Channels
• Voltage: 12-24V DC, Sink-Source Configuration
• Operating Voltage Range: 10-30V DC
• Current per Point:
  • 2A at 30°C (86°F)
  • 1A at 60°C (140°F) (linear derating)
• Current per Module:
  • 8A at 30°C (86°F)
  • 4A at 60°C (140°F) (linear derating)
• Output Delay Time (OFF to ON): 1 ms max
• Output Delay Time (ON to OFF): 2 ms max
• Power Dissipation (Max): 3.6W at 60°C
• Operating Temperature Range: 0°C to 60°C
• Non-Operating Temperature Range: -40°C to 85°C
• Enclosure: None
• Terminal Block(s): 1756-TBCH, 1756-TBS6H (36 pins each)
• Surge Current (per point): 4A for 10ms, repeatable every 2s
• Backplane Current: 350mA at 5V, 3mA at 24V
• Isolation Voltage: 50V continuous (output-to-backplane); 250V (output-to-output)
• Fuse: 4A quick-acting, 5x20mm (SOC p/n MQ2-4A)
• Safe States: Configurable for each output channel in Run, Program, and Fault modes

FAQ

• Q1: What fuse is required for this module?
  The recommended fuse type is a 5x20mm 4A quick-acting fuse (SOC p/n MQ2-4A).
• Q2: What is the maximum current per point?
  The maximum current per point is 2A at 30°C and 1A at 60°C, with linear derating.
• Q3: How do I wire the outputs?
  The module supports both sinking and sourcing configurations, allowing you to connect each output channel to a different voltage source or follow a common non-isolated wiring scheme.

Check official datasheet for more detailed information: ControlLogix and GuardLogix Controllers