ControlLogix 16-Point Isolated DC Output | Allen Bradley 1756-OB16I

Allen Bradley 1756-OB16I ControlLogix 16-Point Individually Isolated DC Output Module

Product Overview

The 1756-OB16I (Part Number: 1756-OB16I) is a specialized digital output module within the Rockwell Automation ControlLogix I/O platform. Distinguished by its "Individually Isolated" architecture, this module provides 16 output channels where each point is electrically separated from the others. This design allows for the switching of multiple DC voltages and sources on a single module without common-bus interference.

Engineered for high-reliability environments, the 1756-OB16I supports both sink and source configurations within its 10–30V DC operating range. It is an essential component for complex industrial systems requiring diverse voltage potentials, such as distributed power systems, interposing relay panels, and multi-zone process control.

Detailed Technical Specifications

The 1756-OB16I offers high-performance switching with a focus on electrical isolation.

• Manufacturer: Allen-Bradley / Rockwell Automation

• Model/Part Number: 1756-OB16I

• Module Type: Digital DC Output (Individually Isolated)

• Number of Outputs: 16 Channels

• Nominal Voltage: 12/24V DC

• Operating Voltage Range: 10–30V DC

• Output Configuration: Sink or Source (Individually selectable per point)

• Current per Point: 2 A @ 30 °C (86 °F); 1 A @ 60 °C (140 °F)

• Current per Module: 8 A @ 30 °C (86 °F); 4 A @ 60 °C (140 °F)

• Surge Current: 4 A for 10 ms (repeatable every 2 s)

• Output Delay Time (OFF to ON): 1 ms maximum

• Output Delay Time (ON to OFF): 2 ms maximum

• Backplane Current (5.1V DC): 350 mA

• Backplane Current (24V DC): 3 mA

• Power Dissipation (Max): 3.6 Watts @ 60 °C

• Isolation Voltage: 50V Continuous (Basic Insulation between points)

• Removable Terminal Block (RTB): 1756-TBCH, 1756-TBS6H (sold separately)

• Enclosure: Open-Style (Mounts in ControlLogix Chassis)