Allen-Bradley 1756-0B16I ControlLogix Discrete Output Module

The 1756-OB16I is a ControlLogix DC digital output module designed to operate at 12–24 VDC in either sinking or sourcing configuration. It features sixteen individually isolated outputs and is installed directly into a 1756 local or remote chassis.

Technical Specifications:

• Manufacturer: Rockwell Automation

• Brand: Allen-Bradley

• Part Number/Catalog No.: 1756-OB16I

• Series: ControlLogix

• Module Type: Isolated DC Output Module

• Outputs: 16-Point Individually Isolated

• Voltage: 12–24 VDC Sink-Source

• Operating Voltage Range: 10–30 VDC

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

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

• Current per Point: 2 A @ 30°C, 1 A @ 60°C (linear derating)

• Current per Module: 8 A @ 30°C, 4 A @ 60°C (linear derating)

• Maximum Output Current Rating – Point: 2 A @ 30°C, 1 A @ 60°C

• Maximum Output Current Rating – Module: 8 A @ 30°C, 4 A @ 60°C

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

• Backplane Current at 5 V: 350 mA

• Backplane Current at 24 V: 3 mA

• Removable Terminal Blocks: 1756-TBCH, 1756-TBS6H

• Isolation Voltage: 50 V continuous

• Enclosure: None

• UPC: 10612598164544

Overview:
The Allen-Bradley 1756-OB16I provides sixteen individually isolated DC output points for reliable control in ControlLogix systems. While it does not include internal protection, external interface modules (IFM) or fuses can safeguard outputs. The recommended fuse is a 5x20 mm, 4 A quick-acting fuse (SOC p/n MQ2-4A).

For signal termination, compatible remote terminal blocks include 1756-TBCH and 1756-TBS6H, both 36-pin units. These remote terminal blocks are required to complete connections.

Output channels on the 1756-OB16I feature a configurable safe-state position, which is activated when the controller is switched to Program mode or when a controller fault occurs. This ensures safe and predictable operation in industrial automation applications.