Discrete Output Module Allen-Bradley 1756-OB8 ControlLogix 8-Point

Product Overview

The Allen-Bradley 1756-OB8 is a digital DC output module. It belongs to the ControlLogix series. This module provides eight outputs. It operates at 24VDC. Each point can handle 2 Amps. The module supports 10-30VDC range. It features two output groups. Each group has four channels. The module uses a removable terminal block. It is ideal for industrial control systems.

Application Scenarios

This module controls actuators and relays. It works well in factory automation. Use it for conveyor systems. It is suitable for packaging machines. The module handles motor starters. It also controls solenoids and valves. It fits into a ControlLogix chassis. It communicates over the backplane. The 1756-OB8 is a reliable choice for discrete control.

Technical Specifications

The module has 8 outputs. It uses 24VDC source voltage. The voltage range is 10-30VDC. Each point delivers 2 Amps at 60°C. The total module current is 8 Amps. The on-state delay is 1 ms max. The off-state delay is 2 ms max. It draws 165 mA from 5.1VDC backplane. It draws 2 mA from 24VDC backplane. The power dissipation is 2.5 Watts. The isolation voltage is 250V continuous. The operating temperature is 0 to 60°C.

Installation & Maintenance Guide

Install the module into a ControlLogix chassis. Use a 1756-TBNH or 1756-TBSH terminal block. Ensure power is off before wiring. Connect the 24VDC supply to the module. Wire each output to the load. Set fault mode per point. Options are Hold Last State, On, or Off. The default is Off. Set program mode similarly. Keep the module clean and dry. Check connections periodically for tightness.

Packing List

1x Allen-Bradley 1756-OB8 module. 1x Removable terminal block (sold separately). 1x Installation guide. The module ships in an anti-static bag. Shipping is via FedEx, UPS, or DHL. Contact us for expedited options.