Allen-Bradley 1771-OB DC Output Module 12-24V-DC

Allen-Bradley 1771-OB is an eight-channel DC output module for the 1771 I/O chassis, designed to energize DC loads from a 10–27 V DC supply (commonly 12–24 V). Each channel can source up to 1.5 A, with a module-wide maximum of 8 A, and supports up to 4 A surge per channel for 1 ms. The outputs present an on-state voltage drop up to 2 V and an off-state leakage current up to 1 mA at 25°C, with approximate 10 ms turn-on/turn-off delays, making it suitable for discrete control of relays, coils, and other DC devices within the specified voltage range. Internal power dissipation ranges from 0.9 W (min) to 16.9 W (max) across the module, and the unit is designed to be installed in standard Rockwell 1771 I/O racks for use with compatible PLC-5/SLC 500 control systems.