Allen-Bradley 1771-OBN PLC-5 DC Output Module

Series#: AllenBradley

Product Details

1771-OBN ALLEN-BRADLEY – High-True DC Output Module for PLC-5 Systems, 10-30V DC, 32 Points
Delivers 32 discrete outputs with high-true logic (sourcing), ideal for industrial automation and machine control.
Accepts 10-30V DC field power, ensuring compatibility with a wide range of sensors and actuators.
Robust design with optical isolation and short-circuit protection per channel for reliable operation in harsh environments.
Directly interfaces with ALLEN-BRADLEY PLC-5 processors via the 1771 backplane, no additional adapters required.
Compact form factor saves panel space while supporting high-density output configurations.
100% Genuine and New, rigorously inspected before international dispatch.

Specification

The 1771-OBN ALLEN-BRADLEY is a high-true DC output module designed for the PLC-5 family of programmable controllers. This module provides 32 sourcing outputs operating at 10-30V DC, making it suitable for driving solenoids, motor starters, indicator lights, and other industrial loads. Each output channel is optically isolated from the backplane and features built-in short-circuit protection to prevent damage from field wiring faults. The module supports high-density configurations, allowing users to maximize I/O capacity within a single 1771 chassis. With its rugged construction and adherence to Allen-Bradley’s stringent quality standards, the 1771-OBN ensures long-term reliability in demanding manufacturing and process control environments. Below are the detailed technical specifications derived from the product’s engineering documentation.

Parameter	Specification
Product Type	DC Output Module
Series	1771 (PLC-5 Platform)
Model	1771-OBN
Number of Outputs	32
Output Logic	High-True (Sourcing)
Operating Voltage Range	10-30V DC
Output Current per Channel	0.5 A maximum (resistive load)
Total Output Current per Module	8 A maximum (all channels on)
Inrush Current Capability	2 A for 10 ms per channel
Output Type	Solid-state (FET)
Isolation Voltage	1500V AC (field to backplane)
Backplane Current Draw	5V DC: 400 mA typical
Field Power Supply Required	10-30V DC (user-supplied)
Protection Features	Short-circuit protection per channel, thermal shutdown
Indicators	LED per output for status (On/Off)
Wiring Termination	Removable terminal block (screw-type), 12-24 AWG
Operating Temperature	0°C to 60°C (32°F to 140°F)
Storage Temperature	-40°C to 85°C (-40°F to 185°F)
Relative Humidity	5% to 95% non-condensing
Vibration Resistance	5 g Standard Models 10-500 Hz (operating)
Shock Resistance	15 g peak (11 ms duration)
Module Location	Any slot in 1771 chassis (A or B series)
Weight	Approximately 0.45 kg (1.0 lb)
Certifications	UL listed, CSA certified, CE marked