Allen-Bradley | 1771-OBD/C DC Output Module 16-Channel

Overview

The Allen-Bradley 1771-OBD/C is a 16-channel DC output module from the 1771 series, designed to drive DC-powered loads in PLC5 and similar control systems. It provides reliable performance for industrial applications, handling resistive loads with rapid response times and stable voltage control.

Technical Specifications

• Manufacturer: Allen-Bradley

• Model & Part Number: 1771-OBD/C

• Number of Outputs: 16

• Operating Voltage Range: 10–60 VDC

• Nominal Output Voltage: 48 VDC

• Output Current Rating (per channel): 2 A resistive

• Maximum Continuous Current (per module): 8 A

• Maximum Surge Current: 4 A per output (10 ms, repeatable every 2 s), 25 A per output (10 ms, repeatable every 2 s)

• Minimum Load Current: 2.5 mA

• On-State Voltage Drop: 1.5 V DC

• Off-State Leakage Current: 0.5 mA

• Power Dissipation: 15.6 W

• Thermal Dissipation: 53.3 BTU/hr

• Backplane Current: 400 mA

• Signal Delay (Off to On): 0.1 ms

• Signal Delay (On to Off): 0.2 ms

Applications

• Energizing DC loads in PLC5-based systems

• Controlling resistive devices requiring fast and precise output response

• Industrial automation applications needing high-density output channels

FAQ

Q: How many outputs does the 1771-OBD/C support?
A: The module provides 16 individual DC output channels.

Q: What voltage range is supported?
A: It operates reliably from 10 VDC to 60 VDC, with a nominal output of 48 VDC.

Q: Can it handle high surge currents?
A: Yes, the module supports surges up to 25 A per output for 10 ms, repeatable every 2 seconds.

Q: What is the response time of the outputs?
A: Signal transition delay is 0.1 ms from off to on, and 0.2 ms from on to off, suitable for rapid switching applications.