1771-OBD

Overview

The Allen-Bradley 1771-OBD is a 16-point DC output module designed for high-speed, reliable switching in 10–60 V DC control systems.

Electrical Ratings

• User Supply Voltage: 10–60 V DC

• Nominal Output Voltage: 48 V DC

• Current Rating: 2 A per output, 8 A per module

• Load Current Minimum: 2.5 mA

• Surge Current: 4 A for 10 ms, repeatable every 2 s

• On-State Voltage Drop: ≤ 1.5 V DC

• Off-State Leakage Current: ≤ 0.5 mA

Timing and Power Performance

• Signal Delay (Off→On): 0.1 ms

• Signal Delay (On→Off): 0.2 ms

• Power Dissipation: 15.6 W max

• Thermal Dissipation: 53.3 BTU/hr

• Backplane Current: 400 mA @ 5 V DC

Insulation and Safety

• Isolation Voltage: 60 V continuous, tested at 1000 V AC for 60 s

• Insulation Type: Basic

• Temperature Code: IEC T3 / North America T3C

Mechanical and Installation Data

• Module Location: 1771-A1B through A4B I/O chassis (excluding 1771-A4)

• Field Wiring Arm: 1771-WH / 1771-WHF / 1771-WHFB

• Wire Size: 0.34–2.5 mm² (22–14 AWG)

• Torque: 1.0 Nm (9 lb-in)

• Keying Position: Between 10–12 and 22–24

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