1771-OAD

Overview

1771-OAD is an Allen-Bradley AC output module with 16 channels, designed for 12–120 V AC applications in PLC-5 systems, providing reliable switching with zero-crossing control and surge protection.

Module Identity

• Model: 1771-OAD

• Product Type: AC Output Module

• Manufacturer: Allen-Bradley Rockwell

• Outputs per Module: 16

• Module Location: 1771-A1B through -A4B or later I/O chassis, 1771-AM1, -AM2 chassis

Output Specifications

• Output Voltage Range: 10…138 V AC @ 47–63 Hz

• Output Current Rating: 2 A per output (max 8 A per module)

• Surge Current (max):

  • 25 A per output for 100 ms, repeatable every 1 s

  • 25 A per module for 100 ms, repeatable every 1 s

• Minimum Load Current: 5 mA per output

• On-State Voltage Drop (max):

  • 1.5 V at load current > 50 mA

  • 5.8 V at load current < 50 mA

• Off-State Leakage Current (max): 3.0 mA per output @ 138 V AC

Timing Characteristics

• Signal Delay (max):

  • Off to On: Zero crossing 8.3 ms @ 60 Hz, 10.0 ms @ 50 Hz

  • On to Off: Zero crossing 8.3 ms @ 60 Hz, 10.0 ms @ 50 Hz

Power & Thermal Data

• Power Dissipation: 1.5 W (min), 13 W (max)

• Thermal Dissipation: 5.13 BTU/hr (min), 48.0 BTU/hr (max)

• Backplane Current: 295 mA

Isolation & Safety

• Isolation Voltage: Tested at 2500 V DC for 1 s (UL508 & CSA C22.2 #142 compliance)

Environmental Ratings

• Operating Temperature: 0…60 °C (32…140 °F)

• Storage Temperature: -40…85 °C (-40…185 °F)

• Relative Humidity: 5…95% (non-condensing)

Conductor Specifications

• Wire Size: 14 AWG stranded maximum

• Insulation: 3/64 in maximum

• Conductor Category: 11

• Keying: Between 10 and 12, between 20 and 22

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