1771-IB

Overview

1771-IB Allen-Bradley PLC-5 8-Point Digital Input Module is a discrete input module designed for DC signal monitoring in PLC-5 systems, offering opto-electrical isolation and robust environmental compliance.

Input Configuration

• Inputs per Module: 8

• Input Voltage Range: 10–27 V DC

• Nominal Input Current: 8 mA @ 12 V DC, 24 mA @ 24 V DC

• Maximum Off-State Current: 3.0 mA

• Maximum Off-State Voltage: 7.0 V DC

• Minimum On-State Voltage: 10 V DC

• Input Impedance:

  • On-state: 1–2 kΩ max

  • Off-state: 2–3 kΩ max

Performance Characteristics

• Input Signal Delay:

  • Low to High: 12 ms + 7 ms

  • High to Low: 20 ms + 7 ms

• Power Dissipation: 5.7 W max, 0.4 W min

• Thermal Dissipation: 19.3 BTU/hr max, 1.4 BTU/hr min

• Backplane Current: 74 mA @ 5 V DC (+5%)

• Opto-Electrical Isolation: 1500 V AC rms

Environmental Ratings

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

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

• Relative Humidity: 5–95% non-condensing

Mechanical Ratings

• Module Location: 1771 I/O chassis

• Weight: 0.20 kg (0.44 lbs)

• Conductors Wire Size: 14 AWG stranded max

• Insulation: 3/64 inch max

• Category: 21

• Keying: Between 4–6, 14–16

• Field Wiring Arm Catalog Number: 1771-WA

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