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1771-IA2

1771-IA2 Allen-Bradley PLC-5 Digital Input Module 120V AC/DC

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  • Manufacturer: Allen-Bradley

  • Product No.: 1771-IA2

  • Product Type: Digital Input Module

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 450g

  • Shipping port: Xiamen

  • Warranty: 12 months

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Allen-Bradley 1771-IA2 PLC-5 Digital Input Module

Product Overview

The Allen-Bradley 1771-IA2 is a PLC-5 digital AC/DC input module with 8 input channels rated at 120V AC/DC. It converts field signals from AC/DC proximity switches and other on/off devices to the logic levels required by the PLC processor. The module includes a 1771-WA wiring arm for easy replacement without disconnecting field wiring. Weight is 0.45 kg.

Specifications

Parameter Value
Brand Allen-Bradley / Rockwell Automation
Model 1771-IA2
Series PLC-5
Module Type Digital AC/DC Input Module
Inputs 8
Voltage Rating 120V AC/DC
Operating Voltage (AC) 87-138 VAC
Operating Voltage (DC) 97-138 VDC
Backplane Current 75 mA
Max Off-State Current 2.8 mA (AC/DC)
Signal Delay ON (AC) 24 ms (±10)
Signal Delay OFF (AC) 24 ms (±10)
Signal Delay ON (DC) 10 ms (±4)
Signal Delay OFF (DC) 20 ms (±9)
Wiring Arm 1771-WA
Power Dissipation 10.7 W Max
Thermal Dissipation 36.5 BTU/hr
Status Indicators 8 Orange LEDs (Field-Side)
Dimensions (W x H x D) 89 x 165 x 51 mm (3.5 x 6.5 x 2.0 in)
Weight 0.45 kg

Key Features

  • 8 digital input channels rated at 120V AC/DC
  • Designed for AC/DC proximity switches and on/off devices
  • Wide operating voltage range: 87-138 VAC or 97-138 VDC
  • 1771-WA wiring arm allows module replacement without rewiring
  • Optoelectrical isolation protects system circuits from transients
  • Input filtering reduces electrical noise interference
  • 8 orange status LEDs for field-side indication
  • Supports ½, 1, and 2-slot I/O addressing
  • Keying bands between pins 10-12 (upper) and 4-6 (lower)
  • Low backplane current draw at 75 mA

Installation Notes

Install the module in a 1771 I/O chassis containing a PLC processor. Use keying bands to ensure proper slot placement: between pins 10 and 12 for the upper connector and between pins 4 and 6 for the lower connector. Connect field wiring using the 1771-WA wiring arm, which allows module replacement without disconnecting wiring. The module supports ½, 1, and 2-slot I/O addressing configurations. Ensure input devices are compatible with the 120V AC/DC rating and observe the specified signal delay times for AC (24 ms) and DC (10 ms ON, 20 ms OFF) operation.

FAQs

Q1: How many inputs does the 1771-IA2 provide?

A1: 8 digital input channels rated at 120V AC/DC.

Q2: What is the difference between AC and DC signal delay?

A2: AC signal delay is 24 ms (±10) for both ON and OFF states. DC signal delay is 10 ms (±4) for ON and 20 ms (±9) for OFF states.

Q3: What wiring arm is compatible with this module?

A3: The 1771-WA wiring arm, which enables module replacement without disconnecting field wiring.

Product Resources

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🏷️ Tags: Digital Input Module

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