Allen-Bradley 1771-IK Encoder/Counter Module

The 1771-IK is an encoder and counter module designed for Allen-Bradley PLC 5 systems. It is used for positioning and frequency counting applications in industrial automation. The module operates with a 12-24 Volts DC external power supply and provides open-collector outputs for interfacing with various devices. It supports both incremental encoders and single-channel devices, with a maximum input frequency of 50 kHz.

Technical Specifications

• Manufacturer: Rockwell Automation
• Brand: Allen-Bradley
• Part Number: 1771-IK
• Module Type: Positioning I/O Module
• Input Voltage: 12-24 Volts DC (Single-Ended Incremental Encoder or Single-Channel Device)
• Max Input Frequency: 50 kHz
• Outputs: 5 Volts DC Open-Collector, 0.5 Ampere per Output
• Slots: 2 Slots
• Module Update Period: 1.3 Milliseconds
• Backplane Current: 1.2 Amps
• Wiring Arm: 1771-WB
• Signal Delay (AC Off): 24 ms (±10 ms)
• Signal Delay (DC Off): 20 ms (±9 ms)
• Mounting: Rack Mountable

Power and Current Requirements

• Current Consumption:
  • 12 Volts DC: 200 milliamps
  • 24 Volts DC: 120 milliamps
• Input Circuits: Max Current Rating: 170 milliamps
• Output Circuits: Max Current: 1.08 Amps
• Power Dissipation: 12.1 Watts
• Thermal Dissipation: 41.3 BTU/hour

Environmental Ratings

• Vibration Rating: 2 G (10-500 Hertz)
• Shock Rating:
  • Operating: 30 G
  • Storage: 50 G
• Operating Temperature Range: 0 to 60°C

• Weight: 1.70 lbs