Allen-Bradley 1771-IKC Series A Encoder/Counter Module

The Allen-Bradley 1771-IKC Series A is a high-speed encoder/counter module designed for the 1771 I/O platform used with PLC-5 programmable controllers. The module independently processes encoder and counter inputs, allowing accurate position, speed, and pulse counting without burdening the PLC processor. It supports single-channel counter mode or dual-channel quadrature encoder mode and is commonly used in motion control, material handling, packaging, and manufacturing automation.

Confirmed Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)
• Catalog Number: 1771-IKC
• Series: A
• Product Type: Encoder/Counter Module
• PLC Platform: 1771 I/O / PLC-5
• Operating Voltage: 12–24 VDC External Supply
• Input Configuration:
  • Single-channel counter
  • Dual-channel quadrature encoder
• Maximum Input Frequency: 50 kHz
• Data Formats Supported:
  • Binary
  • BCD
• Encoder Resolution Modes:
  • X1
  • X2
  • X4 Quadrature Counting
• Transfer Modes:
  • Single Transfer
  • Block Transfer
• Outputs:
  • (2) Open-collector outputs
  • 5 VDC, 0.5 A maximum per output
• Home/Limit Switch Input: 12–48 VDC
• Module Update Period: Approximately 1.3 ms
• Backplane Current Draw: Approximately 1.2 A
• Isolation: 1500 VAC (type tested)
• Mounting: 1771 I/O Chassis
• Compatible Wiring Arm: 1771-WB
• Designed for high-speed encoder and counter applications.

Typical Applications

• PLC-5 automation systems
• Rotary encoder feedback
• Position control
• Conveyor tracking
• Cut-to-length machinery
• Packaging equipment
• Material handling systems
• Indexing tables
• Motion monitoring
• Industrial manufacturing