GE IC693CHS392
GE IC693CHS392 - Image 2

GE IC693CHS392

  • Product Introduction: This is a 2-channel high-speed counter module for the GE Fanuc 90-30 PLC platform. The “CHS” designation stands for Counter High Speed. It accepts 5V differential (RS-422 compatible) encoder signals and is designed for precise position and speed measurement in motion control applications. It supports frequencies up to 5MHz and provides 32-bit counting resolution. This module is commonly used in servo motor feedback, conveyor position tracking, and CNC machine axis control within the 90-30 system.
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Category: SKU: GE IC693CHS392

Description

GE IC693CHS392

  • Technical Specifications:
    • Channels: 2 independent high-speed counter channels
    • Input Type: 5V differential (RS-422 compatible, A/B phase)
    • Maximum Frequency: 5MHz per channel
    • Counter Resolution: 32-bit signed (−2,147,483,648 to +2,147,483,647)
    • Input Voltage: 5V differential nominal
    • Input Impedance: 100 ohms differential
    • Isolation: 500V RMS optical isolation from backplane
    • Power Consumption: Approximately 1.5W
    • Operating Temperature: 0°C to 60°C
    • Dimensions: Standard IC693 module form factor
  • Functional Features:
    • 2 independent 32-bit counters with quadrature decoding (A/B phase)
    • Supports up/down counting for bidirectional encoder feedback
    • Hardware-based counting — independent of CPU scan cycle
    • Supports modulo counting (reset at preset value)
    • Supports latch and capture functions for snapshot readings
    • Diagnostic LED per channel
    • Compatible with GE CIMPLICITY and Logicmaster 90-30 programming
    • Backplane-powered
  • Application Scenarios:
    • Servo motor position and speed feedback
    • CNC machine axis control
    • Conveyor belt position tracking
    • Rotary encoder interfacing
    • Web tension control
    • Cut-to-length applications
  • Performance Parameters:
    • Counting Accuracy: Plus or minus 1 count at maximum frequency
    • Response Time: Less than 500 nanoseconds per count
    • Common Mode Rejection: Greater than 1000V
    • Noise Immunity: Differential signaling rejects common-mode noise
    • Bus Speed: Genius Bus, 10Mbps
    • MTBF: Greater than 200,000 hours
  • Material Composition:
    • Housing: UL94 V-0 polycarbonate
    • PCB: 4-layer FR-4, conformally coated
    • Connectors: Gold-plated backplane edge connector, screw terminals for encoder connections
    • Isolation: High-speed opto-isolators (LED + fast phototransistor)
    • LEDs: Green status indicators per channel
  • Structural Features:
    • Standard IC693 module width
    • 2 green LED indicators on front panel
    • Screw-terminal connections for encoder A, B, and Z signals
    • DIN-rail or chassis mountable
    • Keying notch for correct orientation
  • Working Principle:
    • The module receives differential A/B phase signals from incremental encoders. An internal FPGA/ASIC processes the quadrature signals, determining direction and accumulating counts in a 32-bit register. The Z (index) pulse can be used for home position detection. The CPU reads the counter value via the Genius Bus during each scan cycle. Hardware-based counting ensures no counts are missed even at 5MHz. The optical isolation barrier protects the CPU from electrical noise on the encoder cables.
  • Installation Requirements:
    • Mount in IC693 or IC695 chassis
    • Use shielded twisted-pair cable for encoder connections (120 ohm characteristic impedance recommended)
    • Connect encoder A+ to module A+, A− to module A−, same for B and Z signals
    • Ground the cable shield at the chassis end only
    • Keep encoder cables away from high-power motor drives (minimum 30cm separation)
    • Terminate the differential lines with 100 ohm resistors if cable length exceeds 10 meters
  • Usage Precautions:
    • Do not exceed 5V differential on any input — overvoltage will damage the input circuitry
    • Do not connect single-ended signals to differential inputs without proper conversion
    • Verify encoder signal voltage is 5V differential (RS-422) before connection
    • Use proper termination for long cable runs
    • Do not hot-swap the module — power down the chassis before insertion/removal
    • Keep encoder cables separated from AC power cables by at least 30cm

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