GE IC660ELB921H
GE IC660ELB921H - Image 2

GE IC660ELB921H

  • Product Introduction: This is a 16-channel 24VDC sinking (NPN) digital input module for the VersaMax PLC platform. It accepts sinking-type sensor signals, which is the standard in North American and Japanese automation. Each channel is opto-isolated and provides fast, reliable digital input reading for industrial control applications.
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Category: SKU: GE IC660ELB921H

Description

 GE IC660ELB921H

  • Technical Specifications:
    • Channels: 16 independent digital input channels
    • Input Type: 24VDC sinking (NPN)
    • Input Voltage Range: 18VDC to 30VDC (logic high), 0V to 5VDC (logic low)
    • On/Off Threshold: 10VDC turn-on, 3VDC turn-off
    • Input Current: Approximately 3mA per channel (sinking)
    • Response Time: 1ms ON→OFF, 10ms OFF→ON
    • Isolation: 500V RMS optical isolation per channel group
    • Power Consumption: Approximately 4W
    • Operating Temperature: 0°C to 60°C
  • Functional Features:
    • 16 channels with individual LED indicators
    • NPN/sinking input type — compatible with most global sensors
    • Channel grouping: 2 groups of 8 channels with common isolation barriers
    • Diagnostic capability via front-panel LEDs
    • Backplane-powered design
  • Application Scenarios:
    • High-density input applications in packaging machines
    • Multi-sensor monitoring in automotive assembly
    • Process control panel input aggregation
    • Machine safety interlock circuits
    • Batch counting and event logging
  • Performance Parameters:
    • Input Impedance: ~5kΩ typical
    • Isolation Voltage: 500V RMS (field to logic)
    • Common Mode Rejection: >1000V
    • Bus Speed: 10Mbps VersaMax backplane
  • Material Composition:
    • Housing: Flame-retardant ABS, UL94 V-0
    • PCB: 4-layer FR-4, RoHS compliant
    • Terminals: Tin-plated copper screw terminals
    • Isolation: Opto-couplers with LED + phototransistor pairs
  • Structural Features:
    • Standard IC660 module size
    • 16 red LED status indicators on front panel
    • Two isolation barrier zones (channels 1-8 and 9-16)
    • DIN-rail or chassis mount
  • Working Principle:
    • NPN sensors switch the 0V (ground) side. When active, the sensor pulls the input terminal to ground. The module detects this as a closed circuit through the opto-isolator’s input LED, which activates the phototransistor on the logic side, signaling a logic “1” to the CPU.
  • Installation Requirements:
    • Mount in IC695 or IC697 VersaMax chassis
    • Wire NPN sensors: sensor output to module input, sensor ground to common
    • Use 20-26 AWG wire
    • Common terminal must be connected to 0V/ground
  • Usage Precautions:
    • Only use with NPN (sinking) sensors — PNP sensors will not function
    • Do not leave input channels floating — always wire to a defined state
    • Ensure common ground connection is solid
    • Avoid wiring near high-current cables (>30cm separation)

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