GE IC693ACC302
GE IC693ACC302 - Image 2

GE IC693ACC302

  • Product Introduction: This is a 4-channel analog input module for the GE Fanuc 90-30 PLC platform. It accepts 4-20mA current loop signals from industrial transmitters measuring pressure, flow, level, temperature, and other process variables. The module provides 16-bit resolution for high-accuracy measurement and is widely used in process control, water treatment, oil and gas, and chemical manufacturing applications. The ACC302 is one of the most common analog input modules in the 90-30 family.
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Category: SKU: GE IC693ACC302

Description

GE IC693ACC302

  • Technical Specifications:
    • Channels: 4 independent analog input channels
    • Input Type: 4-20mA (2-wire transmitter compatible)
    • Resolution: 16-bit (65536 counts)
    • Input Range: 4-20mA (0 to 32767 counts), 0-20mA with external 250 ohm resistor
    • Accuracy: Plus or minus 0.1% of full scale
    • Linearity: Plus or minus 0.05% of full scale
    • Sampling Rate: 10 samples per second per channel (total 40 samples/sec)
    • Isolation: 500V RMS channel-to-channel, 500V RMS channel-to-bus
    • Power Consumption: Approximately 2.5W
    • Operating Temperature: 0°C to 60°C
    • Dimensions: Standard IC693 module form factor (approximately 165mm x 98mm x 120mm)
  • Functional Features:
    • 4 channels with individually configurable input range (mA, mV, or resistance)
    • Supports both 2-wire and 4-wire transmitter configurations
    • Software-selectable input range via register programming
    • Diagnostic LED per channel for fault detection
    • Cold junction compensation available via software for thermocouple inputs
    • Compatible with GE Logicmaster 90-30 and CIMPLICITY programming
    • Backplane-powered, no external supply needed
  • Application Scenarios:
    • Process control: pressure, flow, level, and temperature monitoring
    • Water and wastewater treatment plant instrumentation
    • Oil and gas pipeline monitoring
    • Chemical process control systems
    • HVAC system sensor reading
    • Tank level measurement via pressure transmitters
    • Flow metering in industrial pipelines
  • Performance Parameters:
    • Input Impedance: 250 ohms (for current-to-voltage conversion)
    • Common Mode Rejection: Greater than 100dB at 50/60Hz
    • Noise Rejection: Greater than 80dB normal mode
    • Zero Drift: Less than 0.01% of full scale per degree Celsius
    • Span Drift: Less than 0.01% of full scale per degree Celsius
    • Bus Speed: Genius Bus, 10Mbps
    • MTBF: Greater than 200,000 hours
  • Material Composition:
    • Housing: UL94 V-0 flame-retardant polycarbonate
    • PCB: 4-layer FR-4 glass epoxy, conformally coated
    • Connectors: Gold-plated backplane edge connector, screw-terminal field connectors
    • Isolation: Opto-isolators per channel with LED and phototransistor pairs
    • LEDs: Green status LEDs per channel
  • Structural Features:
    • Standard IC693 module width
    • 4 green LED status indicators on front panel
    • Screw-terminal connections for field wiring (18 to 22 AWG)
    • DIN-rail or chassis mountable
    • Keying notch on PCB for correct orientation
  • Working Principle:
    • The 4-20mA signal from a transmitter flows through a precision 250 ohm shunt resistor inside the module, converting the current to a voltage signal (1V to 5V). A 16-bit Analog-to-Digital Converter (ADC) samples this voltage at 10 samples per second per channel. The digital value is stored in an internal register and made available to the CPU via the Genius Bus backplane. The CPU reads the raw count and scales it to engineering units (PSI, GPM, degrees Celsius, etc.) using software calibration parameters. The optical isolation barrier separates the field signal from the CPU logic, preventing ground loops and noise injection.
  • Installation Requirements:
    • Mount in IC693 or IC695 chassis compatible with 90-30 PLCs
    • Use shielded twisted-pair cable for all analog signals
    • Connect the transmitter loop as follows: plus 24VDC to transmitter positive, transmitter negative to module input positive, module input negative to module common, module common to 0V
    • Ground the cable shield at the chassis end only (single-point grounding)
    • Keep analog cables separated from digital I/O cables by at least 15cm
    • Ensure the transmitter is loop-powered (2-wire) or externally powered (4-wire) as configured
  • Usage Precautions:
    • Never apply voltage directly to the current input — always use a current loop configuration
    • Do not exceed 24mA on any channel
    • Verify the transmitter is compatible with 2-wire loop-powered operation if using that mode
    • Calibrate zero and span values in software for best accuracy
    • Do not run analog cables parallel to high-power AC cables
    • Use external shielding and proper grounding in high-EMI environments

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