GE IC697BEM733
GE IC697BEM733 - Image 2

GE IC697BEM733

  • Product Introduction: This is a battery backup module (BBM) designed for the GE Fanuc 90-70 PLC system. It provides battery-backed power to maintain SRAM memory contents when the PLC is powered down or during power interruptions. This ensures that retentive data (program variables, data table values, retentive timer/counter values) is not lost during power outages. The “733” suffix indicates it provides 3.3V DC output for low-voltage SRAM chips used in the CPU and memory modules.
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Category: SKU: GE IC697BEM733

Description

GE IC697BEM733

  • Technical Specifications:
    • Output Voltage: 3.3VDC ± 5%
    • Output Current: 200mA continuous (maximum)
    • Battery Type: 1/2 AA lithium battery (ER14250, 3.6V, 1200mAh) — user-replaceable
    • Battery Life: Approximately 5 years at 25°C (with typical load)
    • Backup Time: Sufficient to maintain SRAM for years ( current draw is microamps)
    • Connectors: 2-pin connector for battery, backplane edge connector
    • Power Consumption: <10mA from backplane
    • Operating Temperature: 0°C to 60°C
    • Dimensions: Standard IC697 module form factor
  • Functional Features:
    • Maintains SRAM data in CPU and memory modules during power loss
    • LED indicator for battery status (green = OK, red = low battery)
    • Automatic switchover from backplane power to battery on power failure
    • Low battery warning signal sent to CPU
    • User-replaceable battery — no special tools required
    • Compatible with all 90-70 CPU and memory modules requiring battery backup
  • Application Scenarios:
    • Retaining retentive program data in 90-70 PLCs
    • Data logging applications where historical data must survive power cycles
    • Batch process control where recipe data must be preserved
    • Any 90-70 application requiring non-volatile data retention without flash memory
  • Performance Parameters:
    • Voltage Regulation: Linear regulator with <5% dropout
    • Battery Monitoring: Voltage threshold detection at 2.8V (low battery warning)
    • Switchover Time: <10ms (seamless to SRAM)
    • Self-Discharge: <1% per year (lithium battery)
    • Isolation: No isolation needed — internal to PLC rack
  • Material Composition:
    • Housing: UL94 V-0 ABS plastic
    • PCB: 2-layer FR-4, conformally coated
    • Battery Holder: Spring-loaded contact with polarity key
    • Regulator: Low-dropout linear regulator (LDO) IC
    • LEDs: Red/green status LED
  • Structural Features:
    • Standard IC697 module width (half-slot or full-slot depending on variant)
    • Front-facing battery compartment door (snap-fit)
    • 2 LED indicators: Power (green), Low Battery (red)
    • Backplane edge connector with keying
  • Working Principle:
    • During normal operation, the backplane supplies 5V to the module, which regulates it down to 3.3V for the . When backplane power fails, a diode-OR circuit automatically switches the SRAM power source to the lithium battery. The battery maintains 3.3V to the SRAM chips indefinitely (until depleted). The CPU is notified of the low battery condition via a status bit.
  • Installation Requirements:
    • Mount in IC697 chassis (90-70 compatible)
    • Install the battery before powering up the PLC
    • Ensure the battery compartment door is closed and latched
    • No external wiring required — connects via backplane only
  • Usage Precautions:
    • Replace the battery every 5 years or when the low battery LED turns red
    • Use only GE-specified ER14250 lithium battery — do not use alkaline or rechargeable batteries
    • Do not mix old and new batteries
    • Replace battery with the PLC powered on (hot-swap supported for this module)
    • Dispose of old batteries according to local hazardous waste regulations

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