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3. Key Technical Specifications
- Input Points: 32 (4 isolated groups of 8)
- Input Voltage: 0–30 VDC nominal 24 VDC
- Input Current: 7 mA per point typical
- On Voltage: >11.5 VDC
- Off Voltage: <5 VDC
- On/Off Delay: 2 ms typical
- Isolation: 250 VAC continuous between groups
- Backplane Current: 195 mA at 5 VDC, 0 mA at 24 VDC
- Operating Temperature: 0 to 60°C
- Storage Temperature: -40 to 85°C
- Dimensions (HxWxD): 5.59 x 1.59 x 4.41 in (142 x 40 x 112 mm)
- Weight: Approx. 0.6 lbs (0.27 kg)
4. Product Introduction
The GE IC694MDL655 is a 32-point digital input module for the PACSystems RX3i programmable logic controller platform. It accepts 24 VDC signals in positive or negative logic configurations and provides 32 discrete inputs across four isolated groups of eight points each.
This module delivers reliable field device monitoring in manufacturing lines, process control, and material handling systems. Engineers choose it for its high-density design, solid isolation, and straightforward integration into existing RX3i racks.
- IC694MDL655
- IC694MDL655
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No LEDs lit on module | No backplane power | ✅ High | Measure 5V and 24V at rack backplane pins | Verify rack power supply first |
| All inputs stuck ON/OFF | Wiring or field device issue | ❌ Low | Measure voltage directly at input terminals | Check field wiring and sensors |
| ERR LED or fault in PLC | Module not seated properly | ✅ Medium | Reseat module and check diagnostic buffer | Cycle power after reseating |
| Intermittent inputs | Loose terminal block | ✅ High | Inspect screw terminals for tightness | Tighten connections; replace if damaged |
| High input current draw | Shorted field wiring | ❌ Low | Disconnect field wires and retest | Repair field side before module swap |
Contact technical support with photos of the module LEDs, terminal wiring, and PLC diagnostic logs if issues continue.
6. Frequently Asked Questions (FAQ)
Is the IC694MDL655 hot-swappable? No. You must power down the rack before installing or removing this module. Hot-swapping can damage the backplane or the module itself.
What is the difference between IC694MDL655 and the older IC693MDL655? The IC694 version is the RX3i high-density equivalent. It fits RX3i racks and maintains similar electrical behavior. Confirm your controller firmware supports the RX3i platform before ordering.
Will this module retain my existing configuration? The module itself holds no user configuration. Input behavior follows the hardware wiring and your PLC program logic. Take a backup of your project before any swap.
Why is New Surplus pricing lower than factory direct? These units come from OEM excess inventory or cancelled projects. They are factory sealed, never installed, and go through full functional testing before shipment.
What firmware or software is required? No specific firmware on the module. Use Proficy Machine Edition or compatible RX3i programming software. Always verify compatibility with your CPU model.
How do I verify the module is genuine? Check the GE/Emerson holographic label, original box markings, and serial number. We provide traceability documentation and test reports with each unit.
What warranty do you offer on New Surplus stock? We provide a 1-year warranty on New Surplus IC694MDL655 modules. Units come with a signed test report showing functional verification.
