Basic Positioning and Adaptation Scope
1. **Product Classification**: The **large-capacity power module specifically for the RX3i PLC serial expansion backplane** from the original GE Fanuc (now part of Emerson’s PACSystems product line). It is designed for single-slot rack plug-in installation and is only compatible with the RX3i remote expansion rack. It cannot be used on the mainframe backplane; and it is different from the ABB excitation board and Bently TSI monitoring card you previously queried. They belong to different industrial control categories and cannot be mixed and replaced with Emerson.
2. **Core Function**: Provides stable backplane power supply for the CPU and I/O cards in the expansion rack. It comes with multiple electrical protections and is suitable for power expansion scenarios in production lines, metallurgy, and chemical distributed PLC sites.
Core Hardware Parameters Table
| Parameter Item | Detailed Specifications | | — | — |
| Rated Input | Nominal 24VDC, operating range 12~30VDC, minimum startup voltage 18VDC |
| Maximum Load Power | Overall output 30W, equipped with 5V main output and isolated 24V auxiliary output |
| Isolation Performance | Voltage withstand between input and backplane 1500VAC (withstand test for 1 minute) |
| Status Indicators | 3 LED channels: PWR power, OK normal, RUN operating status lights |
| Wiring Specifications | Compatible with 14AWG~22AWG cables |
| Environmental Conditions | Operating temperature 0~60℃, storage – 40~85℃; humidity 5%~95% without condensation, board with three protection coatings |
| Redundancy Features | Does not support load sharing, redundant parallel use |
| Occupied Slot | Standard single-slot rack slot |
Main Functional Features
1. **Multiple Voltage Stabilized Outputs**: Provide 5V power supply for the backplane + isolated 24V auxiliary power supply to meet the power requirements of various card components in the expansion rack;
2. **Integrated Fault Self-Detection**: Real-time monitoring of input under-voltage, overcurrent, and overheating faults, with intuitive alarm through indicator lights, and built-in overvoltage / overcurrent / short-circuit protection;
3. **Wide Voltage Adaptability**: 12~30VDC wide input range, suitable for industrial environments with large voltage fluctuations;
4. **Rack Plug-and-Play**: Serial expansion backplane can be directly plugged and installed, and maintenance can be carried out by power-off replacement.
Typical Application Scenarios
Factory automation assembly line distributed expansion PLC stations, remote IO cabinets for chemical/oil process control systems, PLC expansion racks for metallurgical rolling mills, power expansion for water treatment automation substations.
Purchase Replacement & Maintenance Tips
Spare Parts Matching
Purchase strictly follows the complete model `IC694PWR331`, hardware compatibility with subsequent suffix modifications (e.g., IC694PWR331D) of the same series. Before installation, confirm the correct DIP rack number setting for the expansion rack.
Common Fault Phenomena
All card components of the rack lose power and restart, OK light goes out, communication interruption of the expansion station, normal input voltage but no output from the module.
Disassembly and Assembly Specifications
Power off the entire machine to release residual electricity of the rack, wear an anti-static wristband for plugging and unplugging; Select the appropriate wiring diameter for connections to avoid overload and overheating of the terminals. Table
| Model | Category Usage | Compatible System | | — | — | — |
| IC694PWR331 | PLC Expansion Rack Power Module | GE RX3i PLC |
| 3500/60 | Unit Temperature Monitoring Card | Bently 3500 TSI System |
| 3BHB Starting Board Card | Excitation / Transmission Control Board | ABB Power Transmission System |
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