Product Core Brief
- Model:
- Brand: GE
- Series: PACSystem RX3i
- Core Function: Delivers regulated backplane power exclusively for RX3i serial expansion remote base racks.
- Product Type: Serial Expansion Backplane Power Supply Module
- Key Specs: 30W total output | Wide-range AC/DC input | Three isolated output rails Note: Active hardware series; only for IC694 remote expansion racks. Cannot be used inside main IC695CHSxxx controller backplanes. Hot swapping is not supported.
Key Technical Specifications
- Input Range: 85–264 VAC (nominal 120/240 VAC); 100–300 VDC (nominal 125 VDC)
- Maximum Total Output Power: 30 W combined across all rails
- Output Rails: 5 VDC backplane, 24 VDC Relay, 24 VDC Isolated
- Isolation Rating: 1500 VAC input-to-backplane isolation (1 minute withstand)
- Protections: Overvoltage, overcurrent, short-circuit shutdown; internal service fuse
- Minimum Power Ride-Through: 20 ms
- Operating Temperature: 0°C to 60°C horizontal cabinet mounting
- Storage Temperature: -40°C to 85°C
- Form Factor: Single-width IC694 module slot
- Load Sharing & Redundancy: Not supported
- Terminal Wire Range: 14 AWG to 22 AWG; recommended torque 1.3 N·m
- Status Indicators: Power LED, OK LED, Run LED
Product Introduction
This unit supplies stable regulated power to serial expansion remote I/O racks connected to a main RX3i controller. It generates three separate DC power domains to feed backplane logic and field-side I/O circuits.
The wide universal input eliminates jumper selection for different mains voltages, simplifying deployment across global sites. All outputs feature active current limiting to prevent cascaded damage during field wiring shorts.
QA & Testing SOP (Transparency Building)
- Incoming Inspection: Verify part marking and serial traceability. Inspect edge connector pins for bending, housing cracks and terminal block corrosion.
- Live Testing: Mount to validated IC694 expansion backplane, apply nominal AC input. Monitor all three DC rails continuously over a 24-hour resistive load cycle.
- Electrical Testing: Use Fluke 115 to track output regulation. Insulation resistance testing must exceed 10MΩ between primary input and backplane circuits.
- Firmware/Config Backup: Record hardware revision. Photograph terminal wiring layout before disassembly.
- Final QC & Packaging: Place unit inside anti-static shielding. Attach dated QC test tag with rail voltage readings prior to shipment.
Installation Pitfalls & Guide (Engineer to Engineer)
❗ Rack Compatibility Hard Limit: This unit works only with IC694 serial expansion backplanes. Insertion into main IC695CHSxx racks leads to bus faults and permanent module damage. ❗ No Hot Swap Support: The remote base backplane does not support live removal. Cut main input power and lockout-tagout before extraction. ❗ Power Budget Miscalculation: Sum total wattage of all I/O modules on the expansion rack. Exceeding the 30W total rating triggers continuous overcurrent shutdowns. ❗ ESD Dangers: Exposed backplane connector circuits are static-sensitive. Un-grounded handling can create latent regulation drift that appears after commissioning. ❗ Terminal Torque Errors: Loose AC input terminals create thermal hotspots. Over-tightening fractures plastic terminal housings. Follow specified 1.3 N·m torque value.
Replacement Guide:
- Pre-install: Activate lockout-tagout on remote rack AC supply; document all wiring connections.
- Removal: Unfasten input wiring, unlatch module and slide straight out without twisting edge connectors.
- Install: Seat the new unit fully in the dedicated power slot, lock latches, terminate AC wiring to torque specification.
- Power-on Test: Restore input power, confirm OK and Run LEDs illuminate; verify all remote I/O modules communicate with host CPU.
FAQ (Frequently Asked Questions)
Q: Can this power supply be installed in the main controller rack IC695CHS007? A: No. Electrical signaling and slot pinouts differ. Attempting installation will generate backplane errors and may destroy the module or adjacent hardware.
Q: Does the unit support hot swapping? A: No. Remote serial expansion backplanes do not implement hot-swap bus logic. Full power shutdown of the expansion rack is mandatory for replacement.
Q: What is the difference between and IC694PWR331? A: accepts universal AC/125VDC input; IC694PWR331 is 24 VDC input only. They are not direct drop-in replacements unless field power source matches.
Q: Can two of these units run in redundant parallel mode? A: Load sharing and redundancy are not supported. Each remote base requires one dedicated unit. For fault tolerance, deploy separate redundant remote racks.
Q: What happens if the internal fuse blows? A: All DC outputs drop immediately. The fuse is non-serviceable in the field; the unit must be replaced. Do not bypass fuse protection.
Q: Will the host CPU report a fault if this unit fails? A: Yes. Loss of power to the remote base triggers a remote rack communication fault in the controller diagnostic table. Q: What wiring practice reduces input voltage noise? A: Run separate AC input cables away from analog field wiring. Install an input surge suppressor if the cabinet sits near variable frequency drives.
