Configured for internal backplane bus powering and AC/DC voltage conversion in PACSystems RX3i platforms, the GE Fanuc IC694PWR321 (IC694PWR321 Power Supply Module) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC694PWR321 |
| Brand | GE Fanuc Emerson |
| Origin | USA |
| Weight | 1.19 lbs (0.54 kg) |
| Dimensions | Single-slot RX3i module width |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 30 Watts total output power capacity |
| Nominal Input Voltage | 120/240 VAC or 125 VDC |
| AC Input Range | 85 to 264 VAC |
| DC Input Range | 100 to 300 VDC |
| 5V DC Output | 5.0 to 5.2 VDC (15 Watts maximum) |
| Isolated +24VDC Output | 21.5 to 28 VDC (20 Watts maximum) |
| Relay +24VDC Output | 24 to 28 VDC (15 Watts maximum) |
| Ride-Through Time | 20 ms minimum |
| Input Isolation | 1500 VAC for 1 minute |
| Input Fuse Protection | 2 A (2 units) |
Backplane Bus Communication Velocity & Power Distribution
The IC694PWR321 power supply converts primary AC or DC field power to deliver regulated logic and field power rails directly to the PACSystems RX3i backplane bus. Stable backplane bus communication velocity and deterministic execution are maintained across all backplane I/O slots by supplying tight +/-5.2 VDC logic power alongside +24 VDC isolated and relay outputs up to 30 Watts total load capacity. Internal firmware execution cycles and rack logic states are sustained during brief power supply dips via a minimum 20 ms ride-through time. Dual 2 A input fuses and 1500 VAC input isolation provide transient suppression to safeguard backplane-connected CPU and I/O modules.
Frequently Asked Questions
Q: What input supply voltage boundaries are accepted by the IC694PWR321 power supply module?
A: The module accepts nominal input voltages of 120/240 VAC (85 to 264 VAC range) or 125 VDC (100 to 300 VDC range).
Q: What are the wattage limits across individual output voltage rails?
A: The total combined output power is 30 Watts, split across +5 VDC (15 Watts max), isolated +24 VDC (20 Watts max), and relay +24 VDC (15 Watts max).
Q: How does the module handle momentary power losses on the primary supply line?
A: The module incorporates input energy storage providing a minimum 20 ms ride-through time to prevent system resets during transient power interruptions.
Field Installation Guidelines
- Turn off primary power sources and verify de-energized conditions before wiring or installing the module into the PACSystems RX3i baseplate.
- Insert the IC694PWR321 into the dedicated power supply slot on the far left of the RX3i rack, pressing until the backplane contacts align and connect fully.
- Tighten top and bottom panel mounting screws to secure the unit against vibration and ensure proper chassis earth bonding.
- Wire primary AC (85 to 264 VAC) or DC (100 to 300 VDC) power supply leads to the terminal strip using appropriate wire gauges and ring lugs.
- Route primary input wiring in separate conduits away from sensitive low-voltage DC logic and analog signal cabling.
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