Supplies regulated backplane power from an industrial 24 VDC source.
Key Information
IC694PWR331D is the D revision of Emerson’s IC694PWR331 power supply for PACSystems RX3i serial expansion backplanes.
The base unit accepts a nominal 24 VDC input, requires 18 VDC minimum to start and operates from 12 to 30 VDC. Its total load capacity is 30 W.
It occupies one backplane slot and is not a load-sharing or redundant power-supply model.
Functions
Provides Power, OK and Run indications for service diagnostics.
Fits the IC694 serial expansion-backplane family in one slot.
Maintains the D revision for installed-base and approval traceability.
Specifications
| Manufacturer | Emerson / legacy GE Fanuc |
|---|---|
| Exact model and revision | IC694PWR331D |
| Compatibility | PACSystems RX3i IC694 serial expansion backplane |
| Slots occupied | 1 |
| Nominal input | 24 VDC |
| Minimum input to start | 18 VDC |
| Operating input range | 12 to 30 VDC |
| Total load capacity | 30 W |
| Input-to-backplane isolation | 1500 VAC for 1 minute |
| Field wiring | 14 to 22 AWG, up to 2 wires per terminal |
| LED indications | Power, OK, Run |
| Load sharing / redundancy | No |
| Operating temperature | 0 to 60 °C |
| Storage temperature | -40 to 85 °C |
| Humidity | 5 to 95% non-condensing |
| Approvals listed for the base model | UL, CE, ATEX, CCC and selected marine approvals; verify revision-specific marks |
Installation
- Calculate the complete backplane load before selecting the spare; keep total demand within the manufacturer limit.
- Verify DC polarity, protective earth, conductor size and terminal torque before energizing.
- Do not use it as a redundant or load-sharing supply.
- Confirm all modules start correctly and remain within the power budget after replacement.
Lifecycle
- Record input-voltage history and backplane load with the maintenance record.
- Inspect terminals for heat damage and loose conductors.
- Retain the D revision and agency label evidence when approval status matters.
- Replace the supply only after investigating upstream undervoltage or repeated overload events.
About IndustryParts
https://www.industryparts.com/Power supply selection starts with the backplane load
IndustryParts reviews IC694PWR331D with its D revision, serial expansion backplane and full module power budget.
- Backplane verified
- 30 W budget checked
- Revision evidence retained
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FAQ
Can IC694PWR331D be used in an RX3i universal backplane?
It is specified for the IC694 serial expansion backplane. Universal IC695 backplanes use different power-supply families; verify the installed backplane number.
What should accompany an IC694PWR331D enquiry?
Send the supply label, backplane catalog number, module inventory, calculated load, input-voltage source, revision requirement and terminal photographs.
Can two IC694PWR331D units be paralleled for redundancy?
No. Emerson lists no load-sharing or redundancy capability for the base IC694PWR331 supply.
What should be investigated before replacing a failed IC694PWR331D?
Check source voltage during startup, polarity, earth, wiring condition, backplane load, shorts and heat history so a system fault is not transferred to the spare.
What proves IC694PWR331D is stable after installation?
Verify the exact revision, correct input range under load, normal LEDs, clean controller diagnostics and reliable restart of the complete expansion rack.
