Converts the site AC or DC source into regulated backplane power.
Product Overview
IC694PWR321B is the B revision of the IC694PWR321 power supply used with PACSystems RX3i serial expansion racks.
Emerson’s RX3i I/O ordering data identifies IC694PWR321 as a 30 W supply for 120/240 VAC or 125 VDC input service.
The B revision must remain visible in procurement and maintenance records; this page does not merge it with the higher-capacity IC694PWR330.
Performance
Supports the installed module set within the 30 W total power budget.
Provides a service boundary between field supply wiring and the expansion rack.
Keeps the B revision traceable for installed-base support.
Technical Details
| Manufacturer | Emerson / legacy GE Fanuc |
|---|---|
| Exact model and revision | IC694PWR321B |
| Compatibility | PACSystems RX3i IC694 serial expansion rack |
| Input class | 120/240 VAC or 125 VDC |
| Output capacity | 30 W |
| Product class | Serial expansion-rack power supply |
| Revision control | B suffix retained |
| Distinct adjacent model | IC694PWR330 is a different high-capacity catalog number |
System Integration
- Verify the installed IC694 serial expansion rack catalog number.
- Calculate the complete rack load rather than relying on the previous supply alone.
- Confirm the actual input source, branch protection, earth and conductor condition.
- Use the exact service documentation for terminal torque, fusing and revision-specific approvals.
Applications
- Powering a documented IC694 serial expansion rack within the 30 W budget.
- Maintenance replacement where the complete IC694PWR321B label matches.
- Legacy RX3i expansion-rack support with controlled input and grounding verification.
About IndustryParts
https://www.industryparts.com/Legacy rack power is verified from source to load
IndustryParts reviews IC694PWR321B with the input source, serial expansion rack and current 30 W module budget.
- B revision retained
- Rack load recalculated
- Source wiring reviewed
FAQ
Q01What should accompany an IC694PWR321B enquiry?
Provide the complete supply label, rack catalog number, module inventory, load calculation, source voltage, wiring photographs and required approval marks.
Q02Can IC694PWR321B be replaced by IC694PWR330 automatically?
Do not assume direct substitution. The power-supply family and capacity differ; confirm mechanical, electrical and approval compatibility through Emerson documentation.
Q03Why must the rack load be recalculated for IC694PWR321B?
Modules may have changed since the original installation. A current inventory is needed to confirm the 30 W limit and startup margin.
Q04What should be checked after an IC694PWR321B trip or failure?
Inspect source quality, branch protection, terminals, earth, rack load, shorts and ventilation before fitting another supply.
Q05What proves IC694PWR321B is ready for service?
Confirm label and revision, correct source selection, stable backplane operation, normal controller diagnostics and repeatable rack restart under full installed load.
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