When a Legacy PLC Rack Demands More 5 VDC Current
A system integrator recently faced a familiar problem: an aging Series 90-30 rack packed with I/O modules kept browning out because the standard power supply could not feed enough current to the +5 VDC backplane. The fix was the GE Fanuc IC693PWR330, a high-capacity power supply that dedicates its full 30 Watts of load capacity to the +5 VDC output. That single design choice keeps larger 90-30 racks running when ordinary supplies fall short.
What Makes This GE Fanuc Module Different
The IC693PWR330 belongs to the GE Fanuc Series 90-30 PLC platform. Unlike standard supplies that split capacity across rails, this unit allows the entire 30 Watts to flow to +5 VDC, which suits racks with many modules drawing backplane power. It installs only in the leftmost slot of the rack and provides backplane power to every attached module.
Three outputs serve distinct purposes. The +5 VDC output carries up to 30 Watts. The +24 VDC Relay output delivers up to 15 watts for relay output module circuitry. The Isolated +24 VDC output supplies up to 20 watts, used internally by some 90-30 modules and available for external 24 VDC input cards.
Technical Specifications at a Glance
| Specification | Value |
|---|---|
| Part Number | IC693PWR330 |
| Series | 90-30 PLC |
| Brand | GE Fanuc |
| Product Type | High-capacity power supply |
| Protocol Support | RS485 |
| Number of Outputs | Three (3) |
| Nominal Rated Voltage | 120/240 VAC or 125 VDC |
| Input Voltage Range, AC | 85 to 264 VAC |
| Input Voltage Range, DC | 100 to 300 VDC |
| Input Power | 90 VA with VAC Input; 50 W with VDC Input |
| Inrush Current | 4A peak, 250 milliseconds maximum |
| Output Voltage | 5 VDC: 5.0 to 5.2 VDC (5.1 VDC nominal); Relay 24 VDC: 24 to 28 VDC; Isolated 24 VDC: 21.5 to 28 VDC |
| Output Power | 5 VDC: 30 Watts max; 24 VDC Relay: 15 watts max; 24 VDC Isolated: 20 watts max |
| Holdup Time | 20 milliseconds, minimum |
| Protective Limit | 5 VDC overvoltage and overcurrent |
| Connection Terminals | 6 |
| Standards | CE, UL |
| Lifecycle Status | Discontinued/Obsolete |
Built for Demanding Industrial Power
The wide AC input range of 85 to 264 VAC and DC range of 100 to 300 VDC lets the module ride through the voltage sags common in older plants. A minimum 20-millisecond holdup time keeps the PLC alive during brief interruptions, preventing nuisance shutdowns that cost production hours. Inrush current stays at 4A peak for a maximum of 250 milliseconds, which protects upstream breakers.
Protective limits guard the critical 5 VDC rail against overvoltage and overcurrent events. Four LED indicators—PWR, OK, RUN, and BATT—give technicians immediate visual status, from external supply health to battery charge. An embedded RS485 port connects the supply to a desktop or laptop workstation, a GE Fanuc Hand-Held programmer, or other compatible serial devices.
Where the IC693PWR330 Fits
Large Series 90-30 racks. When a rack holds many I/O modules, the +5 VDC demand climbs. This supply’s full 30-Watt allocation to that rail prevents brownouts.
Relay-heavy panels. The dedicated 24 VDC Relay output powers relay output module electronics without stealing capacity from the logic rail.
Mixed I/O installations. The Isolated 24 VDC output can feed external 24 VDC input cards, simplifying cabinet wiring.
Installation and Wiring Essentials
The module occupies the leftmost slot of the Series 90-30 rack—no other position works. Six terminals accept user connections. For AC sources, land the hot, neutral, and ground wires on the top three front-face terminals. For DC sources, connect the positive and negative wires to the top two terminals; these connections are polarity sensitive. Always follow the manufacturer’s safety manual and local codes during installation.
Maintenance and Lifecycle Planning
Because the IC693PWR330 is discontinued, replacement planning matters more than ever. Inspect the module periodically for LED status changes and secure terminal connections. Keep spare units on hand to avoid downtime. Contact SpareTechPLC for current availability and replacement options before your next maintenance window.
Compatibility and Integration
The RS485 port supports serial communication with workstations, the GE Fanuc Hand-Held programmer, and compatible serial devices. The supply integrates directly into Series 90-30 racks and powers modules attached to the backplane. Verify your rack configuration and module mix before ordering.
Frequently Asked Questions
Is the IC693PWR330 still in production?
No. GE lists this module as discontinued/obsolete. Contact SpareTechPLC to confirm stock and discuss replacement paths.
Can I install it in any slot?
No. It must go in the leftmost slot of the Series 90-30 rack.
What is the total load capacity?
30 Watts combined across all outputs. Individually, +5 VDC handles 30 Watts, +24 VDC Isolated handles 20 watts, and +24 VDC Relay handles 15 watts.
Does it support both AC and DC input?
Yes. It accepts 85 to 264 VAC or 100 to 300 VDC, with a nominal rating of 120/240 VAC or 125 VDC.
What communication port does it have?
An embedded RS485 port for connecting to workstations, the GE Fanuc Hand-Held programmer, and compatible serial devices.
