Power Supply Module | GE Fanuc IC693PWR321R Series 90-30

The GE Fanuc IC693PWR321R is a standard 30-watt power supply module designed for GE Fanuc Series 90-30 PLC baseplates. Occupying the dedicated power supply slot (slot 0) on the left side of the rack, it converts main AC or DC incoming power into regulated internal voltage rails required to power the central processing unit, backplane logic, and I/O modules.

Internal Power Conversion and Bus Voltage Rails

The IC693PWR321R operates on broad input voltage ranges of 85 to 264 VAC (120/240 VAC nominal) or 100 to 150 VDC (125 VDC nominal). It distributes three distinct regulated output voltage rails across the system bus, maintaining a total maximum power limit of 30 W across all outputs.

• +5 VDC Logic Power Rail: Delivers up to 15 W (3 A) directly to the backplane to drive CPU processing microprocessors and module logic circuits.
• +24 VDC Relay Power Rail: Drives internal switching relay coils on discrete digital output cards.
• +24 VDC Isolated Loop Power Output: Provides isolated +24 VDC auxiliary output via front screw terminals to power external 4-20 mA loop transmitters and field sensors.

System Diagnostics and Serial Interface

The IC693PWR321R includes a front-accessible 15-pin D-shell serial port supporting RS-485 communication via GE Fanuc SNP and SNP-X protocols. This interface enables direct connection to programming laptops, handheld programmers, and display panels. Front-panel LED status indicators provide real-time diagnostic visual verification for incoming power status, +24 VDC output integrity, and CPU memory retention battery voltage levels.

Technical Specifications

Installation and Wiring Safety

Field wiring connects directly to the front terminal block. The protective earth ground line must be securely wired to the designated terminal stud to ensure system electromagnetic noise suppression and user safety. The PLC rack must be completely de-energized before removing or inserting this module into the baseplate.

Frequently Asked Questions

Q: What does the "R" suffix in part number IC693PWR321R indicate?

A: The "R" suffix designates a specific hardware revision level within the standard IC693PWR321 30 W power supply module family, maintaining full functional compatibility with earlier versions.

Q: Can the IC693PWR321R supply external power to field sensors?

A: Yes, an isolated +24 VDC auxiliary supply is available on the front screw terminals to power external field transducers and input loops.