GE Fanuc IC693PWR321M Power Supply Module

The IC693PWR321M (also cataloged as IC693PWR321) is a 30 W standard power supply module for the GE Fanuc Series 90-30 Programmable Logic Controller (PLC) family. Operating from either an AC (85 to 264 VAC) or DC (100 to 300 VDC) input source, it installs in the leftmost slot of the baseplate to supply system power across the backplane. The module features three DC outputs, internal battery support for memory retention, and an integrated RS-485 serial port for peripheral or computer communications.

Power Conversion and Voltage Output

This module converts high-voltage AC or DC inputs into three distinct DC voltage rails. The primary output provides +5 VDC (up to 15 W) to drive backplane logic and CPU operations. The secondary outputs include a 24 VDC relay power supply (up to 15 W) for internal relay modules and an isolated 24 VDC output (21.5 to 28 VDC, up to 20 W) to power external field devices and specific I/O modules. The combined total output power across all rails is rated at 30 W, supported by a 20 ms minimum holdup time to sustain operation during brief line-voltage dips.

Protection Features and Serial Interface

The unit incorporates hardware protective measures, including smart switch fusing and a short-circuit power-limiting feature that shuts down outputs during a direct short. Input line overload protection is provided by an internal fuse (GE P/N 44A724627-109, replaceable with Bussmann 215-002 / GDC-2 / GMC-2 or Littlefuse 239-002). Communication capabilities are integrated directly into the module via a 9-pin sub-D connector carrying an RS-485 serial interface, allowing CPU programming, operator interface attachment, or peripheral diagnostics connections.

Frequently Asked Questions

Q: Where is the IC693PWR321M power supply installed in the Series 90-30 rack? A: The module must be installed in the dedicated leftmost slot (Slot 0) of the Series 90-30 baseplate to properly energize the backplane buses and CPU.

Q: What are the replacement specifications for the internal input fuse? A: The factory fuse catalog number is GE 44A724627-109. Equivalent third-party replacement fuses include Bussmann 215-002 (GDC-2 or GMC-2) and Littlefuse 239-002.

Q: Can the IC693PWR321M operate on both AC and DC input power? A: Yes, it accepts either an AC input range of 85 to 264 VAC (120/240 VAC nominal) or a DC input range of 100 to 300 VDC (125 VDC nominal).