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The GE IC693PWR321, also cataloged as the IC693PWR321 Standard Power Supply, operates as a dedicated hardware component for converting line input power into regulated internal operating voltages within Series 90-30 PLC platforms.

Hardware Specifications

Parameter Specification
Model IC693PWR321
Brand GE Fanuc / Emerson
Origin Factory standard
Weight 0.51 kg (1.13 lbs)
Dimensions Single-slot wide (Occupies leftmost dedicated baseplate slot)
Operating Temp 0 to 60 deg C (Standard industrial environment)
Power Consumption Input requirement: 90 VA (AC input) / 50 W (DC input)
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
Total Output Power Rating 30 W maximum
5 VDC Output Capacity 5.0 to 5.2 VDC (5.1 VDC nominal); 15 W maximum
24 VDC Relay Output Capacity 24 to 28 VDC; 15 W maximum
24 VDC Isolated Output Capacity 21.5 to 28 VDC; 20 W maximum
Inrush Current 4 A peak, 250 ms maximum
Holdup Time 20 ms minimum
Overvoltage Protection 6.4 to 7.0 VDC (on 5 VDC rail)
Overcurrent Protection 4.0 A maximum short-circuit current limit
Communication Interface 1 x 9-pin sub-D connector (RS-485 serial protocol)
Internal Fuse Reference GE 44A724627-109 / Bussmann GDC-2 / Littelfuse 239-002

Backplane Bus Power Distribution and I/O Density Scaling

The module installs exclusively into the leftmost slot of the Series 90-30 baseplate to directly drive the internal parallel power rails. It splits its 30 W total output across three specialized internal circuits to allow for robust I/O density scaling without inducing voltage sag. The 5 VDC rail supports local CPU logic processing, while the 24 VDC relay power rail energizes discrete output coil modules. An independent 24 VDC isolated rail supplies external power to select analog or communication modules, maintaining power separation across the deterministic backplane network.

Frequently Asked Questions

Q: What is the electrical behavior of the power supply during a direct short circuit on the field side?

A: The module contains an internal power supply limiting feature that initiates overcurrent protection when current demands reach a maximum of 4.0 A. This automatically limits output power to safeguard the internal backplane components immediately upon detection of a direct short.

Q: Can this power supply module be hot-swapped while the primary line voltage is active?

A: No. The physical design and electrical architecture of the Series 90-30 baseplate require total isolation of input line power and external loops prior to extracting or inserting the power supply unit.

Q: What is the significance of the holdup time specification for this module?

A: The minimum holdup time is 20 ms. This guarantees that the power supply will maintain regulated DC output voltages during brief line power interruptions up to 20 ms, preventing immediate CPU halts or data drops during transient power fluctuations.

Field Installation Guidelines

  • Disconnect all primary AC or DC input power sources and isolate any external loop voltages before executing installation or fuse replacement steps.
  • Insert the power supply module into the dedicated leftmost slot of the baseplate, ensuring the top and bottom chassis tabs line up exactly with the module housing guides.
  • Press firmly until the retention hooks click over the chassis edge to secure the unit against mechanical vibration.
  • Connect line input wires to the designated terminal strip using the appropriate positions for AC (Line, Neutral, Ground) or DC inputs.
  • Confirm that the internal backup battery is connected to its mating terminal to maintain CPU retentive memory registers during unpowered states.

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