Description
Product Introduction
The GE Fanuc IC693PWR331 is a high-capacity 24 VDC power supply engineered for Series 90-30 programmable logic controller racks. It mounts directly into the left-hand dedicated power slot on any 5-slot or 10-slot Series 90-30 baseplate, delivering clean, regulated power across the backplane to drive CPUs, high-density I/O modules, and specialty communication cards.
Unlike standard AC power modules, the IC693PWR331 runs strictly on a nominal 24 VDC input (18 to 30 VDC working range). That makes it the preferred choice for DC-powered control cabinets, remote telemetry units (RTUs), marine vessels, and battery-backed emergency systems. It delivers up to 30 Watts on the +5 VDC logic bus, giving you maximum power density for fully loaded racks without requiring external stepping hardware.
Key Technical Specifications
| Parameter | Value |
| Input Voltage Range | 18 to 30 VDC (24 VDC nominal) |
| Input Power Demand | 50 Watts maximum at full load |
| Maximum Output Power | 30 Watts total output capacity |
| +5 VDC Bus Output | Up to 6.0 Amps (30W maximum) |
| +24 VDC Relay Power | Up to 0.4 Amps (uses internal 24V bus) |
| +24 VDC Isolated Output | Up to 0.75 Amps (18 to 30 VDC user loop power) |
| Inrush Current | 4 Amps peak max (100 ms duration) |
| Internal Protection | Reverse polarity protected; internal fuse |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Backplane Slot Location | Dedicated far-left slot on Series 90-30 baseplates |
Application Scenarios & The “Trench” Experience
When a panel loses its primary 24 VDC supply rail or a reverse-polarity wiring mistake trips a power module on an off-grid skid, the whole process grinds to a halt instantly. You lose backplane comms, remote rack I/O drops out, and the main controller logs a rack fault.
- Oil & Gas Wellhead Skids – Off-grid separator control panels running directly off 24 VDC solar-charged battery banks.
- Marine Engine Monitoring – Shipboard automation racks wired into 24V emergency DC bus networks to survive total generator trips.
- Substation Automation – Remote Terminal Units (RTUs) operating in utility environments where AC line power is absent or unsafe.
Field Case Study: An offshore platform gas-detection rack tripped out after a DC surge blew out the legacy power module on an expansion baseplate. The backup generator couldn’t restore loop power to the 5V bus. Swapping in a pre-tested IC693PWR331 got the 24V DC input rail connected, cleared the chassis fault, and restored real-time sensor polling in under 20 minutes—saving hours of costly flaring downtime.
IC693PWR331
IC693PWR331
IC693PWR331
Transparency SOP: Quality Assurance & Testing
We don’t take “surplus” at face value. Every DC power module undergoes a strict bench testing regimen before it ships out to your plant.
- Inbound Visual Check: Inspect housing latches, backplane pins, terminal screws, and verify original OEM serial tags and revision stamps.
- Reverse Polarity & Component Audit: Verify internal surge suppression MOVs and inspect electrolytic filter capacitors for swelling or ESR degradation.
- Live Rack Rig Testing: Slot the IC693PWR331 into a live Series 90-30 rack populated with a CPU and dummy load modules.
- DC Regulation Under Full Load: Supply 24 VDC from a precision power supply and measure +5V (6A) and +24V isolated rails under 100% full-load capacity.
- Anti-Static Packaging: Enclose in ESD-shielded bags with moisture absorber pouches and pack with dense foam to prevent transportation pin damage.
The Veteran’s Tech Trap Guide (Crucial Value-Add)
⚠️ Double-Check Input Polarity Before Powering Up! Unlike AC supplies, putting +24V into the negative terminal can blow the internal protection components. Label your wires clearly: Terminal 1 is +24VDC, Terminal 2 is DC Return (0V), and Terminal 3 is Frame Ground.
❗ Don’t Exceed the Total 30W Output Budget! The IC693PWR331 can push up to 6.0A on the +5 VDC bus, but the total combined wattage (+5V bus, +24V relay, and +24V isolated) cannot exceed 30 Watts. If your user-isolated loop draw is heavy, calculate total watts to avoid unexpected thermal shutdowns.
⚠️ Watch Out for Voltage Drops on Long DC Cable Runs! If your 24 VDC bulk supply sits far away in another cabinet, voltage drops across long wire runs can dip below the 18 VDC minimum threshold under heavy inrush. Test terminal voltage right at the PWR331 module during startup.
Frequently Asked Questions (FAQ)
Q: What is the main difference between the IC693PWR321 and IC693PWR331?
A: The IC693PWR321 is a standard 18W DC power supply (3.0A on the +5V bus). The is a high-capacity 30W version that delivers up to 6.0A on the +5V bus, making it necessary for larger 10-slot racks filled with power-hungry cards.
Q: Can I hot-swap the while the rack is powered?
A: No. Always disconnect the 24 VDC supply before pulling or inserting this module. Hot-plugging a power supply into a Series 90-30 backplane can arc connector contacts and damage the CPU or adjacent I/O cards.
Q: Does the work on AC line voltage?
A: No. Connecting 120/240 VAC to an will destroy the module instantly. This unit operates exclusively on 18 to 30 VDC.
Q: What if the power supply LED does not turn ON when 24V is applied?
A: Measure DC voltage directly at terminals 1 and 2 with a multimeter. If voltage is within 18–30 VDC, remove power and check for a short circuit on the isolated +24 VDC user output terminals. A downstream short will trip internal overload protection.
Q: Are revision letters (e.g., PWR331C vs PWR331J) interchangeable?
A: Yes. Higher revision letters signify manufacturing upgrades and component updates over time. They share the same form factor, pinouts, and electrical ratings, making them 100% drop-in replacements.
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