GE IC694PWR331 – PACSystems RX3i 24 VDC Power Supply for Reliable Backplane Power

The GE IC694PWR331 is a PACSystems RX3i power supply module designed to feed the RX3i backplane with stable +3.3 VDC and +5 VDC rails. From my experience, this model is typically used when the control panel already has a 24 VDC bus available, making it a clean drop‑in for machine upgrades and compact MCCs. You might notice that it doesn’t consume an I/O slot—the PSU fits the dedicated power position on the RX3i base, so you keep your rack space for actual I/O and communications.

Our Order Process & Guarantees

• Warranty: 365 days
• Lead time: typically 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment, full payment prior to delivery
• Express delivery options: FedEx, UPS, DHL

Key Features

• 24 VDC input for industrial panels – Suits cabinets with existing DC power, simplifying wiring and power distribution.
• Backplane power for RX3i – Supplies the +3.3 V and +5 V rails required by RX3i CPUs, I/O, and comms modules.
• Status LEDs – Clear front LEDs for quick at‑a‑glance health checks during commissioning and maintenance.
• Short‑circuit/overload protection – Designed to protect the rack and stabilize operation under fault conditions.
• Dedicated power slot – Installs in the RX3i power position, so it doesn’t use up an I/O slot.
• Field‑proven in mixed‑load racks – In many cases, handles CPU plus several I/O and network modules without derating when properly powered and ventilated.

Technical Specifications

Quick field note: a packaging plant maintenance lead told us they swapped an IC694PWR331 into an RX3i rack powering a CPU, two PROFINET modules, and six discrete I/O cards—no undervoltage alarms after they corrected a loose 24 VDC feed and ensured cabinet airflow. It seems to be fairly forgiving as long as the DC bus is stable and the rack loading is within spec.

Related & Supporting Products

• IC694PWR321 – RX3i power supply, AC input version. Good when 120/230 VAC is available in the cabinet.
• IC695PSA040 – RX3i high‑capacity AC power supply (IC695 series), used for larger or newer RX3i racks.
• IC695PSD040 – RX3i 24 VDC power supply (IC695 series), common in systems needing higher current or redundancy strategies.
• IC695CHS012 / IC695CHS016 – RX3i base racks (12/16‑slot), typical backplanes used with the above supplies.
• IC695CPU310 (and family) – RX3i CPUs that the IC694PWR331 powers via the backplane rails.

Installation & Maintenance

• Environment – Install in a clean, dry cabinet. Typically 0–60 °C, 5–95% RH non‑condensing. Keep wiring clear of high‑noise VFD cables.
• Mounting – Use an RX3i base with a dedicated PSU position. Panel‑mount or DIN‑rail per the base rack design.
• Wiring – Use correctly sized DC conductors with ring or ferrule terminations. Bond cabinet PE/ground properly. Keep the 24 VDC feed stable and within the module’s DC tolerance.
• Ventilation – Provide airflow around the PSU and avoid placing heat‑intensive devices directly beneath it.
• Safety – Isolate power before insertion/removal. Follow ESD handling when working inside the cabinet.
• Routine checks – Inspect terminal tightness, clean dust from vents, verify LED status on power‑up, and review rack loading after any I/O expansion.

Quality & Certifications

• Certifications: Typically CE and UL/cUL for industrial control equipment; RoHS compliant in most cases.
• Manufacturer Warranty: Backed by our 365‑day warranty policy on supply.

One thing I appreciate is how straightforward the IC694PWR331 is to deploy—especially in brownfield projects where 24 VDC is already present. If you share your planned rack bill of materials, we can sanity‑check backplane power consumption and confirm the delivery window.