Description
Product Introduction
The GE Emerson PACSystems RX3i IC695PSA040 is a standard 40-watt power supply module built specifically for RX3i Universal Backplanes (IC695CHS012 or IC695CHS016). Occupying a single power slot on the chassis, it accepts universal AC line inputs ranging from 85 to 264 VAC (or high-voltage DC from 100 to 300 VDC) and distributes regulated internal DC power across the backplane bus to energize CPUs, I/O modules, and communication cards.
Unlike multi-slot or load-sharing power supplies, the IC695PSA040 offers a compact, cost-effective power solution for standalone racks and standard density I/O configurations. It features built-in overcurrent and overvoltage protection mechanisms, along with front-panel diagnostic LEDs that give maintenance technicians instant status visibility on input power and internal backplane rail integrity.
Key Technical Specifications
| Parameter | Value |
| Input Voltage Range | 85 to 264 VAC (47–63 Hz) or 100 to 300 VDC |
| Nominal Input Rating | 100–240 VAC or 125 VDC |
| Maximum Output Power | 40 Watts total output capacity |
| +3.3 VDC Bus Output | Up to 9.0 Amps (within 30W total limit for +3.3V/+5.1V combined) |
| +5.1 VDC Bus Output | Up to 6.0 Amps (within 30W total limit for +3.3V/+5.1V combined) |
| +24 VDC Relay / Expansion Output | Up to 1.0 Amp (24W max) |
| Inrush Current | 4 Amps peak max (250 ms duration) |
| Isolation Voltage | 1500 VAC input to backplane logic ground |
| Backplane Slot Location | Dedicated Power Supply slot or standard slot on RX3i Universal Chassis |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
Application Scenarios & The “Trench” Experience
When a power supply module fails on a primary PLC rack, the backplane logic rails collapse instantly. The CPU drops offline, I/O bus communications halt, and downstream field devices lose control signals—bringing the production line to a grinding halt.
- Water Pumping & Lift Stations – Supplying clean DC power to local RX3i CPU305/CPE305 racks and discrete I/O cards in standalone remote enclosures.
- HVAC & Facility Management – Powering centralized building automation control racks handling temperature, damper, and fan interlocks.
- Food & Beverage Conveyance – Running medium-density I/O chassis across secondary packaging lines where line voltage spikes occur frequently.
Field Case Study: A commercial bakery experienced an unexpected line outage when a primary power module failed inside a main dough mixer panel due to extended thermal cycling. The dark CPU brought the entire mixing line to a halt. Swapping in a fresh IC695PSA040 into the RX3i chassis restored backplane power, cleared the chassis fault, and got the mixing cycle running again in under 12 minutes—saving thousands of pounds of raw dough from spoiling.
IC695PSA040
IC695PSA040
Transparency SOP: Quality Assurance & Testing
Power supplies take the brunt of electrical line noise and thermal strain. We test every IC695PSA040 module under full rated load conditions before it receives a QC clearance stamp.
- Inbound Mechanical Check: Inspect housing latches, backplane connector pins, terminal block screws, and verify original OEM serial labels and revision marks.
- Capacitor & Filter Audit: Inspect primary electrolytic filter capacitors for swelling, ESR degradation, or signs of thermal distress.
- Live RX3i Backplane Rig Test: Slot the PSA040 into a live RX3i Universal Backplane populated with CPU and loaded dummy cards.
- Output Voltage Regulation Under Load: Apply 120/240 VAC line input and measure +3.3V, +5.1V, and +24V rails using a calibrated DMM under 100% 40W rated load capacity.
- Anti-Static ESD Packaging: Seal the power supply in an anti-static shielding bag with moisture absorbers and box with custom dense foam packaging.
The Veteran’s Tech Trap Guide (Crucial Value-Add)
⚠️ Calculate Your +3.3V and +5.1V Power Budget First! The IC695PSA040 is rated for 40W total, but the combined output on the +3.3V and +5.1V logic rails cannot exceed 30 Watts! If you fill an 8-slot or 12-slot rack with power-hungry PCI communication modules (like multiple ETM001 or PNC001 cards), you can easily exceed this limit. Step up to the 50W IC695PSD040 or IC695PSA140 multi-slot supply if you need more headroom.
❗ Observe Wire Polarity on DC Input Operations! When powering the PSA040 from a high-voltage DC source (100–300 VDC), verify line polarity at the terminal block: Terminal 1 is AC Line / DC+, Terminal 2 is AC Neutral / DC-, and Terminal 3 is Frame Ground. Reversed DC wiring will blow the internal fuse!
⚠️ Power Supply Slot Keying Matters! Ensure the module is seated firmly into the dedicated power supply slot on the RX3i baseplate before tightening the top and bottom mounting screws. Loose terminal seating can cause intermittent logic resets under high vibration.
Frequently Asked Questions (FAQ)
Q: What is the main difference between the IC695PSA040 and the IC695PSD040?
A: The operates on AC line power (85–264 VAC) or high-voltage DC (100–300 VDC). The IC695PSD040 is a low-voltage DC power supply operating exclusively on 24 VDC (18–30 VDC input).
Q: Can I parallel two power supplies for redundancy?
A: No. The standard does not support load-sharing or redundant power configurations. If you require redundant power supplies in an RX3i chassis, you must use the multi-slot, load-sharing IC695PSA140 or IC695PSD140 power supply modules.
Q: Is the hot-swappable?
A: No! You must ALWAYS disconnect main line power before pulling or inserting the power supply module. Removing the power supply under load will drop backplane power to the CPU and risk arcing the connector contacts.
Q: What should I check if the PWR LED on the module is OFF?
A: First check for main AC/DC input voltage across terminals 1 and 2 with a multimeter. If input voltage is present but the LED remains unlit, disconnect power and check for an internal blown fuse or a short circuit on the external +24 VDC expansion loop.
Q: What warranty comes with this power supply module?
A: All new surplus and fully bench-tested pre-owned modules shipped from our facility come backed by a full 12-month replacement warranty.
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