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3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 85 to 264 VAC or 100 to 300 VDC |
| Nominal Input | 120/240 VAC or 125 VDC |
| Output Power | 40 W total maximum |
| +5.1 VDC Output | 5.0–5.2 V, 0–6 A (30 W max) |
| +3.3 VDC Output | 3.1–3.5 V, 0–9 A (30 W max) |
| +24 VDC Relay Output | 19.2–28.8 V, 0–1.6 A |
| Slots Occupied | 2 (Universal Backplane only) |
| Isolation (input to backplane) | 250 VAC continuous; 1500 VAC for 1 minute |
| Ride-through Time | 20 ms |
| Inrush Current | 4 A maximum for 250 ms |
| Operating Temperature | 0 to 60 °C (32 to 140 °F) |
| LED Indicators | Power, P/S Fault, Overload, Overtemperature |
| Load Sharing / Redundancy | Not supported |
4. Product Introduction
The IC695PSA040 is a 40-watt power supply module designed for GE Fanuc / Emerson PACSystems RX3i universal backplanes. It accepts a wide-range AC or DC input (85–264 VAC or 100–300 VDC) and delivers the three voltages required by the RX3i system: +5.1 VDC, +3.3 VDC (internal), and +24 VDC relay power.
It occupies two slots and is the standard choice for small-to-medium RX3i racks that do not require load sharing or redundancy. Status LEDs provide clear indication of power, fault, overload, and overtemperature conditions, allowing quick field diagnosis.
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No Power LED | No input voltage or blown upstream fuse | ✅ High | Measure input voltage at terminals with multimeter | Verify source voltage and fusing before replacing PSU |
| Power LED on but system dead | Overloaded or failed output | ✅ High | Check Overload / Overtemperature LEDs; measure +5.1 V and +3.3 V on backplane | Reduce load or replace PSU if voltages are out of range |
| Overload LED lit | Total load exceeds 40 W or shorted module | ✅ High | Calculate rack power budget; remove modules one at a time | Stay under 40 W total; leave 20 % margin |
| Overtemperature LED lit | High ambient temperature or blocked airflow | ✅ High | Check cabinet temperature and ventilation | Improve cooling; derate power if ambient is high |
| Intermittent power loss | Marginal input voltage or poor wiring | ⚠️ Medium | Monitor input voltage under load; inspect terminal torque | Ensure input stays within 85–264 VAC / 100–300 VDC |
| P/S Fault LED on | Internal power supply failure | ✅ High | Cycle power and observe LEDs; measure all three outputs | Replace the power supply module |
If voltages and LEDs do not point to a clear external cause, replace the IC695PSA040. Always power the rack down and use proper ESD practices when swapping power supplies.
IC695PSA040
IC695PSA040
6. Frequently Asked Questions (FAQ)
Q: What input voltages does the IC695PSA040 accept? A: It accepts 85–264 VAC or 100–300 VDC. Nominal ratings are 120/240 VAC or 125 VDC. Always confirm your plant voltage stays inside the full operating range under load.
Q: How many slots does it occupy? A: Two slots on an RX3i universal backplane (IC695 series only). It will not fit in serial expansion racks.
Q: Can I use more than one IC695PSA040 on the same backplane for redundancy? A: No. The PSA040 does not support load sharing or redundancy. For those features you need the multipurpose supplies (PSA140 / PSD140).
Q: What is the maximum load I can put on this supply? A: 40 W total across all outputs. Individual limits are 30 W on +5.1 V, 30 W on +3.3 V, and 1.6 A on the +24 V relay output. Always calculate the actual module loads and leave margin.
Q: Is the +24 V output isolated? A: The +24 V is the relay power output intended for powering relay-output modules. It is not a fully isolated field supply like some later multipurpose models.
Q: Why is a new-surplus IC695PSA040 often less expensive than current multipurpose supplies? A: The PSA040 is a mature, non-redundant 40 W unit. New-surplus stock is typically project overstock that has been tested and is sold at a lower price while still carrying warranty. Condition is clearly stated as New Original / New Surplus.
Q: Can I hot-swap this power supply? A: No. Always shut down the rack power before removing or installing a power supply module.
