Introduction to the GE IC695PSD040 Power Supply
Maintenance engineers know that a stable power supply is the backbone of any control system. The IC695PSD040 is a rack power supply module built for the GE PACSystem RX3i platform, currently under Emerson Automation and originally produced by GE Intelligent Platforms. It mounts directly into Slot 0 of an RX3i universal backplane and provides regulated power to all modules in the rack. With three outputs and a compact single-slot design, this module keeps your process running without unnecessary downtime.
Technical Specifications That Matter on the Floor
Understanding the key ratings helps you plan power budgets and avoid nuisance trips. The module accepts 18 to 30 VDC for startup and 12 to 30 VDC during normal run, with a maximum input power of 60 Watts at full load. It delivers a total output power of 40 Watts across three outputs. The 5.1 VDC output supplies 0 to 6 Amps, while the 3.3 VDC output handles 0 to 9 Amps. A third 24 VDC output can energize relay output module circuits. Regulation stays tight: the 5.1 VDC rail holds between 5.0 and 5.2 VDC, and the 3.3 VDC rail stays between 3.1 and 3.5 VDC. Ripple is limited to 50 mV, which protects sensitive logic circuits. The 10 ms ride-through time maintains output during brief input dips, preventing unnecessary shutdowns. Inrush current peaks at 4 Amps for 100 milliseconds maximum.
Output Power Distribution
The 40 Watt total is split between the two main logic rails. Each of the 5.1 VDC and 3.3 VDC outputs can deliver up to 30 Watts maximum, but the combined total must not exceed 40 Watts. This means you cannot fully load both rails simultaneously. Plan your module count and relay usage accordingly.
Where the IC695PSD040 Fits in Your Operation
Manufacturing Cell Retrofit
When upgrading an older RX3i rack, the IC695PSD040 provides a drop-in power solution. Its 24 VDC auxiliary output simplifies wiring for relay output modules, reducing panel space and terminal count.
Water Treatment Control Panel
In remote pump stations, input voltage can sag. The 12 VDC run threshold and 10 ms ride-through keep the PLC alive during brownouts, avoiding costly restarts and process interruptions.
Packaging Line Expansion
Adding I/O modules to an existing RX3i backplane requires careful power budgeting. The IC695PSD040 supports up to two daisy-chained units for load sharing, though this does not increase total capacity. If demand exceeds 40 Watts, move modules to a separate backplane.
Installation and Setup for Serviceability
Mount the module in Slot 0 of the universal backplane. Use 14 AWG to 18 AWG wiring for field terminals. The front-panel On/Off switch allows safe isolation during maintenance without pulling wires. Four LED indicators—Power, P/S Fault, Overtemperature, and Overload—give immediate visual status. Note that redundancy and increased capacity modes are not supported, so plan for single-supply operation.
Maintenance and Reliability Best Practices
From a maintenance engineer’s perspective, the IC695PSD040 is straightforward to service. Inspect the module every six months for dust buildup and secure terminal connections. Check the LED indicators during routine rounds; an Overtemperature LED suggests blocked airflow or ambient conditions above specification. The 50 mV ripple specification helps you detect aging capacitors if you have an oscilloscope. Because the module has no isolation, ensure your backplane grounding is solid. Keep spare units on hand to minimize mean time to repair.
Compatibility and Integration Notes
The IC695PSD040 works exclusively with the RX3i universal backplane. It powers RX3i I/O and controller modules. The 24 VDC output is intended for relay output module circuits. It does not support redundant power supply configurations or controller redundancy. For systems requiring redundancy, consider a different power architecture.
Selection Guide: What to Verify Before Ordering
Confirm your backplane is an RX3i universal type. Calculate total load: add module currents and relay loads, ensuring the sum stays under 40 Watts. Check that your input supply provides at least 18 VDC at startup. Verify you have 14-18 AWG wire available. If you need more than 40 Watts, plan a second backplane. SpareTechPLC stocks the IC695PSD040 and can help you confirm compatibility.
Frequently Asked Questions
Can I use two IC695PSD040 modules for redundancy?
No. The module does not support power supply redundancy. Daisy-chaining up to two units is allowed but does not increase output capacity.
What does the 24 VDC output power?
The 24 VDC output is designed to energize circuits on relay output modules. It is not a general-purpose supply for field devices.
How do I know if the module is overloaded?
The Overload LED illuminates when current exceeds limits. Check total load and redistribute modules to a separate backplane if needed.
What is the ride-through time and why does it matter?
The module maintains output for 10 ms after input drops below minimum. This prevents shutdowns during brief power fluctuations.
Is this module still available?
Please verify current lifecycle status and availability with SpareTechPLC before ordering.
