Product Overview

The Emerson GE Fanuc IC695PSD040 serves as a high-performance, standalone 40-Watt DC power supply module engineered specifically for the PACSystems RX3i automation framework. This single-slot module clips directly into an RX3i universal backplane to convert standard external 24 VDC input lines into three precisely regulated internal output voltage rails (+5.1 VDC, +3.3 VDC, and +24 VDC relay power). By routing isolated current directly into the chassis bus, this card delivers the electrical foundation needed to power complex multi-core CPUs, fiber-optic communication processors, and dense analog or digital I/O banks in standalone automation structures.

Technical Specifications

Engineering Advantages

Triple Isolated Voltage Rails Meet Diverse Component Loads

The internal transformer topology splits incoming energy into three independent internal output rails to cover distinct component requirements across the backplane. The high-capacity 3.3 VDC rail delivers up to 9 Amperes to drive high-speed microprocessors and internal logic gates smoothly, while the separate 24 VDC relay rail provides up to 2 Amperes to actuate external field interlocks. This distinct multi-rail separation stops inductive switching spikes on the relay lines from leaking back into sensitive logic processors, shielding calculations from corrupting voltage sag anomalies.

Robust Safety Shunts and Ride-Through Defend Against Power Dips

The module embeds comprehensive overvoltage, overcurrent, and thermal monitoring circuitry that halts operations before erratic external supply fluctuations can damage delicate backplane silicon. A 10-millisecond minimum ride-through buffer allows the power supply to maintain uninterrupted backplane output voltages during brief brownouts or line switching gaps. If field wiring errors cause a prolonged short circuit, the active overload sensor drops the output voltage instantly, safeguarding adjacent rack modules from thermal overload conditions.

Space-Saving Single-Slot Profile Simplifies Enclosure Layouts

The IC695PSD040 occupies exactly one standard slot position on any RX3i Universal Backplane, maximizing the panel space left for functional interface hardware. The front terminal block accommodates heavy-gauge 14 to 18 AWG wires directly, establishing solid physical contacts that endure the continuous micro-vibrations of heavy industrial machinery rooms. A protective front toggle cover shields the manual power switch from accidental physical contact by plant technicians, eliminating the risk of accidental system power-downs.

FAQs

• Can I install two IC695PSD040 modules side-by-side in a single backplane to create a redundant power layout?

  No. Emerson engineers designed this specific 40-Watt model exclusively for standalone, non-redundant automation systems. The module does not contain the internal current-sharing synchronization circuits or load-balancing diodes needed for parallel operations. For systems that require active hardware redundancy, you must select the specialized redundant power supply models within the RX3i series catalog.

• Why does the input voltage operating range drop down to 12 VDC after system startup?

  The internal power controller demands a stable 18 to 30 VDC window during initial power-up sequences to energize the storage capacitors and cross the start-up threshold safely. Once the module enters run mode, the circuit architecture expands its operational tolerance downward to 12 VDC. This broad operational window allows the system to ride through severe battery bank voltage sags or deep generator cranking drops without dropping out the backplane logic power.

• How should a plant engineer interpret the Overtemp LED activating on the front panel?

  An active Overtemp LED signals that internal component temperatures have crossed safe thermal thresholds, often due to restricted cabinet ventilation or an overloaded backplane load draw. If the internal heat climbs further, the thermal shutdown circuit triggers an automatic, protective power cutoff to preserve the module components. To resolve this condition, verify that the combined current draw of your active modules stays within the 40-Watt total boundary, and check that standard cabinet airflow passes through the slot lines freely.