Description
Product Introduction & Engineering Value
When expanding a Series 90-70 chassis with high-current CPUs (like the 80486DX4 series) and multiple communication coprocessors, baseplate voltage sag is the primary cause of intermittent backplane faults. The GE Fanuc IC697PWR711K Power Supply delivers 100 Watts of total system power, supplying up to 20 Amps on the critical +5V DC logic bus to keep dense VME configurations fully energized.
Occupying the dedicated power supply bay on the left end of the IC697 baseplate, this auto-ranging supply seamlessly handles universal AC inputs (90–264 VAC) as well as high-voltage DC inputs (100–300 VDC). Revision K features upgraded internal filtering capacitors and improved over-voltage shutdown circuitry, making it significantly less sensitive to line transients in harsh industrial electrical environments.
Technical Specifications
- Module Type: High-Capacity Baseplate Power Supply
- Input Voltage Range: 90 to 264 VAC (47–63 Hz) or 100 to 300 VDC (Universal Auto-Ranging)
- Total Output Power: 100 Watts total combined output
- +5V DC Output: 20.0 Amps maximum
- +12V DC Output: 2.0 Amps maximum
- -12V DC Output: 1.0 Amp maximum
- Power Factor Correction: Internal passive line filter
- Holdup Time: Minimum 20 milliseconds at full load (guarantees orderly CPU shutdown)
- Status Indicators: 3 Front LEDs: AC/DC INPUT OK, OUTPUT OK, OVERTEMPERATURE
- Protection Features: Over-voltage shutdown, short-circuit current limiting, and thermal cutout
- Slot Requirement: Fits exclusively into the leftmost Power Supply bay of IC697 baseplates.
Field Application & The “Trench” Experience
During an unexpected utility voltage brownout at a regional pumping station, an older Revision C power supply inside the main Series 90-70 supervisor rack lost its +5V hold-up capability. The resulting 15ms voltage dip caused the 96 MHz CPU to trip a fatal backplane logic error mid-cycle, locking out three downstream pipeline valves.
The maintenance team replaced the failing PSU with an IC697PWR711K module. The upgraded Revision K board comfortably rode through subsequent line sag events thanks to its 20ms holdup rating and robust auto-ranging front-end. The supply delivered steady, ripple-free 5V power to the power-hungry CPU and attached Ethernet coprocessors, returning the station to uninterrupted 24/7 service.
Target Application Scenarios:
- Fully Loaded CPU & Communication Racks: Powering multi-card VME configurations containing 80486 CPUs, Genius Bus Controllers, and Ethernet cards.
- Remote Substations with Unstable Grid Power: Operating across wide input swings (90–264 VAC or direct substation 125 VDC station battery banks).
- Dual-Rack Hot Standby Systems: Serving as the main power source for high-availability primary or secondary baseplates in critical process plants.
- IC697PWR711K
- IC697PWR711K
Transparency SOP: QA & Testing
Every IC697PWR711K unit coming into our ready-to-ship inventory undergoes rigorous bench loading and environmental stress testing:
- Capacitor & PCB Visual Diagnostics: High-voltage electrolytic capacitors, transformers, and solder bridges are inspected under magnification for thermal fatigue or electrolyte leakage.
- Universal Input Burn-In: Tested across the full AC input range (90 VAC up to 264 VAC) and DC input range (100 to 300 VDC) on an active electronic load bank.
- Full-Load Thermal Cycle: Loaded to 100% capacity (20A @ +5V DC, 2A @ +12V DC, 1A @ -12V DC) inside a burn-in chamber for 8 hours to verify thermal sensor and fanless heat sink dissipation.
- Holdup & Ripple Analysis: Oscilloscope verification ensures +5V DC rail output ripple stays under 50mV peak-to-peak during full-load switching.
The Veteran’s Tech Trap Guide
⚠️ EARTH GROUND TERMINAL REQUIREMENT: Never operate the IC697PWR711K without a heavy, low-impedance ground wire attached to the protective earth (PE) terminal on the front terminal strip. The internal line-filter capacitors vent high-frequency EMI to earth; running ungrounded allows static potential to build up on the chassis frame, causing random communication dropouts on adjacent cards.
⚠️ TOTAL WATTAGE OVERLOAD: Remember that the total combined power draw across all three output rails (+5V, +12V, -12V) cannot exceed 100 Watts. If you pull the maximum 20A on the +5V line (100W), you have 0W remaining for the +12V or -12V lines. Calculate your card consumption using the backplane power tables in manual GFK-0262!
PRO TIP: If the front-panel OVERTEMPERATURE LED illuminates, do not immediately assume the power supply is failing. Check whether dust has accumulated on the cooling fins along the top and bottom edges of the module chassis or if the rack fan assembly (IC697ACC721) has failed.
Dynamic FAQ
Q: Is the a drop-in replacement for older revisions like the PWR711A through PWR711J? A: Yes. Revision K is 100% backward compatible with all earlier revisions of the IC697PWR711 module. It drops into the same baseplate bay and uses the exact same front terminal wiring block.
Q: Can I run this module using a 125 VDC station battery bank instead of AC power? A: Absolutely. The accepts a wide DC input range from 100 to 300 VDC directly on its input terminals without needing any physical jumper changes.
Q: Does this power supply have an internal fuse, and is it field-replaceable? A: Yes, it contains an internal slow-blow fuse for input protection. However, if the internal fuse blows, it typically indicates a catastrophic failure in the primary switching circuit. The module should be bench-serviced rather than just replacing the fuse.
Q: What condition is your stock in, and what warranty is included? A: We supply both New Surplus and fully reconditioned, load-tested power supplies. Every unit is backed by our full 2-year replacement warranty.
Q: Why is the OUTPUT OK LED off even though AC input voltage is verified on the terminals? A: This usually indicates an over-current condition on the +5V bus (shorted backplane pin or damaged I/O module) or an internal over-temperature thermal cutout. Disconnect field loads and pull non-essential cards to isolate the fault.
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