Description
Compressor Controls Corporation PSMU-350-3 | CPCI Power Supply
Dynamic Product Introduction
Loss of power rail integrity in critical turbomachinery control systems can trigger catastrophic trip sequences across multi-stage compressors and steam turbine trains. When managing anti-surge, speed regulation, or performance control loops, power supply ripple and brownout sensitivities become absolute operational vulnerabilities. The Compressor Controls Corporation PSMU-350-3 power supply module functions as the primary backplane energy engine for Vanguard duplex chassis systems, keeping critical control cards online during severe power grid transients.
Designed around the CompactPCI (CPCI) form factor, the PSMU-350-3 integrates directly into ten-slot Vanguard subracks to deliver clean, isolated DC voltage rails to primary and secondary processing cards. Taking advantage of hot-swappable architecture within duplex setups, technicians can replace a degraded supply line without bringing the turbomachinery control loop offline. Whether deployed in offshore platform gas lift systems or refinery cracking units, this module provides high MTBF and structural noise rejection—though maintaining proper chassis fan tray cooling remains essential for maximum service life.
PSMU-350-3
Key Technical Specifications
- Manufacturer and Platform: Compressor Controls Corporation (CCC) / Vanguard Control Series
- Module Part Numbers: PSMU-350-3 / CPCI-350Q-P-38
- Bus Architecture: CompactPCI (CPCI) 3U/6U Eurocard Backplane Interface
- Power Output Rating: 350 Watts continuous output
- AC Input Range: 90 V AC to 264 V AC universal line input (47–63 Hz)
- DC Output Rails: +5 VDC, +12 VDC, -12 VDC, and +3.3 VDC backplane logic feeds
- Redundancy Support: Parallel N+1 load sharing and hot-swap capability in Vanguard duplex chassis
- Diagnostic Capabilities: Front-panel Power OK / Fault LEDs and internal status monitoring signals
- Operating Ambient Temperature: 0°C to +50°C (32°F to 122°F) continuous operational envelope
- Enclosure Rating: Heavy-duty aluminum Eurocard chassis with integrated poslock backplane connectors
Global Sourcing & Live-Test SOP (Transparency Core)
Supplying pre-owned or surplus turbomachinery hardware requires exhaustive bench testing to ensure power stability before hardware lands on active control racks. Every PSMU-350-3 passing through our supply network undergoes a strict five-stage quality assurance protocol:
- Inbound Verification: Part numbers, internal circuit board revision tags, and CCC serial labels are verified against factory manufacturing databases. We inspect the front panel mechanical card ejectors, check backplane pin alignment, and examine internal electrolytic capacitors for thermal swelling or ESR degradation.
- Live Simulation: The PSMU-350-3 module is inserted into an authentic Vanguard duplex ten-slot CPCI chassis powered by an adjustable AC line transformer (Variac) to test operation across the entire 90–264 VAC input range.
- Diagnostics: Electronic load banks are applied across all individual DC voltage output rails (+5V, +12V, +3.3V). Using a Fluke 87V digital multimeter and an oscilloscope, voltage regulation is confirmed to hold within ±1% tolerances with peak-to-peak AC ripple remaining under factory millivolt limits under 100% full-load conditions.
- Thermal & Load Soak: The power supply operates continuously for 12 hours under a simulated 80% maximum rated load inside an environmental test enclosure, ensuring high-temperature stability and verifying internal thermal protection circuits.
- Final Prep: Terminal pins are cleaned with electronic contact cleaner, connector covers are fitted, and the PSMU-350-3 is vacuum-sealed in a anti-static moisture-barrier bag.
The Field Engineer’s Pitfall Guide
❗ Operating in a Duplex Chassis with a Failed Fan Tray: Never leave a PSMU-350-3 running in a Vanguard duplex rack if the lower chassis cooling fan tray fails. Because CompactPCI high-density power supplies pack 350W into a compact form factor, losing forced airflow causes rapid internal heat accumulation, tripping thermal protection and shortening the lifespan of output smoothing capacitors.
❗ Unseated Backplane Poslock Pins During Hot-Swapping: When replacing a PSMU-350-3 in an active duplex chassis, failing to fully engage the top and bottom card ejector handles can cause partial pin contact with the CPCI backplane. In field deployments, a loose power connector pin can create arcing, injecting transient noise into adjacent CPU cards and triggering unexpected anti-surge valve movements.
❗ Ignoring AC Line Phase Balance on Quad Power Setups:In Vanguard ten-slot duplex chassis configurations utilizing four PSMU-350-3 power modules, verify that incoming AC supply feeds are properly balanced across field distribution breakers. Running multiple power modules off unbalanced or ungrounded AC lines degrades internal power factor correction and increases high-frequency noise on sensitive analog I/O cards.
Intent-Driven FAQ
Q: Is the PSMU-350-3 hot-swappable in a running Vanguard control rack? Yes. In Vanguard duplex chassis configurations equipped with redundant power supply slots, the PSMU-350-3 can be hot-swapped while the system is under live power without interrupting controller operations. Always confirm that the secondary power module shows a solid green “Power OK” LED before unseating the target module.
Q: Can the PSMU-350-3 be used in standard commercial CompactPCI chassis?While the PSMU-350-3 conforms to mechanical CPCI form factor dimensions and connector pinouts, its keying and output power rails are specifically tailored for Compressor Controls Corporation Vanguard series chassis. Verify backplane pin assignments and keying blocks before attempting to use this module in non-CCC enclosures.
Q: What front panel status lights indicate an internal output failure on the PSMU-350-3? The module features front panel LED indicators. A solid green LED indicates all DC output rails (+5V, +12V, +3.3V) are within normal voltage windows. If the LED turns red or goes completely dark while AC input power is verified, the internal over-voltage or over-current protection circuit has tripped, or an internal fuse has opened.
Q: Does the PSMU-350-3 require manual switch settings for 110V vs 220V AC input?No. The PSMU-350-3 features an active wide-range switching front end that automatically accepts input voltages anywhere from 90 V AC to 264 V AC (50/60 Hz), eliminating the need for manual jumper changes or voltage selection switches.
Q: What is the functional difference between part numbers PSMU-350-3 and CPCI-350Q-P-38? They refer to the exact same hardware build. is the primary system model number utilized in CCC documentation and spare parts catalogs, while CPCI-350Q-P-38 is the detailed sub-assembly manufacturing part number stamped on the physical side label.
