Description
nVent Schroff MPS022 | VMEbus Power Supply Module, Category ID
Architect’s Product Breakdown
The Schroff MPS022 power supply module functions as a reliable energy conversion node designed specifically for 6U VMEbus subrack environments. Operating via active power factor correction (PFC), it accepts wide-range AC and DC inputs while providing tight voltage regulation across three independent output rails. Its compact 12 HP plug-in format fits cleanly into standard industrial enclosures without wasting precious backplane slot real estate.
Deploying this unit in brownfield retrofits demands careful verification of input voltage ranges and load distribution across the primary +5V, +12V, and -12V lines. Mismatched current draws or failing to account for total wattage limits can cause the internal overcurrent protection to trip prematurely.
Thermal management remains a primary design consideration for engineers. While the unit relies on natural convection cooling inside standard 19-inch subracks, blocked cabinet air paths or high ambient rack temperatures will degrade overall component lifetime.
MPS022
Key Technical Specifications
| Parameter | Specification |
| Manufacturer | nVent Schroff |
| Model / Part Number | MPS022 / 13100-203 |
| Input Voltage Range | 90 to 264 VAC, 130 to 350 VDC (with active PFC) |
| Total Output Power | 224W |
| Output Rails | +5V (primary high-current), +12V, -12V |
| Form Factor | 6U height, 12 HP width, plug-in unit |
| Cooling | Natural convection |
| Signaling | VMEbus compatible status signals (SYSFAIL / ACFAIL) |
| Operating Temperature | 0°C to +70°C (with derating) |
| Connector Type | H15 connector interface |
Field Engineer’s Pitfall Guide
- Backplane Connector Misalignment: Forcing the module into the subrack can bend or break pins on the rear H15 connector. Always guide the card smoothly along the top and bottom subrack rails before engaging the front panel locking levers.
- Overlooking Current Limits on Auxiliary Rails: Exceeding the current rating on the +12V or -12V rails while keeping total wattage under 224W will still cause rail voltage sag and unexpected VMEbus resets.
- Failure to Verify Input Range Settings: Connecting high-line DC voltages outside the specified window without checking internal jumpers or configuration settings can destroy the input rectification stage.
QA & Testing SOP
- Visual & Origin Inspection: Confirm factory seals, check housing integrity for shipping damage, and verify part number labels against procurement documentation.
- Live Test Environment: Mount the unit in a designated 6U test chassis powered via an isolated variable AC source to monitor start-up behavior.
- Diagnostics & Handshake Tests: Measure output voltages under varying dummy loads, verify proper ripple suppression, and test VMEbus status signal responses (ACFAIL/SYSFAIL).
- Preservation & Packaging: Apply protective end-caps, place the unit inside anti-static dissipative packaging, and box with dense industrial cushioning foam.
Technical FAQ
Can I hot-swap the Schroff MPS022 power module while the system is powered?
Yes, the module supports hot-swapping configurations when used in compatible backplanes equipped with current-sharing and decoupling architecture for redundancy.
Does this power supply require external forced-air cooling?
No, it is designed for natural convection cooling, provided the surrounding 19-inch subrack has proper top and bottom ventilation clearance.
How are output voltages adjusted or monitored?
The unit features front-panel monitoring points or LED status indicators for operational status, while internal rails are factory-regulated to match standard VMEbus backplane distribution requirements.
What protection features are built into this unit?
It includes short-circuit protection, overvoltage protection (OVP), overcurrent protection, and thermal shutdown safeguards to protect sensitive rack hardware.
