Description
- Model: Schroff MPS022
- Part Number: 13100203
- Brand: Schroff (nVent)
- Series: MPS Series (Modular Power Supply)
- Core Function: AC/DC Multi-Output Power Distribution for Subracks
- Product Type: 19″ Plug-in Power Supply (Euroboard Format)
- Key Specs: 100-240V AC Input Multiple DC Outputs (+5V, +12V, -12V) H15 Connector
- Input Voltage Range: Wide range 100 V AC to 240 V AC (Auto-ranging)
- Output Power: Typically 100W to 150W (Standard for MPS022 footprint)
- DC Outputs:
- +5.0 V DC: High current for logic circuits (VME/CPCI)
- +12.0 V DC: For analog I/O and cooling fans
- -12.0 V DC: For specialized bipolar analog signals
- Connector Type: DIN 41612, Type H15 (High current pins)
- Front Panel: 3U or 6U height (depending on subrack configuration)
- Efficiency: >80% at nominal load
- Protection: Over-voltage (OVP), Over-current (OCP), and Short-circuit protection
- Cooling: Integrated heatsink (requires standard subrack forced-air cooling)
- Status Indicators: Front panel LEDs for “Output OK” and “Input Power”
- Hold-up Time: >20ms (prevents system resets during minor power dips)
Schroff MPS022 13100203
Schroff MPS022 13100203
Schroff MPS022 13100203
Application Scenarios & Pain Points
In high-reliability environments like air traffic control, power plant monitoring, or telecommunications, the Schroff MPS022 is the literal “heart” of the rack. The primary pain point I see is “Thermal Fatigue.” Because these modules are often wedged into dense 19-inch racks, the electrolytic capacitors are subjected to constant heat. Over 10-15 years, these capacitors dry out, leading to increased “Ripple” on the 5V logic line. This causes the CPU modules in the rack to reboot randomly or suffer from “Data Corruption” errors that are incredibly hard to diagnose.
Typical Application Scenarios:
- VMEbus / VME64 Racks Providing the heavy 5V current required for legacy GE or Motorola VME processor boards.
- Industrial PC / CompactPCI Systems Supplying stable, multi-rail power for rack-mounted industrial servers and data acquisition cards.
- Test & Measurement Equipment Used as the primary power source in custom automated test equipment (ATE) racks.
Case Study: The “Mystery Reboot” in a Telecom Hub
Background: A telecom switching center in Southeast Asia was experiencing random “System Restarts” on their main signaling rack. There were no software errors, and the rack temperature was within limits.
The Problem: We used an oscilloscope to monitor the 5V DC rail on the Schroff MPS022. While the multimeter showed 5.01V, the scope revealed massive AC ripple (noise). The aging capacitors in the MPS022 were no longer filtering the switching noise, which was confusing the CPU’s power-sensing logic.
The Solution: We provided a “New Surplus” MPS022 (13100203). Because these are plug-and-play modules, the client was able to hot-swap the power supply (in a redundant configuration) without shutting down the rack.
The Result: – Operational Impact: The random reboots stopped immediately.
- Outcome: The hub avoided a scheduled 4-hour maintenance window that would have disrupted service for thousands of users.
- Client Feedback: “The 13100203 was a direct mechanical and electrical fit. No adjustments needed.”
Compatible Replacement Models
| Original Model | Replacement Model | Compatibility | Main Difference | Integration Effort |
|---|---|---|---|---|
| MPS022 | MPS024 | ⚠️ Limited | Higher wattage; wider footprint | Check rack slot width |
| MPS022 | 13100202 | ✅ Direct Replace | Minor revision difference | Drop-in; zero config |
| MPS022 | CP1500 Series | ❌ Incompatible | Modern switching architecture | Requires different backplane |
Troubleshooting Quick Reference
| Symptom | Likely Cause | Board Related? | Quick Check | Action |
|---|---|---|---|---|
| ‘Output OK’ LED Dark | Blown Input Fuse | ✅ High | Check continuity across the front-panel fuse. | Replace fuse; if it blows again, replace module. |
| CPU Modules Rebooting | High Ripple / Noise | ✅ High | Check 5V rail with an oscilloscope. | Replace the MPS022 module. |
| Fan Failure | +12V Rail Fault | ✅ High | Measure +12V output at the backplane. | If 12V is missing but 5V is present, replace PSU. |
| Module won’t seat | Bent H15 Pins | ⚠️ Medium | Inspect the DIN connector on the rear. | Straighten pins carefully with a tool. |
Integrator’s “Field Tips”:
- The H15 Connector: The Schroff MPS022 uses the H15 connector, which has 15 heavy-duty pins. Before sliding the new module in, inspect the backplane socket. If there is dust or debris in the socket, you’ll get “Arcing” on the power pins, which can melt the plastic connector over time.
- Fuse Selection: If the front-panel fuse blows, always replace it with the exact same rating (e.g., T3.15A 250V). Never use a fast-blow fuse where a slow-blow (T) is required, as the “Inrush Current” of the transformer will pop it instantly.
- Airflow is Life: These modules are convection-cooled but rely on the rack’s fans. If your MPS022 failed, check if the filters at the bottom of your 19-inch rack are clogged. Heat is the #1 killer of these Schroff power units.
