Siemens Industrial Power Supply A5E31006890-K9

Manufactured by APtronic AG, modular embedded Alimentazione elettrica for Siemens SIMATIC IPC. A5E31006890-K9 denotes Revision:K9. It is a 150W AC-input industrial PC power supply, fine vita. Available supplies on market include new old stock, used pull-out units and refurbished units.

1. Definizione del modello

APtronic: German power supply manufacturer (OEM supplier for Siemens IPC internal power modules)

cV5_AC: Power series model. AC = mains AC input; cV5_DC variant for DC input is also available.

A5E31006890: Siemens spare part order number; -K9 = Hardware Revision K9

Codice SA: 85366990

2. Specifiche elettriche

Ingresso: CA 100–240 V, 50/60Hz, massimo. 2.3UN, wide-range adaptive

Rated total output power: 150W

Multiple DC outputs:

3V3: 8.5UN

5V1: 16.5UN

12V: 6.5UN

N12 (-12V): 0.3UN

Combined maximum 90W for 3.3V+5V

Montaggio: Drawer-style embedded modular power supply with dedicated backplane connector. Not directly compatible with standard ATX power supplies

3. Modelli compatibili (SIMATIC IPC / HMI IPC)

IPC627B, IPC627C

IPC827B, IPC827C

HMI IPC677B, HMI IPC677C

HMI IPC577C

Nota: cV5 series has multiple revisions (K6/K7/K9). Different revisions are hardware-compatible, though order numbers differ. Priority should be given to matching the spare part number during replacement.

4. Specifiche fisiche

Dimensioni: ca. 130 × 110 × 60 mm

Peso: ca. 1kg

Costruzione: Metal shielded housing with integrated heat sink, no built-in fan. Cooling relies on the IPC chassis airflow.

5. Difetti comuni & Risoluzione dei problemi
6. IPC no power, no LED indicator

Check AC input socket and internal fuse first. Blown fuse usually accompanies damage to internal capacitors or switching transistors.

2. Power cycles / instant power-off upon switch-on

Short circuit on output load (motherboard / hard disk short); or aged electrolytic capacitors inside the power unit (most frequent aging failure).

3. Can boot, but random blue screens or unexpected power loss

Excessive ripple on 12V/5V outputs caused by capacitor degradation. Faults tend to occur more easily under low-temperature conditions.

Service reminder: All output channels must be tested under load. Voltage readings at no load cannot confirm the power supply is functional.

6. Opzioni di sostituzione
7. Original identical replacement: A5E31006890-K9 (Optimal, plug-and-play, no rewiring required). Interrotto; only NOS / ristrutturato / used stock available.
8. Compatible within series: A5E02625806-K6 (cV5_AC Rev K6, compatibile con l'hardware, different order number)
9. Non-standard replacement (utilizzare con cautela): Standard ATX cannot be fitted directly. Custom backplane adapter is required. Multi-channel output timing and PG signal must be matched. Not recommended for long-term use in industrial sites.
10. Manutenzione & Inspection Guidelines

Key inspection points during disassembly: Bulged electrolytic capacitors, Corrosione del PCB, burnt power components, oxidized connector pins.

Acceptance criteria for second-hand units: Load test of all output voltages, ripple measurement, power-up sequence check, minimum 2-hour burn-in test.

ESD protection: ESD precautions are mandatory during disassembly and assembly. The backplane connector has fine pins which are vulnerable to damage.

8. Procurement Remarks

Market status: Siemens has ceased production of this model, no brand-new original factory stock. Available sources: new old stock, tested used pull-outs, repaired refurbished units.

Garanzia: Refurbished units normally come with 12-month warranty; used pull-outs have shorter warranty. A load test report should be requested when purchasing.

1. APtronic cV5_AC (A5E31006890-K9) Backplane Pinout & Power-up Sequence

This power supply uses proprietary Siemens backplane connector, not standard ATX. It includes multi-channel power pins, PG (Power Good) and power enable signal. Timing differs completely from ATX; standard ATX cannot be adapted directly.

Definizione dei perni (Main Connector)

Power-up Sequence (Critical for Repair & Substitution)

1. AC mains applied, internal standby circuit activates
2. +3.3V and +5V ramp up, reach regulation tolerance within 10~20ms
3. +12V and -12V build up subsequently
4. After all outputs stabilize, PG signal turns high with 100~500ms delay. Motherboard receives PG to complete reset and start CPU.
5. Power-down sequence: On AC loss, +12V drops first; +3.3V / +5V maintain hold-up time. PG pulls low in advance to notify motherboard for data saving.

⚠️Risk warning: Even if multimeter shows normal DC voltages, mismatched PG timing may lead to failure to boot, repeated rebooting or blue screen.

2. Tabella comparativa: cV4 / cV5_AC / cV5_DC

3. cV5_AC Power Supply Repair & Second-hand Acceptance Test Checklist

Fare un passo 1: Power-off Visual Pre-inspection (Precondizione di sicurezza)

1. Discharge: Fully discharge high-voltage bulk capacitor to prevent electric shock or multimeter damage.
2. Ispezione visiva: Check PCB for burn marks or component explosion; inspect electrolytic capacitors for bulging, cracked safety vent or electrolyte leakage.
3. Connettore: Check backplane pins for oxidation, bending, breakage or corrosion; verify chassis ground integrity.
4. Offline continuity test:

Check continuity of AC input fuse; open fuse → DO NOT power on before troubleshooting short circuit downstream.

Measur secondary outputs to ground to rule out short circuit (short to ground on 3.3V,5V,12V indicates breakdown of rectifier or capacitor).

Fare un passo 2: No-load Power-on Test (No Load Connected)

1. Apply AC 220V, short PS_ON pin to enable power supply.
2. Measure each DC output with multimeter, reference tolerance:

+3.3V: 3.24~3.42V

+5V: 4.75~5.25V

+12V: 11.4~12.6V

-12V: -11.4~-12.6V

Nota: No-load voltage only for preliminary screening. Normal no-load reading ≠ functional under load.

Passaggio 3: Load Burn-in Test (Core Acceptance for Second-hand Units)

1. Set electronic load to rated current: 3.3V(8.5UN), 5V(16.5UN), 12V(6.5UN), load from 70% A 100% valutazione.
2. Monitoring items:
3. Voltage drop within tolerance on all channels
4. Oscilloscope ripple measurement: 12V ripple＜120mVpp, 5V＜80mVpp, 3.3V＜50mVpp. Excessive ripple is typical root cause for random blue screen and power drop-out.
5. PG signal: Validate power-up delay under load; PG must not drop unexpectedly during load transient.
6. Continuous burn-in: Minimo 2 hours full-load aging, monitor case temperature, no latch-off, no power loss, nessun rumore anomalo.
7. Cold test (optional high-standard acceptance): Load test at 0~5℃ to reproduce intermittent faults.

Step4: Protection Function Verification

Protezione da cortocircuito in uscita: Temporary single-channel short triggers latch protection; power recovers after removing short and reboot.

Sovracorrente / Over-voltage protection: PG de-asserts and power shuts down when output exceeds threshold.

Input under-voltage protection: Power fails to start if AC input below 90V.

Step5: Full Machine Integration Test

1. Install power supply into target IPC (IPC627C / IPC827C etc.)
2. Run system continuously for 4 hours under CPU stress test
3. Check system event log for unexpected power loss, blue screen or hardware errors
4. Perform multiple cold boot and warm reboot cycles to verify consistent power-up and motherboard recognition.

Common Component Replacement List for Repair

Secondary electrolytic capacitors (highest failure rate; replace all with 105℃ high-temperature industrial capacitors)

Primary high-voltage electrolytic capacitor

Input fuse, NTC thermistor

Secondary Schottky rectifier diodes

APtronic cV Series Drawer Modular IPC Power Supply Full Model List

For Siemens SIMATIC box IPC IPC627 / IPC827 / HMI IPC Panel PC. All manufactured by APtronic with Siemens A5E spare part numbers. All series are end-of-life, only used / NOS spare parts available.

Series branches: cV4, cV5_AC, cV5_DC. Same drawer housing, but input circuit and backplane pins are NOT universal.

1. cV4 Series (110W, Ingresso CA, legacy model for IPC627A/IPC827A)

2. cV5_AC Series (150W AC input, your referenced A5E31006890-K9 belongs here)

✅Interchange rule: K6/K7/K9 revisions within cV5_AC series are fully hardware compatible and plug-and-play. Different order numbers only indicate production batch revisions

3. cV5_DC Series (150W DC24V input, same housing as cV5_AC, not directly interchangeable with AC version)

Upgrade Cross-reference Table (Critical for Spare Part Selection)

1. A5E00827436-H3 → Upgrade substitute: A5E31006890-K9 (cV5_AC)
2. A5E02625805-H2 → Upgrade substitute: A5E30947477-H4 (cV5_DC)
3. A5E01231722-F2 → Upgrade substitute: A5E30947477-H4 (cV5_DC)

Key Interchangeability Summary

1. cV4 ≠ cV5: Non intercambiabile, different power rating and backplane pin assignment.
2. cV5_AC ↔ cV5_DC: Identical mechanical housing, but different input circuit and backplane pin definition. Never swap directly.
3. Same model different revisions (K6/K7/K9, H3/H4): Plug-and-play replacement without rewiring.
4. Output specifications: All cV5 (CA/CC) have identical multi-channel DC output parameters; only input power type differs.

Extended Note on Next-generation cV6 Series (For Distinction, not part of cV5)

cV6 is successor drawer power supply with same form factor, but brand new order numbers. Designed for IPC627D/IPC827D, not compatible with cV5, generally separated from cV5 family.