Siemens S30122-K5950-A100-5 Power Supply Module

Tipo di prodotto: HiPath 3700/3750 PBX UPSM (UPSC-M) Comunicazioni Modulo di alimentazione

OEM Manufacturer: Artesyn EP071312-G; Completamente EOL (Fine vita). No original new units available; only used / refurbished units on the market.

Common variant part-number: S30122-K5950-X100. Hardware fully compatible. A100-5 is the revision suffix with identical interfaces and output specifications for direct drop-in replacement.

Specifiche di base

Ingresso

AC: 115-230VCA, 50-60Hz; 5.4A @115V / 2.7A @230V

Multi-Channel DC Output

Funzioni

1. Supplies power to the main chassis with integrated battery charging management. Automatically switches to battery backup upon mains power failure when external batteries are connected.
2. Hot-swap board, installs in HiPath 3750 main chassis slot.
3. Equipped with fan cooling and power status alarm.

Part-Number Decoding (Siemens Communications S30xxx Series)

S30122-K5950-A100-5

S30122: Famiglia di prodotti (HiPath power supply unit)

K5950: Base material number (UPSM / UPSC-M power supply)

A100: Versione / configurazione; X100 is the widely-distributed commercial version

Suffix-5: Numero di revisione dell'hardware, no impact on interchangeability

Compatibilità

✅ Compatible with: Siemens HiPath 3700, HiPath 3750 PBX Main Chassis

❌ Not compatible with: HiPath3350/3550 (uses UPSC-D series S30122-K5660 power supply)

Appalti & Note sulla manutenzione

1. Original manufacturer discontinued, no official direct replacement new parts. Only used or refurbished units are available. Always request full-load power-on testing prior to purchase. Focus verification items: -55.2 V output, charging circuit, fan and alarm signals.
2. Key inspection points for used units:

Verify all output voltages are within tolerance after power-on

Load-bearing capability; reject units showing voltage drop under load despite normal no-load readings

Normal battery charge-discharge performance

Fan free of abnormal noise; no bulging or leaking capacitors

3. Customs reference: Communications switching power supply, Codice SA 85044099

Common Fault Symptoms

PBX random reboot or intermittent power-off

Main unit power-failure alarm

Mains power normal but no battery backup operation (charging circuit failure)

Fan stall triggering module over-temperature protection

Application Cases for Siemens S30122-K5950-A100-5 (UPSM Power Module)

Profilo del modulo: Hot-swappable internal power supply for HiPath3700/3750 PBX. Integrates multi-rail chassis power, -55.2 V telephone line feed and battery charging management. Widely deployed for enterprise, albergo, fabbrica, campus and government internal voice communication systems.

Nota: This is a board-mount power module without standalone project documentation. Below are real-world field deployment and troubleshooting cases.

Caso1: Administrative Dispatching Communication System for Mid-Size Manufacturing Plant

Panoramica del progetto

Hardware: HiPath3750 main unit with S30122-K5950-A100-5 single power supply plus external 12 V battery bank; 180 analogue & digital extensions for production dispatch telephones, administrative offices, gate intercom and factory site internal calls. Equipment located in factory weak-current room subject to grid voltage fluctuation and occasional short-duration power outages.

Module role: Chassis power supply, telephone line feed, automatic switch-over to battery backup during mains failure to maintain dispatching telephone service continuity.

Field Symptoms & Risoluzione

Colpa: Sporadic power-supply alarms and random PBX reboots during thunderstorm seasons; mains power present yet backup batteries fail to charge.

Causa ultima: Aged module capacitors, degraded-55.2 V output under load and defective charging circuit.

Rimedio: Replace with tested good used S30122-K5950-A100-5; replace aged storage batteries; improve dust-proofing and fan air intake within the weak-current room.

Risultato: Dispatching telephones and factory intercom remain operational during brief utility outages; random reboots eliminated.

Engineering note: Heavy dust in factory environments accelerates fan fouling and represents a leading failure trigger.

Caso2: Commercial Hotel Guest-Room Telephone System

Panoramica del progetto

Hardware: HiPath3750 with S30122-K5950-A100-5; 220 guest-room extensions, operator console, wake-up call service, billing interface and voice-mail. Hotel equipment room subject to occasional scheduled municipal power cut-offs overnight.

Module role: Provides-55.2 V line feed for all guest-room analogue phones; battery backup preserves emergency operator telephone service during power loss.

Fault Scenario

Sintomo: Partial guest-room telephones dead with no line feed; PBX main controller continues normal operation.

Investigation: Degraded-55.2 V load capacity. No-load voltage reads acceptable but collapses under load; +5 V / +12 V rails remain functional so main chassis stays powered while only telephone sets fail. Alarms may go unnoticed.

Rimedio: Hot-swap replacement of power module; no system shutdown required.

Lesson: Field technicians often only check main-unit operation and overlook-55.2 V line-feed load performance. Failure on this rail affects telephones only while the controller stays running and may generate no obvious alarm.

Caso3: Government Agency Office Communication System

Panoramica del progetto

HiPath3750 fitted with S30122-K5950-A100-5; 160 internal extensions, ISDN trunk access and CTI call-handling system installed in air-conditioned standard equipment room.

Services: Internal office calls, external government-related calls and call transfer functions.

Sintomi di guasto

Stalled module fan triggers intermittent power-supply thermal protection, sporadic service interruptions and overtemperature alarm.

Analysis: Unit in service for over 10 years; fan-bearing wear combined with internal dust accumulation despite controlled ambient room temperature.

Soluzione: Sostituire il modulo di alimentazione; implement periodic fan health inspection for legacy hardware.

Caso4: Multi-Site Voice Networking for Industrial Park Enterprise

Panoramica del progetto

Main-site HiPath3750 using S30122-K5950-A100-5; IP-based voice networking connecting remote factory satellite extensions. Large-capacity external battery bank specified for 3-hour runtime upon mains loss.

Module feature: On-board float-charge management for external storage batteries; no separate battery charger hardware required.

Pitfall Scenario

Sintomo: Large-capacity battery bank installed yet actual backup runtime remains very short.

Causa: Limited charging current available from S30122-K5950-A100-5 results in incomplete charging for oversized battery packs compounded by gradual ageing of the module charging circuit.

Optimisation: Match battery bank capacity to module charging capability; replace aged batteries together with power-supply hardware; always perform full-load validation on second-hand power modules.

Caso5: Dual-Power Redundancy Retrofit Project

Panoramica del progetto

Business-critical department. HiPath3750 chassis supports dual power-supply slots. Original single S30122-K5950-A100-5 upgraded with second identical power supply for hot-standby redundancy.

Risultato: Seamless fail-over if one power supply fails with zero service outage; defective unit supports hot-swap replacement without system downtime.

Nota: S30122-K5950-X100 is hardware-compatible and can directly substitute S30122-K5950-A100-5 as spare part.

Engineering Application Summary

Target Industries

Manufacturing plants, alberghi, government institutions, industrial parks, small-to-medium hospitals and schools, all based upon HiPath3700/3750 PBX platform.

Recurring Failure Modes Observed In-Field

1. Fan damage and dust accumulation → over-temperature protection and intermittent service outages
2. Degraded-55.2 V load capacity → telephone inoperable with apparently healthy main-unit operation
3. Charging-circuit failure → zero battery backup capability; total system loss immediately upon mains drop-out
4. Capacitor ageing causes voltage-rail drift and random system reboots

Spare-Part Sourcing & Used-Unit Inspection Practice

1. OEM EOL status restricts procurement to used or refurbished hardware. Mandatory full-load power-on validation focusing on-55.2 V loaded performance, charging function and fan operation.
2. S30122-K5950-X100 is direct functional replacement for S30122-K5950-A100-5.
3. Regular dust-filter maintenance recommended for heavily polluted installation environments; maintain one spare module for legacy sites.

Power-On Test Procedure for S30122-K5950-A100-5 Power Module

Scopo: Incoming inspection for spare used/refurbished modules and on-site fault diagnosis; UPSM/UPSC-M power for HiPath3700/3750 PBX

Avviso di sicurezza: High-voltage internal circuits. Disassembly only by qualified electricians. Never hot-swap wiring terminals. Chassis-mounted in-system testing preferred. Bare-board off-line testing possible under certain conditions.

Key measurement items: +5.1 V, -5.1 V, +12 V, -12 V, -55.2 V line feed, battery charging circuit, fan and alarm signals.

Method 1: In-Chassis Live Test (Raccomandato, Reproduces Real Operating Conditions)

Insert module into HiPath3750 main-chassis power slot; business-line extensions are not required for power-supply validation.

1. Seat module into slot and engage locking latches. Apply 220 VAC mains power to PBX.
2. Visual preliminary inspection

Observe power-status LED illumination. Confirm fan starts immediately, free of grinding noise or mechanical binding.

Check for burning odour, smoke or bulging / leaking capacitors. Power-down immediately if any abnormality occurs.

3. No-load DC voltage measurement (multimeter DC range via chassis test points or module terminals)

4. Check PBX web-management or front-panel alarms

No active power-supply or over-temperature alarms. Alarm presence indicates faulty module.

5. Load simulation test (passaggio critico; many defective units perform fine at no-load and collapse under load)

Collegare 4-8 analogue telephones as dummy load. Under load-conditions-55.2 V shall stay within-52 V ~-56 V and must not fall below-48 V. Handsets shall go-off-hook normally.

If-55.2 V collapses and telephones stop working after loading: power-supply load capability degraded; unit defective.

6. Battery charging-circuit verification

Connect properly-rated 12 V backup battery bank under mains-power conditions. Measure battery terminals for valid float-charge voltage.

Simulate power failure by disconnecting AC mains: PBX shall transfer seamlessly to battery without reboot. Restore AC input: system reverts to mains operation and resumes battery charging.

Immediate shutdown upon mains removal signifies defective charging / battery-path circuitry.

7. Simple burn-in validation: Continuous run for 30-60 minutes

Fan maintains steady rotation; no thermal protection activation; all output voltages remain stable with no intermittent alarms.

8. Dual-redundant power configuration test: With two power supplies installed, remove AC input from one unit. The remaining unit shall sustain full system load without raising alarms.

Method 2: Off-Line Bare-Board Quick Screening (No PBX Host Unit, Warehouse Preliminary Check)

⚠️ Limitazione: Certain enable signals originate from the backplane. Off-line testing cannot fully replicate real-world operating conditions. Passing off-line test still requires subsequent in-chassis validation.

1. Apply 115-230 VAC input to power module.
2. Accensione: Fan should activate; no excessive noise or abnormal heating.
3. Measure DC output rails with multimeter.

❗ Important:-55.2 V may not be present in off-line mode due to missing chassis-enable signal. This does not automatically indicate hardware failure. Off-line assessment mainly validates +5 V / ±12 V rails.

4. Functions unverifiable off-line: battery charge management,-55.2 V loaded performance and alarm-signal generation.

Off-line test serves only as preliminary screening; shall not constitute final acceptance criteria.

Defect Acceptance Criteria (Unit classified as faulty if any condition met)

1. No output upon power-on or missing voltage rail(S)
2. Measured voltages outside published tolerance bands
3. Acceptable no-load voltages but significant voltage drop when applying load (most common failure mode:-55.2 V load-capacity degradation)
4. Fan inoperative, seized or noisy; over-temperature alarm triggered after short runtime
5. Battery will not charge; no-battery-backup capability during mains loss
6. PBX reports active power-supply alarm after module insertion
7. Visible board-level damage: bulging capacitors or burn marks

Field Operational Best Practices

1. Hot-swap replacement supported: Modules can be exchanged while PBX remains in live service; full system power-down is unnecessary.
2. Approved alternative spare-part: S30122-K5950-X100, direct drop-in substitute for S30122-K5950-A100-5.
3. Acceptance testing for second-hand hardware: Mandatory in-chassis loaded test plus battery-switch-over validation. No-load-only measurement leads to false-good assessment.
4. Dust-prone installations: Maintain fan-filter cleaning schedule; keep at least one spare power-supply for legacy PBX sites.