1. General Information

• Manufacturer: Bently Nevada (Baker Hughes)

• Model Number: 3500/15

• Main Board Part Number: 127610-01

• Rear I/O Board: 125840-01 (AC Rear Terminal Board)

• Product Name: Low Power AC Power Supply Module

• Series: 3500 Machinery Protection System

• Module Type: Half-height compact AC power supply (Old Generation)

• Application: Provides stable DC bus power for small-scale 3500 rack; suitable for low-slot quantity configuration; commonly used in old power plant and petrochemical monitoring cabinet; supplies power for vibration, temperature and communication modules.

• Installation Rule: Fixed leftmost slot of rack, dual power redundancy supported

• Compliance: API 670, CE, UL

2. Functional Description

• Power Conversion: Isolated AC-DC switching power conversion

• Main Bus Output: +5 VDC backplane power for rack modules

• Auxiliary Output: -24 VDC sensor excitation power

• Redundancy Mode: Hot backup parallel operation for dual power

• Self-Diagnosis: Power OK LED indicator & internal fault detection

3. Electrical Specifications

• Input Voltage Range: 85 ~ 264 VAC Universal Wide Voltage

• Input Frequency: 47 Hz ~ 63 Hz

• Rated Output Power: 150 W (Low power version)

• Max Rack Slots Support: ≤ 6 slots small rack configuration

• Conversion Efficiency: ≥ 82%

• Isolation Voltage: 2000 VAC reinforced isolation

• Protection Function: OVP, OCP, SCP overvoltage & short circuit protection

4. Environmental Specifications

• Operating Temperature: -30 °C ~ +65 °C (-22 °F ~ +149 °F)

• Storage Temperature: -40 °C ~ +85 °C (-40 °F ~ +185 °F)

• Relative Humidity: 5% ~ 95% (Non-condensing)

• Anti-vibration: Compliant with API 670 industrial vibration standard

5. Mechanical Specifications

• Structure: Half-height compact power module

• Dimensions (H × W × D): 241.3 × 12.2 × 251 mm

• Weight: Approximately 0.40 kg

• Mounting: Hot-swap capable, left dedicated power slot

6. Compatible Devices

• Matching Rear Board: 125840-01 (High AC Voltage Terminal Board)

• Applicable Rack: Small capacity 3500 rack (6/8 slots)

• Redundancy Configuration: Dual 127610-01 parallel backup

7. Key Features

• Half-height mini size saves rack installation space

• Wide AC input adapts to unstable industrial power grid

• Simple circuit design, low failure rate for long-term operation

• Complete protection circuit to prevent module burnout

• Cost-effective for small auxiliary machine monitoring cabinet

8. Critical Power Supply Comparison (Most Important)

• 127610-01: Old small power, 150W, ≤6 slots, old cabinet low load.

• 106M1079-01: New high power, 1200W, 14 slots full rack, main turbine cabinet.