1. General Information

• Manufacturer: Bently Nevada (Baker Hughes)

• Part Number: 140471-01

• Product Name: 3500/42M Internal Termination I/O Board

• Applicable Module: 3500/42M Proximitor/Seismic Monitor

• Module Type: Full-height internal termination daughter board (No rear board)

• Application: Built-in screw terminals inside the 3500/42M housing; no external rear I/O board required. Used for conventional non-explosion-proof industrial vibration monitoring racks.

• Installation Rule: Pre-installed inside 3500/42M main module

• Compliance: API 670

2. Interface Definition

• Sensor Input Terminal: 4-channel internal screw terminals for proximity, velocity or accelerometer sensors

• Analog Output Terminal: 4-channel 4-20mA internal analog output terminals

• Internal Connector: Gold finger interface for connecting 3500/42M main circuit board

• Shielding Terminal: Integrated shielding grounding terminal

3. Electrical Specifications

• Sensor Power: -24 VDC for eddy-current proximity probe

• Input Impedance: 10 kΩ per dynamic channel

• Analog Output Load: Max 600 Ω for 4-20mA loop

• Isolation Voltage: 1500 VAC channel-to-system isolation

• Signal Bandwidth: 0.5 Hz ~ 10 kHz

• Terminal Rating: 300 V built-in screw terminal block

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: Full-height internal termination daughter board

• Dimensions (H × W × D): 240 × 22 × 155 mm

• Weight: Approximately 0.22 kg

• Mounting: Internal fixed installation, no external rear I/O board

6. Compatible Devices

7. Key Features

• Integrated internal terminal design, without external rear I/O board

• 4-channel universal sensor input and 4-20mA output

• Compact structure, simple wiring and easy maintenance

• Built-in filtering and anti-interference circuit

• Cost-effective for ordinary non-hazardous industrial area

8. Critical Difference Comparison (Most Important)

• 140471-01: Internal termination (No rear board), ordinary standard 42M, common power plant version.

• 133323-01: External rear termination (With rear board), separated wiring structure.

• 135489-01: Intrinsic safety barrier, hazardous area explosion-proof version.