Product Overview

• PN: 3500/40M supporting rear I/O part No.125680-01
• Brand: Bently Nevada (Baker Hughes)
• Series: 3500 Turbomachinery Protection TSI System
• Type: Proximitor Monitor Rear Termination I/O Module

• Function: Exclusive rear wiring accessory for 3500/40M four-channel proximity monitoring front card. It provides standardized terminal ports to connect field 3300XL proximity probes, transmits probe excitation power and displacement feedback signals to the front module, and routes hardwired Alert and Danger trip alarm signals outward. It realizes centralized cable wiring without modifying rack internal backplane, greatly simplifying on-site wiring layout and later equipment maintenance work

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Core Features

• Full-height rear board structure, directly inserted into the rear corresponding slot of 3500/05 rack
• Independent terminal area for each of the four channels, clear partition to avoid signal crosstalk
• Built-in surge and short-circuit protection circuit to prevent probe wiring faults from damaging front monitor card
• Supports direct hardwire relay alarm output for interlock connection with DCS and ESD system
• Modular plug-in design, no need to disassemble the whole rack during single module replacement
• Strictly matched with 3500/40M front card, no compatibility error after one-to-one pairing

• Conformal coating on circuit board, resistant to damp, dust and electromagnetic interference in industrial cabinet environment

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Technical Specifications

• Matching Front Card: 3500/40M four-channel proximitor monitor module
• Operating Temperature: -40℃ ~ +85℃
• Overall Dimension: 241.3 × 24.4 × 241.8 mm
• Net Weight: 0.38 kg
• HS Code: 8538900000
• Certifications: CE, UL

• Product Status: OEM discontinued production; brand new original sealed and fully inspected refurbished units in stock

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Compatibility

• Mandatory Matching Device: 3500/40M front proximitor monitor main board
• Applicable Chassis: All 3500/05 12-slot and 14-slot standard rack frames
• Supported Sensors: Full series 3300XL eddy current proximity displacement probes
• External Connection: Alarm terminals connect to safety interlock system and distributed control system

• Incompatible Usage: Cannot be used with 3500/42M, 3500/44M and other model monitoring front boards

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Application

• Field signal wiring terminal for turbine, compressor and generator rotor vibration, thrust displacement and differential expansion monitoring loops
• Alarm signal outward transmission terminal of 3500 protection rack, realizing equipment safety trip interlock
• Spare replacement and wiring renovation for old 3500 series monitoring cabinets in power and petrochemical enterprises