Product Overview

• PN: 3500/50 supporting rear I/O part No.133442-01
• Brand: Bently Nevada (Baker Hughes)
• Series: 3500 Turbomachinery Protection TSI System
• Type: Tachometer Module Internal Termination Rear I/O Unit
• Function: Dedicated rear wiring accessory with integrated terminal blocks for 3500/50 speed measurement front module. It directly connects field speed sensors, transmits pulse signals to the front board for rotating speed calculation, and distributes conditioned Keyphasor phase reference signal to rack backplane for vibration phase analysis of all other monitoring channels. It supports zero-speed alert, overspeed alarm, reverse rotation detection and acceleration monitoring, and hardwires alarm interlock signals to external control systems without extra external terminal adaptersBaker Hugh...。

Core Features

• Integrated pluggable terminal block design, no need for separate external termination modules and connecting cables
• Two independent signal input loops for dual-channel speed signal acquisition
• Built-in circuit protection against surge, short circuit and wiring reverse connection to avoid front card damage
• Distributes standardized Keyphasor timing signal across rack backplane to replace independent Keyphasor module
• Peak value locking function records maximum rotating speed and reverse rotation records for equipment troubleshooting
• Modular hot pluggable under redundant rack power supply, no full rack power cut during replacement
• PCB conformal coating treatment, anti-damp, anti-dust and anti-electromagnetic interference for cabinet working environment
• Matches front card one-to-one, no configuration mismatch after direct insertion into corresponding rack rear slot

Technical Specifications

• Supported Input Sensors: 3300XL proximity probes, passive magnetic pickup speed sensors
• Max Input Frequency: 20kHz
• Full Scale Speed Range: 0~99999 RPM
• Operating Temperature: -40℃ ~ +85℃
• Overall Dimension: 241.3 × 24.4 × 163.1 mm
• Net Weight: 0.46 kg
• HS Code: 8538900000
• Certifications: CE, UL
• Product Status: OEM discontinued production; brand new original sealed and fully inspected refurbished modules available

Compatibility

• Mandatory Matching Front Module: 3500/50 & 3500/50M tachometer monitor front card
• Applicable Chassis: All 3500/05 12-slot and 14-slot standard rack frames
• Compatible System Software: 3500 rack configuration tool, Bently Nevada System 1 predictive maintenance platform
• Incompatible Usage: Cannot be matched with external termination type rear I/O boards, nor adapt to 3500/53 overspeed protection module

Application

• Rotating speed monitoring and phase reference signal output for steam turbines, gas turbines and compressors in power and petrochemical industries
• Zero-speed standby protection, reverse rotation prevention and startup acceleration monitoring for large rotating units
• Wiring termination and signal distribution for 3500 system speed measurement loops, spare replacement for old monitoring cabinets