描述
一、产品概述
BENTLY 3500/42M 140734-02是Bently Nevada（现为通用电气旗下品牌）开发的四通道振动与位置监测模块，属于3500系列机械保护系统的核心组件。它专为工业旋转机械（如汽轮机、压缩机、电机等）的振动、位移、差胀等参数监测设计，支持多传感器输入与智能报警功能，适用于电力、石化、冶金等高可靠性要求的场景。
二、核心功能与特点
多通道监测能力
四通道设计：每个通道可独立配置，支持成对编程实现两种功能（如径向振动+轴向位移）。
传感器兼容性：接受电涡流位移传感器、速度传感器、加速度传感器输入，覆盖振动、位移、差胀、偏心等测量需求。
智能报警与保护
报警阈值设置：通过3500框架组态软件可编程设置多级报警（预警、停机），支持满量程0%-100%范围调整。
危险阈值联动：对关键参数（如轴位移、差胀）可设置双重危险报警，触发继电器输出或系统停机。
高精度与稳定性
灵敏度范围：
径向振动：3.94 mV/μm（100 mV/mil）或7.87 mV/μm（200 mV/mil）
差胀：0.394 mV/μm（10 mV/mil）或0.787 mV/μm（20 mV/mil）
温度补偿：内置温度补偿算法，确保宽温环境下的测量精度（-40°C至85°C）。
工业级设计
冗余电源支持：可搭配冗余电源模块（如3500/15电源）实现双路供电，保障系统连续运行。
热插拔兼容：支持带电插拔，减少维护停机时间。
抗干扰能力：屏蔽设计与短路保护，适应强电磁干扰环境。
三、技术参数
参数类别规格
通道数量4通道（成对编程）
输入类型电涡流位移、速度、加速度传感器
输出信号4-20mA模拟量输出（可选）
功耗7.7W
工作电压24 V DC
通信协议支持Modbus TCP/RTU，通过3500/20接口模块实现网络通信
防护等级IP56（需配合机柜安装）
重量2.3 kg
四、典型应用场景
旋转机械监测
汽轮机、压缩机、风机、水泵的轴振动、轴位移、差胀监测。
工业设备保护
电机、齿轮箱的振动异常报警与停机保护。
过程控制集成
与DCS系统（如西门子、艾默生）对接，实现数据采集与远程监控。
1.Product Overview
BENTLY 3500/42M 140734-02 is a four-channel vibration and position monitoring module developed by Bently Nevada(now a brand under General Electric).It is a core component of the 3500 series mechanical protection system.It is designed for monitoring parameters such as vibration,displacement,and differential expansion of industrial rotary machinery(such as steam turbines,compressors,motors,etc.),supports multi-sensor input and intelligent alarm functions,and is suitable for scenarios with high reliability requirements such as electricity,petrochemicals,and metallurgy.
2.Core functions and features
Multi-channel monitoring capability
Four-channel design:Each channel can be configured independently,supporting paired programming to achieve two functions(such as radial vibration+axial displacement).
Sensor compatibility:accepts inputs from eddy current displacement sensors,velocity sensors,and acceleration sensors,covering measurement requirements such as vibration,displacement,differential expansion,and eccentricity.
Intelligent alarm and protection
Alarm threshold setting:Multi-level alarm(early warning,shutdown)can be programmed through the 3500 framework configuration software,supporting 0%-100%range adjustment for full scale.
Hazard threshold linkage:A double hazard alarm can be set for key parameters(such as axis displacement,differential expansion)to trigger relay output or system shutdown.
High precision and stability
Sensitivity range:
Radial vibration:3.94 mV/μm(100 mV/mil)or 7.87 mV/μm(200 mV/mil)
Differential expansion:0.394 mV/μm(10 mV/mil)or 0.787 mV/μm(20 mV/mil)
Temperature compensation:Built-in temperature compensation algorithm ensures measurement accuracy(-40°C to 85°C)in wide temperature environments.
Industrial design
Redundant power supply support:It can be equipped with redundant power modules(such as 3500/15 power supply)to achieve dual power supply to ensure continuous operation of the system.
Hot-swap compatibility:supports live plug-in and unplug to reduce maintenance downtime.
Anti-interference ability:shielding design and short-circuit protection to adapt to strong electromagnetic interference environment.
3.Technical parameters
Parameter Category Specifications
Number of channels 4 channels(pair programming)
Input type Eddy current displacement,velocity,acceleration sensor
Output signal 4-20mA analog output(optional)
Power consumption 7.7W
Operating voltage 24 V DC
Communication protocol supports Modbus TCP/RTU,and realizes network communication through 3500/20 interface module
Protection level IP56(need to be installed with the cabinet)
Weight 2.3 kg
4.Typical application scenarios
Rotary machinery monitoring
Monitoring of shaft vibration,shaft displacement and differential expansion of steam turbines,compressors,fans and water pumps.
Industrial equipment protection
Vibration abnormal alarm and shutdown protection of motors and gearboxes.
Process control integration
Docking with DCS systems(such as Siemens and Emerson)to realize data acquisition and remote monitoring.
