Shinkawa VM-7 Series VM-703B Speed/Eccentricity Monitoring Module
VM-703B is a speed and eccentricity monitoring module for the Shinkawa VM-7 series TSI system in Japan. It is installed in the VM-761B rack slot and supports magnetic electric speed probes and eddy current probes to measure rotor speed, acceleration, steering, and shaft eccentricity.
Function: Receive speed probe signals, collect unit speed, acceleration rate, and rotation direction, and achieve overspeed, low-speed, and zero speed protection; Receive eddy current probe to collect shaft eccentricity (shaft bending) data; Output relay alarm contacts and 4-20mA analog signals, and send speed and eccentricity values to the DCS/ETS system; Provide phase marker signals for phase synchronization in the vibration analysis module; Equipped with probe wire breakage detection, providing speed protection and rotor bending status monitoring basis for rotating machinery of steam turbines and compressors
Parameter Specifications
| Parameter | Value |
|---|---|
| Model | VM‑703B |
| Product family | VM‑7 Series TSI System |
| Module type | Tachometer & Eccentricity monitor module |
| Speed input channel | 2 channels |
| Eccentricity input channel | 1 channel |
| Speed sensor type | Magnetic pickup / Proximity probe |
| Eccentricity sensor type | Eddy‑current probe FK‑202F series |
| Speed measuring range | 0‑5000 rpm |
| Eccentricity measuring range | 0‑100 μm p‑p |
| Analog output | 4‑20 mA |
| Relay alarm output | Alert / Danger relay contact |
| Alarm delay | 0‑99 s configurable |
| Power supply | Supplied by rack backplane 24 V DC |
| Mounting | VM‑761B chassis hot‑swap slot |
| Operating temperature range | 0 ~ +65 ℃ |
| Storage temperature range | ‑20 ~ +70 ℃ |
| Relative humidity | 5‑95% non‑condensing |
| Dimension(W×H×D) | 45 ×120 ×210 mm |
| Weight | 0.68 kg |
| Origin | Japan |
| Optional suffix | /TB1, /NB1, /TRP |
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Product features
- Dual port RJ45 Ethernet interface, Modbus TCP industrial Ethernet protocol, can simultaneously interface with DCS systems and diagnostic PCs without the need for additional hardware conversion.
- The backplane bus of the rack collects data from all monitoring modules of the rack, and a single communication module can read all measurement point data from up to 11 monitoring boards in the entire rack.
- Support hot swapping, replacing modules in the cabinet without power on does not affect the continued protection and alarm functions of other vibration monitoring modules.
- Support PC based MCL View diagnostic software, which can read vibration waveforms online, modify module parameters, view historical alarms, and trace faults, facilitating unit maintenance and debugging.
- The panel LED indicator light intuitively displays the module operation, network link, and backplane bus communication fault status, facilitating quick on-site troubleshooting.
- The B1-5 version is a dedicated configuration version with a fixed protocol register layout, which is directly compatible with existing DCS point tables in existing power plants and petrochemical projects. Replacement of spare parts does not require modification of the upper level program.
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