Brand: Shinkawa

Shinkawa VM-704B/CS1/TB1/L02 Vibration Monitor

Name: Shinkawa VM-704B/CS1/TB1/L02 Vibration Monitor – Datasheet
Brand: Shinkawa

Description

Overview

The Shinkawa VM-704B/CS1/TB1/L02 vibration monitor belongs to the Shinkawa VM series, providing continuous vibration monitoring and protection for rotating machinery. The monitor conditions the sensor signal, compares the level with the alarm setpoints and operates the alarm and trip relays when the machine vibration exceeds the limit. The configuration code identifies the cable, terminal and option set for the installed channel, and the monitor is supplied with the matching sensor as a complete system.

The VM-704B channel is ordered complete with the cable and terminal configuration of the part number, and the monitor is verified against the installed set before shipment. The alarm and trip functions are set independently during commissioning, and the DC output feeds the recorder or the DCS for continuous trending. The measured values are cross-checked with the portable data collector during the periodic verification of the protection channel.

Engineering and Design

The VM-704B accepts the signal from the vibration sensor installed on the bearing housing and produces a conditioned DC output proportional to the measured vibration. The alarm and trip functions are set independently, so the machine can give a warning before the shutdown limit is reached. The relay outputs are wired into the machinery protection circuit and the DC output feeds the recorder, the DCS or the portable data collector for trend analysis.

The suffix codes in the part number define the input cable length and the terminal block arrangement used in the specific installation, and the monitor is checked against the machine train configuration before shipment. The VM series follows the Shinkawa design with rack or panel mounting, outline drawings and wiring diagrams available from the manufacturer. Legacy Shinkawa systems in the region are supported by this spare channel, keeping the installed protection scheme operational.

The VM-704B channel follows the standard installation practice: the sensor cable is routed from the machine to the monitor input, the relay outputs are wired into the protection circuit, and the DC output feeds the recorder or the DCS. The alarm and trip setpoints are adjusted independently during commissioning, so the warning threshold can be set below the shutdown limit. The monitor is tested with the simulated signal before the machine is started, and the measured values are compared with the portable data collector readings during the initial verification. The suffix codes of the part number define the cable length and the terminal block arrangement, so the channel is ordered complete and ready for installation. Shinkawa supports the legacy VM series through the discontinued products channel, and the outline drawings and wiring diagrams are available from the manufacturer. The spare channel is verified against the installed configuration before shipment. For plants that operate a Shinkawa monitoring system, the VM-704B provides a reliable spare channel that keeps the protection scheme operational while the failed unit is repaired. The channel is commissioned by the instrument technician and the setpoints are recorded in the plant log. The monitor is supplied in the rack or panel format of the VM series for the control room installation. The spare is kept in stock for the machines where the channel is part of the protection scheme.

Key Features

Continuous vibration monitoring channel
Independent alarm and trip setpoints
DC output for DCS, recorder or data collector
Rack or panel mounting
Supplied with matching sensor
Part of Shinkawa VM series

Applications

The VM-704B is used on turbines, compressors, pumps and large motors in power plants, oil and gas facilities and industrial plants where bearing housing vibration is monitored for protection and diagnostics.

Specifications

Product line

Shinkawa VM seriesnType: vibration monitornModels: VM-704B with CS1/TB1/L02 optionsnInput: vibration sensor signalnOutputs: alarm, trip, DC signalnMounting: rack or panelnManufacturer: Shinkawa Electric Co., Ltd.

Why Seven Star LLC

Seven Star LLC supplies Shinkawa VM series monitors to reliability teams across Oman and the GCC. Every part number is checked before your order is confirmed, and our team helps you match the monitor and sensor configuration to your existing channel.

The L02 suffix on the VM-704B/CS1/TB1/L02 identifies a specific cable-length option, and we confirm this against your actual sensor-to-monitor run distance before an order is placed, since ordering the wrong cable length on a legacy Shinkawa channel typically means field-splicing at the terminal block rather than a clean drop-in replacement. We also help plants that cross-check their protection channels with a portable data collector confirm the monitor DC output scaling matches what the collector software expects, avoiding a trending discrepancy that could otherwise be mistaken for a genuine change in machine condition.

Keeping Legacy Protection Channels Documented

Where the original commissioning records for a VM-704B channel are incomplete or have been lost over years of plant ownership changes, our team can help reconstruct the setpoint history from the recorder trend data and the current relay wiring, giving your reliability engineer a documented baseline to work from before the next setpoint review rather than relying on undocumented tribal knowledge passed between technicians.

Also available: SHINKAWA VM-5Y1-02/IS0 Relay Module

Request a Quote for Shinkawa VM-704B/CS1/TB1/L02 Vibration Monitor

Submit a formal inquiry through our RFQ page with the VM-704B part number and your sensor configuration. We will confirm the matching channel and respond with a formal quotation. | Inquiry Form

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About brand

Turbine and compressor trains in many Asian-built power and process plants are protected by Shinkawa vibration monitoring. Shinkawa Electric Co., Ltd. of Tokyo makes eddy current displacement transducers, vibration sensors and rack-based monitors for rotating machinery. Seven Star LLC lists Shinkawa VM-5 and VM-700 series monitor modules, sensors and converters, and sources them by full model code for machinery protection systems in Oman.

Shinkawa company profile

Roots	1927. Incorporated as Shinkawa Electric Co., Ltd. in 1951
Head office	Chiyoda, Tokyo, Japan
Sensors	Displacement and vibration transducers made since 1977. Development and manufacture are at Shinkawa Sensor Technology (founded 1994) in Hiroshima
Product families	Eddy current proximity probes with drivers (converters), velocity and acceleration sensors, LVDTs, and machinery protection monitors and condition monitoring systems
Typical machines	Steam and gas turbines, generators, centrifugal compressors, large pumps and fans

Milestones

1927: The business that became Shinkawa starts in Japan.
1951: Incorporated as Shinkawa Electric Co., Ltd.
1977: Displacement and vibration transducers are first made.
1994: Shinkawa Sensor Technology is founded in Hiroshima for sensor development and manufacture.

Shinkawa monitors and sensors listed

Series	Function	Listed models
VM-5 rack	Machinery protection monitor system	VM-5K dual vibration, VM-5T thrust position, VM-5S tachometer, VM-5F temperature, VM-5P3 phase marker
VM-5 system modules	Relays, power, rack and communication	VM-5Y1 and VM-5Y7 relays, VM-5Z1 power supply, VM-5W1 rack, VM-53 communication
VM-700 series	Compact stand-alone vibration monitors	VM-701B, VM-704B, VM-741B, VM-751B1
VK series (VL model codes)	Eddy current displacement sensors	VL-202A08R, VL-452A11A
Converters	Probe drivers and signal converters	2M04-500

Shinkawa's current catalog also shows the FK transducer series and the VM-7 monitor. This matters when an older part has to be matched with a present-day equivalent.

How a Shinkawa protection chain works

An eddy current probe sits a set distance from the shaft. Its driver (converter) turns the gap into a voltage, and the monitor turns that voltage into vibration, thrust position or speed values with alert and danger set points. The probe, extension cable and driver are calibrated together for one total system length and one target material, usually AISI 4140 shaft steel. Changing one part without matching the other two shifts the calibration. The monitor relays feed the turbine or compressor trip logic, and buffered outputs go to analysis systems. Many protection systems of this kind are specified to API 670.

Where Shinkawa vibration monitoring is used

Shinkawa systems measure shaft vibration, axial (thrust) position, speed, phase reference and bearing temperature on steam turbines, gas turbines, generators, compressors, pumps and fans. In the GCC they are found mainly in power stations, desalination plants, refineries and petrochemical units with Japanese or Korean machinery packages.

Ordering Shinkawa parts: what we need

Shinkawa model codes are long and every field counts. A monitor code such as VM-5K-411512-000-000-111-0/IS0/EX5 defines the input type, range, options and suffix codes, so copy the complete string from the module label, including everything after the slashes. For sensors, send the VL or FK model code, probe tip diameter, cable length and the matching driver or converter model, since the probe, extension cable and driver work as a calibrated set. A serial number and a photo of the label help us confirm the item in the manufacturer's documentation. Where a model is no longer produced, we propose the successor the manufacturer names.

Facts checked against Shinkawa Electric company information and product documentation, October 2026.

Browse Shinkawa products by category: Vibration.

FAQ

Questions about the Shinkawa VM-704B/CS1/TB1/L02 Vibration Monitor

Answers from our engineering team on installation, compatibility and integration.

01What is the Shinkawa VM-704B?

It is a vibration monitor of the Shinkawa VM series that conditions the sensor signal and provides alarm, trip and DC outputs for machinery protection and diagnostics.

02Which machines is it used on?

Pumps, fans, compressors, turbines and large motors in power, oil and gas and industrial plants.

03How are the alarm and trip functions set?

The setpoints are set independently, so the machine gives a warning before the shutdown limit is reached.

04What is the DC output used for?

It feeds the recorder, the DCS or the portable data collector for trend analysis of the vibration level.

05What do the suffix codes mean?

The CS1, TB1 and L02 codes define the cable length and terminal block arrangement of the installed channel.