Brand: Shinkawa

Shinkawa VM-742B1-1/CS1 Vibration Monitor

Name: Shinkawa VM-742B1-1/CS1 Vibration Monitor – Datasheet
Brand: Shinkawa

Description

Overview

The Shinkawa VM-742B1-1/CS1 vibration monitor belongs to the Shinkawa VM series, providing a continuous vibration monitoring channel for rotating machinery. The monitor conditions the signal from the vibration sensor and operates the alarm and trip outputs when the measured level exceeds the setpoints, while the DC output carries the live vibration value to the recorder or the DCS. The B1-1 and CS1 codes define the specific monitor and cable configuration of the channel.

The VM-742B1-1 monitor channel is installed with the sensor cable and terminal configuration defined by the part number, and the setpoints are adjusted during commissioning to the machine train. The relay outputs feed the protection circuit and the DC output carries the live vibration value to the trending system. The measured values are cross-checked with the portable data collector during the periodic verification of the channel.

Engineering and Design

The VM-742B1-1 receives the sensor signal, filters and conditions it, and compares the vibration level with the independently adjustable alarm and trip setpoints. The relay outputs are wired into the protection circuit of the machine, giving a fast shutdown response on excessive vibration. The DC output is proportional to the vibration amplitude and is used for trending and for cross-checks with the portable data collector.

The CS1 suffix identifies the cable configuration between the sensor and the monitor, so the channel is ordered complete and ready for installation. The monitor is verified against the Shinkawa configuration before shipment and is mounted in the control cabinet following the VM series practice. For plants operating Shinkawa condition monitoring systems, this monitor provides a drop-in spare channel with the original outline drawings and wiring diagrams available from the manufacturer.

The VM-742B1-1 channel is installed with the sensor cable routed from the bearing housing to the monitor input, and the relay outputs are wired into the protection circuit of the machine. During commissioning the alarm and trip setpoints are adjusted to the machine train, and the verification is recorded in the commissioning report. The DC output feeds the recorder or the DCS for continuous trending, and the measured values are cross-checked with the portable data collector during the initial verification. The monitor is powered from the plant supply and is tested with the simulated signal before the machine is started. The CS1 suffix of the part number defines the cable configuration, so the channel is ordered complete and ready for installation. Shinkawa supports the legacy VM series through the discontinued products channel with the original documentation. The spare channel is verified against the installed configuration before shipment, including the cable length and the terminal arrangement. Plants that operate a Shinkawa monitoring system keep the VM-742B1-1 as a drop-in spare, which shortens the repair time and keeps the protection scheme operational. 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. The analog output scaling is checked against the sensor calibration during the verification.

Key Features

Continuous vibration monitoring channel
Alarm and trip setpoints
DC output for trending and DCS
Complete with cable configuration
Rack or panel mounting
Part of Shinkawa VM series

Applications

The VM-742B1-1 is used on compressors, pumps, fans and motors, and on turbine auxiliary trains in power, oil and gas and general industrial plants where bearing vibration must be monitored continuously.

Specifications

Product line

Shinkawa VM seriesnType: vibration monitornModels: VM-742B1-1 with CS1 optionnInput: 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 and maintenance 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 cabling to your existing channel.

The VM-742B1-1/CS1 is commonly applied to auxiliary and balance-of-plant rotating equipment, compressors, pumps, fans and turbine auxiliary trains, rather than the main turbine itself, so we confirm which specific machine the channel is protecting before recommending a configuration, since the practical difference between a main-train and an auxiliary-train monitoring channel is not always obvious from the part number alone. For plants with several auxiliary machines sharing similar monitoring channels, we help build a spares list that covers the actual population of installed VM-742B1-1 units rather than assuming every auxiliary channel on site is identical.

Reliable Cabling and Configuration for Auxiliary Channels

The CS1 cable configuration on the VM-742B1-1 is matched to a defined sensor interface, and we verify this against the sensor already installed on your auxiliary machine before an order ships, since a cable mismatch on a lower-priority auxiliary channel is often deprioritized for repair once discovered, quietly leaving that machine without functioning vibration protection for longer than the plant intended.

Request a Quote for Shinkawa VM-742B1-1/CS1 Vibration Monitor

Submit a formal inquiry through our RFQ page with the VM-742B1-1 part number and your machine 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-742B1-1/CS1 Vibration Monitor

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

01What is the Shinkawa VM-742B1-1?

It is a vibration monitor of the Shinkawa VM series providing a continuous vibration monitoring channel with alarm, trip and DC outputs.

02Which machines is it used on?

Compressors, pumps, fans and motors and turbine auxiliary trains in power, oil and gas and industrial plants.

03How are the setpoints adjusted?

The alarm and trip setpoints are independently adjustable to match the protection philosophy of the machine train.

04What is the DC output used for?

It carries the live vibration value for trending, recording and cross-checks with the portable data collector.

05What does the CS1 code mean?

It identifies the cable configuration between the sensor and the monitor, so the channel is ordered complete.