Brand: Shinkawa

Shinkawa VM-751B1/NB1/TRP Vibration Monitor

Name: Shinkawa VM-751B1/NB1/TRP Vibration Monitor
Brand: Shinkawa

Description

Overview

The Shinkawa VM-751B1/NB1/TRP vibration monitor belongs to the Shinkawa VM series and is used for continuous vibration monitoring of rotating machinery. The monitor conditions the sensor signal, compares the level with the alarm setpoints and operates the alarm and trip relays of the protection circuit, while the DC output provides the live vibration value for the recorder and the DCS. The NB1 and TRP codes define the terminal and option configuration of the channel.

The VM-751B1 channel is configured with the terminal block and option codes of the part number, and the monitor is verified against the installed set before shipment. The alarm and trip setpoints are adjusted during commissioning, and the DC output provides the live vibration value for the recorder and the DCS. The relay outputs feed the protection circuit, and the channel is tested with the simulated signal before the machine is started.

Engineering and Design

The VM-751B1 accepts the vibration sensor signal from the bearing housing and produces a conditioned DC output proportional to the measured level. The alarm and trip setpoints are adjustable, allowing the protection function to be tuned to the machine train. The relay outputs are wired into the shutdown circuit and the DC output feeds the trending system, so the monitor serves both protection and condition monitoring.

The suffix codes in the part number specify the terminal block arrangement and the option set for the installation, and the monitor is shipped complete with the matching configuration. Following the VM series practice, the monitor is rack or panel mounted in the control room with the wiring diagram supplied by Shinkawa. The legacy VM series is supported through the discontinued products channel, and this monitor provides a verified spare for running Shinkawa systems.

The VM-751B1 channel is installed in the control cabinet with the sensor cable routed from the machine to the monitor input terminals. The alarm and trip setpoints are adjusted during commissioning to the machine train, and the verification is recorded in the commissioning report. The relay outputs are wired into the protection circuit, and the DC output is connected to the recorder or the DCS for continuous trending of the vibration level. The monitor is powered from the plant supply and is tested with the simulated signal before the machine is started. The NB1 and TRP suffixes define the terminal block arrangement and the option set of the channel, and the spare is verified against the installed configuration before shipment. Shinkawa supports the legacy VM series through the discontinued products channel with the outline drawings and wiring diagrams. Plants that operate a Shinkawa condition monitoring system keep the VM-751B1 as a drop-in spare channel, which keeps the protection scheme operational while the failed unit is repaired and shortens the plant downtime. 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 channel is part of the protection scheme on the machines where it is fitted, and supply is on request with lead time confirmed at quotation. The analog output scaling is checked against the sensor calibration during the verification.

Key Features

Continuous vibration monitoring channel
Adjustable alarm and trip setpoints
DC output for recorder and DCS
Terminal and option configuration codes
Rack or panel mounting
Part of Shinkawa VM series

Applications

The VM-751B1 is used on pumps, compressors, motors and turbine auxiliaries in power plants, oil and gas facilities and industrial plants where continuous bearing vibration monitoring is required.

Specifications

Product line

Shinkawa VM seriesnType: vibration monitornModels: VM-751B1 with NB1/TRP 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 verifies the monitor configuration and cabling for your machine train.

The NB1 and TRP option codes on the VM-751B1 define a specific terminal block and relay configuration, and we confirm these against your existing panel wiring before an order is placed, since substituting a monitor with a different option set can mean the relay contacts do not land on the terminals your protection circuit already expects, requiring rewiring work that a correctly specified spare would have avoided entirely. We keep a record of the exact configuration codes used across your site so repeat orders for the same channel type are matched consistently over time, even when years pass between purchases.

Consistent Spares Across Multi-Year Projects

Rotating equipment protection channels are often ordered years apart, sometimes by different procurement staff who were not involved in the original installation, and a small configuration mismatch between orders can go unnoticed until the spare is already on site and does not fit the panel. We help plants avoid this by keeping a documented history of the exact VM-751B1 configuration used on each channel, so a repeat order draws on that record rather than a fresh best guess at the part number.

Request a Quote for Shinkawa VM-751B1/NB1/TRP Vibration Monitor

Submit a formal inquiry through our RFQ page with the VM-751B1 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-751B1/NB1/TRP Vibration Monitor

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

01What is the Shinkawa VM-751B1?

It is a vibration monitor of the Shinkawa VM series that conditions the sensor signal and provides alarm, trip and DC output functions for rotating machinery.

02Which machines is it used on?

Pumps, compressors, motors and turbine auxiliaries in power plants, oil and gas facilities and industrial plants.

03How are the alarm functions set?

The alarm and trip setpoints are adjustable, allowing the protection function to be tuned to the machine train.

04What do the NB1 and TRP codes define?

They specify the terminal block arrangement and option set of the channel for the installation.

05How is the legacy series supported?

The VM series is supported through the Shinkawa discontinued products channel with the original documentation.