JUXTA VJ Series Signal Conditioners

Compact size, plug-in style and microprocessor based high performance capabilities (Multi-function types) makes the VJ Series an excellent choice for almost every application. Analog output, Hi-Low alarm relay outputs or RS-485 MODBUS communication is available as optional second output. Various parameters such as input range and computation programs can be set and modified using a PC (VJ77) .

Compliant with safety standards (CE, UL, CSA), HART communication, 3 years warranty


  • Compact design for space saving.
    The external dimensions are 76 H×29.5 W×124.5 D (mm).
  • Power supply voltage is either 100 to 240 V AC or 15 to 30 V DC.
  •  The standard withstand voltage : 2000 V AC
    Between Input - Output - Power - Ground
  • Two isolated outputs*
    Second isolated current or voltage (pulse) output is available as optional feature.
  • Communication function*
    Optional MODBUS (RS-485) communication function can be obtained simultaneously with analog output signal from one VJ.
  • Alarm outputs*
    Bi-directional relay of HART communication signals is possible while the field devices and the DCS are isolated from each other.
  • Field configuration*
    If you have a computer with the VJ77 parameter setting tool installed, you can set up the microcomputer-based VJ on site.
  • Three years warranty*
  • Supports overseas safety and EMC standards (CE, UL, CSA, etc.)*
  • Universal input
    You can configure the VJU7 Temperature Converter for input from thermocouples, RTDs, or mV signals.
  • HART communication signal relay function (VJA1/H, VJH1/HC)
    You can perform HART communication between field devices and DCS that have the HART function (isolated between input and output).
  • Output open detection function (VJH1/C, VJH1/HC)
    Enables detection of the open state of an isolated load circuit with the input device.

* For details on supported models, see --> “Model list” .

Mounting and Appearance

Construction Compact plug-in type (Main unit with Socket)
Mounting Method: Wall, DIN rail, or dedicated VJ mounting base mountings
Connection Method: M3 screw terminal
External Dimension: Converters: 76×29.5×124.5 mm (H×W×D)
VJCE Base: 130×482.6×121 or 177×482.6×121 mm (H×W×D)

Model List

Signal Conditioners

Product Name Model Output type Field
Conformity Standards(*2)
Alarm or
Isolator Standartd Type VJH1 - - - (*5)

Multi-function VJH7 (*5)
Super Speed Response Type VJHF - - -           (*4)  
Reverse Output Type VJHR - - - (*5)
Loop Powered Isolator VJC1 (*3) - - -              
Distributor Standartd Type VJA1 - - - (*5)
HART Communication VJA1/H - - - (*5)
Multi-function VJA7 (*5)
Square Root Extractor VJA5 - - - (*5)
Non-isolated VJA4 (*3) - - - (*5)
RTD Converter Standartd Type VJR6 - - - (*5)
Thermocouple Converter Standartd Type VJT6 - - - (*5)
Universal Temperature Converter Multi-function VJU7 (*5)
CT Converter(RMS) VJB1 - - - - (*5)
PT Converter(RMS) VJG1 - - - - (*5)
AC Converter(RMS) VJB3 - - - (*5)
Tachogenerator Converter VJD1 - - - (*5)
Potentiometer Converter Multi-function VJS7 (*5)
Pulse Rate Converter Standartd Type VJP4 - - -           (*4) (*4)
Multi-function VJP8 -     (*4) (*4) (*4) (*4)
Pulse Repeater VJP1 - -             (*4) (*4)
Pulse to Analog Converter Multi-function VJQ8     (*4) (*4) (*4) (*4)
Analog to Pulse Converter Standartd Type VJQ0 - - -           (*4) (*4)
Multi-function VJQ7     (*4) (*4) (*4) (*4)
High/Low Signal Selector VJSS - -           (*4) (*4)
Pneumatic to Electric Converter VJF1 - - - -           (*4) (*4)
Ethernet/RS-485 Converter VJET - - -       (*4) (*4) (*4) (*4)
Input/Output Through Card X069 - - - - N/A N/A N/A N/A
Setting Tool VJ77 - - - -   N/A N/A

√: Models that support, comply with, or are certified for various standards
- : Unsupported product
Blank : Will support in the future
N/A : Products not applicable to the standard

*1: The aluminum electrolytic capacitor–free design provides longer life (15 to 30V DC power supply only) / Wider range of operating temperatures (-10 to 55°C)
*2: May not conform to various standards depending on some specifications. For details, see the respective product specifications.
*3: Can select 2 channels in one unit
*4: Complies with low voltage only (15–30 V DC power supply specifications only)
*5: Obtained UL compliance through CSA testing and verification


VJ Mounting Base

Model Product Name Descriptions
VJCE VJ Mounting Base The multiple mounting base for VJ Series, mixed and housed up to 16 converters, JIS/EIA standards rack-mounting dimensions.



Taking advantage of sensors already available in your system, you can simply add VJ series signal conditioners or the UM33A Digital Indicator with Alarms to easily build a monitoring system on a PC.


Load devices are sometimes used when evaluating (measuring) DUT performance. Depending on the parameter being evaluated, multiple controllers can be employed to control the performance of the load device, but there are also times when the load device uses only one actuator. 


With advances in process automation comes a greater need for level measurement and control. As pressure on at the bottom surface of a liquid is proportional to the height of the liquid's surface, you can measure pressure using a differential pressure transmitter to detect the level of the liquid, acquire the data on the UT75A Digital Indicating Controller, and use the measurements to control the tank level.

  • Effeciently controls the inlet valve and blow-off valve when the compressor starts and stops.
  • During steady operation, controls the inlet valve so that the amount of discharged compressed air becomes constant (flow control)
  • Surging: Load decreases, the amount of discharge flow and pressure drop, and a limit is exceeded, possibly destroying the compressor.

HART communication is a means of transmitting multiple signals by superimposing long-standard 4-20 mA DC analog signals on digital signals. The figure below is an example of connecting field instruments and upstream devices using HART communication compatible VJA1/H signal conditioners.


This introduces use of a contact input multiplication/addition computing unit that employs a user program of the MXT computing unit (XJJM.507) on fluid mixture and other calculated measurement outputs from flow meters. The figure below shows examples of connecting various field instruments to an upstream system.

Sprawozdania techniczne Yokogawy

Many signal conditioners have been used on the input and output sections of large-scale distributed control systems (DCSs) for isolation purposes. Recently personal computer-based instrumentation and measurement systems have become popular and brought with them significant functional enhancements.

Can I change the burnout operation?
Can I change the range on the MQ0?
Can I change the range on the VJT6?
How do I change settings?
What are the merits of plugin conditioners?
What does response speed **ms(10-90%) mean?
What does "time constant" mean?
What is the output on burnout?
What happens on a "burnout OFF"?
Please provide information about PCB usage.


Instrukcje obsługi
Ogólne specyfikacje

Szukasz dodatkowych informacji na temat naszych pracowników, technologii i rozwiązań?