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) or Handy Terminal (JHT200).

  • Compact design for space saving The external dimensions are 76 H×29.5 W×124.5 D (mm).
  • Universal input (VJU7) Model VJU7 temperature signal conditioner can be set as desired to accept either a thermocouple, RTD or mV signal.
  • Two isolated outputs Second isolated current or voltage (pulse) output is available as optional feature.
  • Communication function (VJU7,VJH7,VJA7,VJP8,VJQ7,VJQ8,VJS7) Optional MODBUS (RS-485) communication function can be obtained simultaneously with analog output signal from one VJ.
  • Alarm outputs (VJU7,VJH7,VJA7,VJQ7,VJQ8,VJS7) Optional Hi/Low relay alarm outputs can be output simultaneously with analog (pulse) output signal from one VJ unit.
  • Relaying HART communication signals (VJA1/H) Bi-directional relay of HART communication signals is possible while the field devices and the DCS are isolated from each other.
  • Field configuration A field configuration of the microprocessor based VJ is possible from your PC (with VJ77 PC-based parameters setting tool) or using our Handy Terminal (JHT200).
  • Power supply voltage is either 100 to 240 V AC or 15 to 30 V DC
  • Withstand voltage The standard withstand voltage for a unit of this size is 2000 V AC.
  • Three years warranty
  • Compliance with international safety standards, CE, CSA and UL CE, UL and CSA marks are available for models VJA4, VJA7, VJH7, VJP8, VJQ7, VJQ8, VJS7 and VJU7. CE mark is available for models VJA1, VJF1, VJH1, VJHR and VJ77. The above complied instruments are only for power supply voltage of 15 to 30 V DC.

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)


Signal Conditioners

Product Name Model Output type Standards
Isolator Standartd Type VJH1        
Multi-function VJH7    
Super Speed Response Type VJHF            
Reverse Output Type VJHR        
Loop Powered Isolator VJC1
(Note 1)
Distributor Standartd Type VJA1        
HART Communication VJA1/H        
Multi-function VJA7    
Square Root Extractor VJA5        
Non-isolated VJA4
(Note 1)
(Note 2)

(Note 2)
RTD Converter Standartd Type VJR6        
Thermocouple Converter Standartd Type VJT6        
Universal Temperature Converter Multi-function VJU7    
CT Converter(RMS) VJB1              
PT Converter(RMS) VJG1              
AC Converter(RMS) VJB3            
Tachometer VJD1            
Potentiometer Converter Multi-function VJS7    
Pulse Rate Converter Standartd Type VJP4            
Multi-function VJP8
(Note 2)

(Note 2)
Pulse Repeater VJP1            
Pulse to Analog Converter Multi-function VJQ8
(Note 2)

(Note 2)
Analog to Pulse Converter Standartd Type VJQ0            
Multi-function VJQ7
(Note 2)

(Note 2)
High/Low Signal Selector VJSS            
Pneumatic to Electric Converter VJF1              
Ethernet/RS-485 Converter VJET      
(Note 2)

(Note 2)

Note 1: When 2 ch type is selected.
Note 2: Applicable when the power supply is 15-30 V DC.


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.

【Support Information】List of RoHS

This is a list of recorder and controller products that support the RoHS (2011/65/EU) directive.


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.


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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.


With trends towards lowering power consumption, it has become commonplace to monitor the power consumed in offices and factories. Has it ever seemed that your office buildings and factories consume an inordinate amount of power? If so, there could be something wrong with the voltage or current of the power supply you are using, your building could be consuming too much standby power, or perhaps some equipment is being overloaded.


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In 1973 the ISA (Instrument Society of America) defined 4–20 mADC analog as the standarized signals for industrial measuring instruments, and they are still used today for transmission signals. The following are typical Yokogawa field instruments that utilize these 4–20 mADC transmission signals.


Even in the smaller scale, more diversified measuring systems that have appeared in recent years, engineers commonly need to monitor a scattering of instruments over large areas. The following is an example of using the communication functions of JUXTA VJ series signal conditioners to connect to our STARDOM network based production system.


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.

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