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, VJH1/HC), Bi-directional relay of HART communication signals is possible while the field devices and the DCS are isolated from each other.
  • The load circuit open detection function (VJH1/C, VJH1/HC) is ideal for detecting the open state of an isolated load circuit with the input device.
  • 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.
  • Compliant with safety standards (CE, UL, CSA). * For some models only. For details, see "Specifications".

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
Isolated
Dual-output
RS-485
Communication
Alarm
(relay)
UL RECOGNITION MARK CSA CSA CE mark
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.

Overview:

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.

Overview:

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. 

Overview:

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.

Industrias:
Overview:
  • 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.
Overview:

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.

Overview:

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.

Overview:

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.

The open collector needs a power supply. Use one within the maximum allowable load. ...
As our lightning arresters are not explosion proof, they cannot be used in the configuration of instruments you described.
The black knob on the front panel is the screw that secures the main unit. Turn it counterclockwise to loosen, then remove the unit.
We have pulse repeaters such as the VJP1, and VJP8.
Because the RS-485 communication on output 2 is reserved for I/O or error status monitoring, it cannot be used to write parameters.
Yes. Wire it without using the included resistor.
JUXTA VJ series is not a CCC standard scope. Some models of the VJ series have acquired GB standard and can be used in China. Please contact us for applicable models. ...
A distributor for the V series (VJA1/H), and a distributor (DA7) and isolator (DC7) for the D series are available.
Using a first-order lag or moving average computing unit helps suppress noise. You can use the following for this: M series plug-in type signal conditioners, VJ series compact plug-in type units, or F/W series front panel terminal type computing unit...
You can do this with a limiter or broken-line approximation function. You can use the following for this: M series plug-in type signal conditioners, VJ series compact plug-in type units, or F/W series front panel terminal type computing units. The br...
As the orientation affects heat dissemination, it cannot be horizontal.
It is shipped with factory default settings. Alarm types and values should be set by the user with a handy terminal or the VJ77 parameter setting tool.
Check the power supply wiring. Check whether the power supply voltage meets the specifications. Check the polarity of the input wiring. Use a tester to measure the input terminal voltage. For current input specifications, confirm that the acces...
Resistors come with isolators that have terminal block format current input specifications. Please attach it to the input terminals before use.
Yes. To satisfy the performance specifications, you should power the unit for 10–15 minutes.
Please provide information about PCB usage.
(ns-faq-juxta-11068-other)
PCBs were banned from manufacturing and imports in 1975. JUXTA was first released in 1987, therefore they should not include PCBs.
Check the power supply wiring. Check whether the power supply voltage meets the specifications. Check the polarity of the input wiring. Check the pulse specifications of the other instrument. For voltage pulse, open collector, and non-voltage c...
Check the power supply wiring. Check whether the power supply voltage meets the specifications. Check the polarity (+), (-) of the input wiring. Use a tester to measure the input terminal voltage. For current input specifications (applies to the...
Check the power supply wiring. Check whether the power supply voltage meets the specifications. Check the polarity of the input wiring. Measure the voltage between the input terminal (-) and COM. The normal range is 1–5 VDC. Measure the v...
Check the power supply wiring. Check whether the power supply voltage meets the specifications. Confirm that the accessory RJC sensor is connected to the input terminal. Short the input terminals, then confirm that the output is equivalent to th...
Check the power supply wiring. Check whether the power supply voltage meets the specifications. For Pt100 input specifications, connect a 100 Ω resistance between input terminals A and B, short the B terminals, then confirm that the output ...
Check the power supply wiring. Check whether the power supply voltage meets the specifications. Check the polarity of the input wiring. Check the pulse specifications of the other instruments. For voltage pulse, open collector, and non-voltage ...
Short with a 250 Ω resistor (rated power of 0.25 W or more). If you don't have a resistor, a simple short is fine.
It is with plug-in types. It is also sold separately.
What are the merits of plugin conditioners?
(ns-faq-juxta-11007-select)
They have the following advantages: Because you can separate the conditioner from the socket, panel work can proceed even without the conditioner. You can remove or replace the conditioner simply by plugging a new one in, so maintenance is easy. ...
The resistance is 250 Ω (4–20 mADC). However some computing units also have 100 Ω input.
You specify it for current pulse input. The resistance you specify depends on the specifications of the transmitter (mainly the rated current of the open collector). The internal load resistances are 200 Ω, 500 Ω, and 1 kΩ, and 0.5 ...
For example, if the specification of the open collector on the output side is 30 V/30 mA, use an internal load resistance of 1 kΩ (with a 24 V transmitter power supply). This results in a 0/24 mA current pulse.
How do I change settings?
(ns-faq-juxta-11006-setting)
Using the following settings tool, you can change the settings listed in the user's manual that came with the conditioner. Handy Terminals JHT-100 and JHT-200 BRAIN terminal BT200 (requires cable, sold separately) VJ77 Parameter Setting Tool...
Can I change the range on the VJT6?
(ns-faq-juxta-11005-spec)
No, you can't change the range after purchase. The compact VJU7 model does allow you to change ranges, but this requires a setting tool that is sold separately.
Can I change the burnout operation?
(ns-faq-juxta-11001-spec)
This is possible if it is a microprocessor type converter. You will need a handy terminal to make the change. (VJR6, VJT6, VJS2, MR6, MT6, MS2, and others cannot be changed.)
F and W series: dedicated 3-pin cable D series: dedicated 5-pin cable VJ, J, and M series computation unit: 5-pin cable + modular conversion (E9786WH, sold separately).
If it is a model that allows range changes, it is possible just like from a JHT200. However, the type of cable is different from the one that comes standard, so you will need to purchase another cable. 3-pin cable: model F9182ED 5-pin cable: model F9...
Can I change the range on the MQ0?
(ns-faq-juxta-11004-spec)
No, you can't change the range after purchase. The compact VJQ7 model does allow you to change ranges, but this requires a setting tool that is sold separately.
It’s model T9093FL. The VJ socket is built with holes for screws that prevent falling off, therefore an Omron socket cannot be used.
IPTS-68: This is an international standard from 1968 where R100/R0=1.3850 that was used by the JIS from 1989 to 1997, but currently it is not in use. ITS90: An international standard from 1990 where R100/R0=1.3851, and used by the JIS from 1997 to th...
What is the output on burnout?
(ns-faq-juxta-11023-spec)
When UP, 106% of the output range or more; when DOWN, -6% or less.
What happens on a "burnout OFF"?
(ns-faq-juxta-11024-spec)
When input is interrupted it reaches ±OVER, but which of these is uncertain.
The F series has 30 steps. The W series has 40 steps. The M/VJ series has 59 steps.
On the M series you can select 50, 100, or 200 ms. On the F, W, and VJ series you can select 100 or 200 ms. (The VJXS can support 50 ms.)
The input impedance of typical voltage input type instruments is 1 MΩ. By contrast, the allowable load impedance for voltage output is 2 kΩ or more, therefore the maximum number of units that can be connected is 500.
The total resistance ≥ zero side resistance + span resistance.
The input impedance of typical current input type instruments is 250 MΩ. By contrast, the allowable load impedance for current output is 750 kΩ or more, therefore the maximum number of units that can be connected is 3.
What does "time constant" mean?
(ns-faq-juxta-11021-term)
In the case of conditioners, time constant reflects the response speed. In terms of a transfer function, it is expressed as OUT=INΩ(1-e EXP(-t/T)). OUT: output, IN: input, e: natural log, T: time constant, t: elapsed time When the elapsed time...
What does response speed **ms(10-90%) mean?
(ns-faq-juxta-11019-other)
It means the time until the output reaches 63% when input is applied in 10 Ω 90% steps.
A 90% response time is equivalent to 2.3 times the duration of a 63% response time.
You can download these items from the Partner Portal member site *Log-in Required. You must register (free) to use Partner Portal.
The part number for the VJ series Juxta base (socket) is a T9093FL.
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