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JUXTA VJ Series Signal Conditioners
Signal Conditioners

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

Details

  • 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
(GS)		 Output type Field
Configuration		 3-year
Warranty		 Upgrade
(*1)		 Conformity Standards(*2)
Isolated
Dual-output		 RS-485
Communication		 Alarm or
Contact
(relay)		 CE CSA UL KC RCM
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 √ √ - √ √ √ √ √ √ (*5) √ √
Pulse Repeater VJP1 √ - -   √ √ √ √ √
(*5)		 √ √
Pulse to Analog Converter Multi-function VJQ8 √ √ √ √ √ √ √ √ √ (*5) √ √
Analog to Pulse Converter Standartd Type VJQ0 √ - - -           √ (*4) √ (*4)
Multi-function VJQ7 √ √ √ √ √ √ √ √ √ (*5) √ √
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.

Resources

Application Note
Constructing a Monitoring System Using Existing Sensors
Thumbnail
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.

Industries:
Application Note
Implementing Control with a Backup Function
Thumbnail
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. 
Application Note
Tank Level Control and Monitoring in Food Manufacturing Processes
Thumbnail
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.

Industries:
Application Note
Compressor Anti-surge Control
Thumbnail
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.
Industries:
Application Note
Connect Field Instruments and Upstream Devices with HART Communication compatible Signal Conditioners
Thumbnail
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.

Industries:
Application Note
Adding Quantities of Flow Using a Signal Conditioner (Computation Unit)
Thumbnail
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.
Yokogawa Technical Report
JUXTA VJ Series Of Compact Signal Conditioners With Two Isolated Outputs
(rd-tr-r00026-009)
Thumbnail
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.

Industries:
When I connect an open collector output conditioner with a counter or relay, it doesn't work.
(ns-faq-juxta-11017-spec)
The open collector needs a power supply. Use one within the maximum allowable load. ...
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.)
How is a handy terminal (JHT200) connected to a conditioner that allows range changes?
(ns-faq-juxta-11002-setting)
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).
Is there a signal conditioner that can reverse and output the analog input?
(ns-faq-juxta-20036-select)
Yes, there is a reverse conditioner. (Ex.) VJHR
Can I change settings from a BT200 (BRAIN terminal)?
(ns-faq-juxta-11003-spec)
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.
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.
Do you have a conditioner that splits a pulse signal into 2 outputs?
(ns-faq-juxta-20038-select)
Yes, we have the following conditioners that distribute pulses into 2 outputs. (Ex) JP1, VJP8
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...
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. ...
How much resistance is there for current input?
(ns-faq-juxta-11010-spec)
The resistance is 250 Ω (4–20 mADC). However some computing units also have 100 Ω input.
Do you have any conditioners that support Cu10 or Cu25 3-wire copper RTDs?
(ns-faq-ut-20056-select)
See the “Customized Signal Specifications” in the VJR6 RTD Converter general specifications (GS). Check the standard resistance value, standard temperature, manufacturer, and temperature coefficient (α) of the RTD you are using, and...
What is the internal load resistance of pulse input?
(ns-faq-juxta-11011-spec)
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 ...
How do I determine the internal load resistance?
(ns-faq-juxta-11012-spec)
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.
There are Pt100 Ω standards of IPTS-68, ITS-90, and JPt100 Ω, but what is the difference between them?
(ns-faq-juxta-11013-other)
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...
How many instruments can be connected to a voltage output terminal (1–5 VDC)?
(ns-faq-juxta-11014-spec)
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.
I want select a model for a pulse signal repeater (pulse isolator).
(ns-faq-juxta-20079-select)
Consider the VJP1, VJP8, or the MP1. Select criteria (input signal, output signal, frequency, pules) in the Product Finder.
How many instruments can be connected to a current output terminal (4–20 mADC)?
(ns-faq-juxta-11015-spec)
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 frequency setting should I use on an analog pulse converter when I want to output an integral pulse at 0.01㎥/P by using a 100㎥/H flowmeter?
(ns-faq-juxta-11016-spec)
100 × 1000/10/H = 10000/3600 Hz = 2.778 Hz (4 significant digits).
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.
There may be a 63% or 90% response depending on the manufacturer, but how should I compare these?
(ns-faq-juxta-11020-other)
A 90% response time is equivalent to 2.3 times the duration of a 63% response time.
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...
When ordering slide resistor conditioners, on models with total resistance, zero, and span resistance, what does total resistance mean?
(ns-faq-juxta-11022-other)
The total resistance ≥ zero side resistance + span resistance.
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.
About how many computations can be included?
(ns-faq-juxta-11027-spec)
The F series has 30 steps. The W series has 40 steps. The M/VJ series has 59 steps.
What are the computation intervals of computing units?
(ns-faq-juxta-11028-spec)
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.)
Is an externally attached resistance for current input included?
(ns-faq-juxta-11033-select)
It is with plug-in types. It is also sold separately.
Do you have any conditioners that support HART communication?
(ns-faq-juxta-11034-select)
A distributor for the V series (VJA1/H), and a distributor (DA7) and isolator (DC7) for the D series are available.
How can I suppress ripple noise on the instrument's input signal?
(ns-faq-juxta-11035-spec)
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...
Are there any models that allow me to set up an upper or lower limit limiter on the instrument's input signal?
(ns-faq-juxta-11036-select)
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...
Can I attach the VJ and M series horizontally?
(ns-faq-juxta-11037-other)
As the orientation affects heat dissemination, it cannot be horizontal.
What is the model of the VJ series terminal block (socket)? Can I use an Omron socket?
(ns-faq-juxta-11032-select)
It’s model T9093FL. The VJ socket is built with holes for screws that prevent falling off, therefore an Omron socket cannot be used.
Does the JUXTA VJ series support CCC and GB standards? Can it be used in China?
(ns-faq-juxta-11038-other)
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. ...
The VJ series can come with a second output for RS-485 communication, but can I change VJ series parameters on upstream devices (PCs or PLCs) using this communication? Ex.: Changing the VJP8 pulse rate setting via RS-485 communication
(ns-faq-juxta-11040-spec)
Because the RS-485 communication on output 2 is reserved for I/O or error status monitoring, it cannot be used to write parameters.
If installing lightning arresters between: transmitter →safety barrier (BARD)→distributor (VJA7), are there any restrictions on where I can place them?
(ns-faq-juxta-11041-select)
As our lightning arresters are not explosion proof, they cannot be used in the configuration of instruments you described.
I purchased the VJ series, but I can't remove the main unit from the socket.
(ns-faq-juxta-11047-connect)
The black knob on the front panel is the screw that secures the main unit. Turn it counterclockwise to loosen, then remove the unit.
I purchased an isolator with a 4-20 mA current input specification. Can I use it with voltages of 1-5 VDC?
(ns-faq-juxta-11049-connect)
Yes. Wire it without using the included resistor.
Is there a converter that converts voltage pulse to a non-voltage contact?
(ns-faq-juxta-11050-select)
We have pulse repeaters such as the VJP1, and VJP8.
Can you ship the VJ series alarm setter with preset alarm types and values?
(ns-faq-juxta-11051-spec)
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.
With a 2 output type signal conditioner, when not using a current output terminal, how should I handle the terminal processing?
(ns-faq-juxta-11052-connect)
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.
There's no output with an isolator. What should I do?
(ns-faq-juxta-11055-connect)
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...
There's no output with a distributor. What should I do?
(ns-faq-juxta-11056-connect)
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...
There's no output with a thermocouple temperature converter. What should I do?
(ns-faq-juxta-11057-connect)
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...
There's no output with an RTD temperature converter. What should I do?
(ns-faq-juxta-11058-connect)
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 ...
There's no output with a pulse signal repeater and pulse rate converter. What should I do?
(ns-faq-juxta-11059-connect)
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 ...
There's no output with an analog/pulse converter. What should I do?
(ns-faq-juxta-11060-connect)
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...
There is no output with a pulse/analog converter. What should I do?
(ns-faq-juxta-11061-connect)
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...
I purchased an isolator, and a resistor came with it. What is the resistor used for?
(ns-faq-juxta-11065-spec)
Resistors come with isolators that have terminal block format current input specifications. Please attach it to the input terminals before use.
Is there a warm up time for a signal conditioner?
(ns-faq-juxta-11066-spec)
Yes. To satisfy the performance specifications, you should power the unit for 10–15 minutes.
Please provide information about PCB usage. (JUXTA)
(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.
On the thermocouple temperature converter, when burnout is OFF, is any burnout detection current flowing?
(ns-faq-juxta-11073-spec)
No.
Can you tell me where to download catalogs, specifications, user manuals, technical information, drawings, software, and CAD data?
(ns-faq-gxgp-097-other)
You can download these items from the Partner Portal member site *Log-in Required. You must register (free) to use Partner Portal.
Can I apply DC to a “non-contact AC switch” “signal conditioner” “JUXTA” pulse signal repeater, pulse rate converter output? And if so, what is the maximum allowable load?
(ns-faq-juxta-20041-spec)
You can apply both AC or DC to non-contact AC switches. The maximum allowable loads are: 100 VAC/200 mA 100 VDC/200 mA
What does the allowable load resistance mean?
(ns-faq-juxta-20060-term)
This is the maximum resistance of an instrument that can be connected to the output side of a signal conditioner.
With JUXTA, the output won’t go to 0% below the low cut point.
(ns-faq-juxta-20035-spec)
With the JUXTA series, there is no 0% output below the low cut point. This would be linear output.
What is an RJC (reference junction compensation) sensor?
(ns-faq-juxta-20066-term)
A thermocouple welds one end of two dissimilar metals and measures the thermoelectromotive force from a converter terminal. The thermocouple output voltage is affected by the temperature at both ends, so you must measure the temperature of the termin...
What does the allowable conduction resistance mean?
(ns-faq-juxta-20072-term)
Allowable conduction resistance is resistance that can be used for the conductor between the input side instrument and the input terminal of the signal conditioner.
What is a thermocouple (TC?)
(ns-faq-juxta-20073-term)
A thermocouple (TC) is a temperature sensor based on the principle that an electric current is generated when a temperature difference is applied to a closed circuit created by putting together two metals of different types. (ThermoCouple)
Do you have a DIN rail–mountable converter/conditioner?
(ns-faq-juxta-20033-select)
Yes, the following can be mounted on DIN rails. VJ series M series F series W series
Can you tell me about the lifespan and maintenance of the JUXTA series?
(ns-faq-juxta-20028-spec)
See “Preventive Maintenance of Signal Conditioners” in TI 77J00B01-01.
What does span mean?
(ns-faq-juxta-20029-term)
Span means width, and is the width of the setting range.

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