YOKOGAWA JUXTA VJ Series User Manual Download Page 2

1. 

MOUNTING METHODS 

 CAUTION

 

Plug/disconnect the main unit into/from the 

socket vertically to the socket face.  Otherwise the 

terminals may bend and it may cause bad contact.

 

The converter shall not tilt 5 degrees or more in 

either direction when installed.

 

When the converter is not connected to the socket,  

it is necessary to protect the socket against ingress 

of dust to the connector part.

 

Keep this product in a conductive bag when 

plugged out, during transport or storage.

1.1  Wall Mounting 

Loosen the main unit-fixing screw to disconnect the main unit 

from the socket. Next, anchor the socket onto the wall with 

screws. Then, plug the main unit into the socket and secure the 

main unit with the main unit-fixing screw. 

29.5 or more

22±0.2

2-M4 or

2-ø4.5 or more

Mounting Dimensions

Unit: mm

59±0.3

Main unit-fixing screw

Socket

(Part no.: 

T9093FL)

Main unit

Threaded hole for

fixing the main unit

Mounting screws

1.2  DIN Rail Mounting

Locate the VJUK so that the DIN rail fits into the upper part of the 

DIN-rail groove at the rear of the socket, and fasten the socket 

using the slide lock at the lower part of the socket. 

DIN rail

DIN rail

(Rear of socket)

Socket 

(Part no.: 

T9093FL)

Slide lock

DIN rail

Fit into here

Push

1.3  Mounting Using a Multi-mounting Base

For mounting using a multi-mounting base, see the user’s manual 

for VJCE (VJ Mounting Base).

1.4  Using a Duct

Wiring duct should be installed at least 30 mm away from the top 

and bottom faces of the main unit. 

2. 

INSTALLATION AND ENVIRONMENTAL 

CONDITIONS

 •

Avoid the following environments for installation locations: 

 

Areas with vibrations, corrosive gases, dust, water, oil, 

solvents, direct sunlight, radiation, a strong electric field, 

and/or a strong magnetic field, direct radiant heat

wind, 

temperature fluctuation,  2,000 m or more above sea level, 

outdoors.

 •

If there is any risk of a surge being induced into the power line 

and/or signal lines due to lightning or other factors, a dedicated 

lightning arrester should be used as protection for both the 

product and a field-installed device.

 • Use indoors at an altitude of 2000 m or less.

 •

Operating temperature/humidity range: 

-1

0 to 55°C (-10 

to 45°C for side-by-side mounting*)/5 to 90%RH (no 

condensation)

*  If the previous model (style S3.xx earlier) is installed 

together, the ambient temperature is 0 to 40°C.

 •

Continuous vibration: (at 5 to 9 Hz) Half amplitude of 3 mm or 

less (at 9 to 150 Hz) 9.8m/s

2

 or less, 1 oct/min for 90 minutes 

each in the three axis directions

 •

Impact: 98 m/s2 or less, 11 ms, 3 axes, 6 directions, 3 times 

each

3. 

EXTERNAL WIRING 

 WARNING

 

To avoid the risk of an electric shock, turn off the 

power supply and use a tester or similar device to 

ensure that no power is supplied to a cable to be 

connected, before carrying out wiring work.

 

Do not operate the product in the presence of 

flammable or explosive gases or vapors. To do so is 

highly dangerous.

 

Use of the product ignoring the specifications may 

cause overheating or damage. Before turning on the 

power, ensure the following:

 •

Power supply voltage and input signal value 

applied to the product should meet the required 

specifications.

 • The external wiring to the terminals and wiring to 

ground are as specifications.

Wiring should be connected to the terminals on the socket of 

the product.  The terminals for external connections are of M3 

screws.  Use crimp-on terminal lugs for connections to the 

terminals.

 •

Recommended cables: A nominal cross-sectional area of 

0.5 mm

 or thicker for signal cables, and that of 1.25 mm

 or 

thicker for power cables. 

10

11

3 2 1

4

5

6

7

8

9

3

1

4

3

1

3

1

4

A

B

B

+

+

mV

Input signal

(when the model code is 3)

11

10

8

L+

N−

GND

Power supply

9

7

Alarm-1 signal

5

2

Alarm-2 signal

ALM2

ALM1

COM

COM

Alarm output

Alarm output

(N.O)

(N.O.)

Recommended crimp-on 

lug size 

(Unit: mm)

5.5 or more

ø3.2 to 3.5

5.5 or less

RJC

Make the wiring resistance of RTD input 

terminals 1and 3 the same.

Input signal

(when the model  code is 2)

Input signal

(when the model code is 1)

When using

internal power

supply

1

3

Transmitter

PS+

+

When using

external power

supply

3

Transmitter

+

4

COM

When using as

an isolator

4

3

Transmitter

COM

+

1

3

+

Input

DC voltage/

current

standard

R: precision resistor

    for current output

R

Thermocouple

RTD

RJC sensor

(for thermocouple input)

Signal

line

RJC

sensor

Terminal

screw

 CAUTION

 

Connect the RJC sensor at the correct position as 

shown above.  Otherwise temperature cannot be 

measured correctly.

 

Connect the RJC sensor so that it overlaps the input 

signal line.

 

Handle the RJC sensor lead with care to prevent 

disconnection.

 

The power line and input/output signal lines should 

be installed away from noise-generating sources.  

Otherwise accuracy cannot be guaranteed.

 

Make sure to earth ground the ground terminal 

through minimum resistance. The length and 

thickness of the grounding cable should be as 

short and thick as possible.  Directly connect the 

lead from the ground terminal (terminal no. 8) of 

the product to the ground.  Do not carry out daisy-

chained inter-ground terminal wiring.

2

IM 77J01U21-01E

3rd Edition

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