YOKOGAWA JUXTA VJQ8 User manual

Userʼs
Manual
1
Thank you for purchasing the JUXTA Signal Conditioner.
Please read through this manual before use for correct handling.
2-9-32, Naka-cho Musashino-shi, Tokyo 180-8750 Japan
Phone: [phone] Facsimile: [phone]
http://www.yokogawa.com/ns/juxta/im/
You can download the latest manuals from the following website:
IM 77J01Q08-01E
8th Edition July 2023(YK)
CAUTIONARY NOTES FOR SAFE USE OF THE
PRODUCT
This User’s Manual should be carefully read before installing
and operating the product. Please keep this User’s Manual for
future reference.For more information of the safety precautions,
please refer to the “Precautions on the Use of the JUXTA
Series (IM 77J01A00-91Z1)”. The related manuals and general
specications are shown in the table below.
Doc. Name Doc. Number
Precautions on the Use of the JUXTA Series
(User’s
Manual)
IM 77J01A00-91Z1
Model VJQ8 Pulse to Analog Converter
(User’s Manual) IM 77J01Q08-01E
(This manual)
Model VJQ8 Pulse to Analog Converter
(General
Specications)
GS 77J01Q08-01E
User’s manuals in the above table are essential parts of the
product; keep it in a safe place for future reference.
This manual is intended for the following personnel;
• Engineers responsible for installation, wiring, and maintenance
of the equipment.
• Personnel responsible for normal daily operation of the
equipment.
The following symbol is used on the product and in this manual to
ensure safe usage.
WARNING
Calls attention to actions or conditions that could
cause serious or fatal injury to the user, and indicates
precautions that should be taken to prevent such
occurrences.
CAUTION
Calls attention to actions or conditions that could
cause injury to the user or damage to the instrument
or property and indicates precautions that should be
taken to prevent such occurrences.
QR Code
The product has a QR Code pasted for e󰀩cient plant
maintenance work and asset information management.
It enables conrming the specications of purchased products
and user’s manuals.
For more details, please refer to the following URL.
https://www.yokogawa.com/qr-code
* QR Code is a registered trademark of DENSO WAVE
INCORPORATED.
CHECKCHECKING PRODUCT SPECIFICA-
TIONS AND PACKAGE
(1) 
Check that the model and specications indicated on the
nameplate attached to the main unit are as ordered.
(2) Packaged Items
Check that the package contains the following items:
• VJQ8: 1 unit
Standard Accessories:
• Tag number label: 1 sheet
• Range label: 1 sheet
• Socket (T9093FL): 1 piece
(when /SN option is not specied.)
• Shunt resistor:1 piece
(When optional code /R□ is specied)
• User's Manual (IM 77J01Q08-01E,this manual): 1 copy
• User’s manual (IM 77J01A00-91Z1): 1 copy
GENERAL
This compact plug-in type pulse-to-analog converter receives
pulse signals from the eld and converts them into isolated DC
current or DC voltage signals.
Model VJQ8
Pulse to Analog Converter
(Multi-function)
(Isolated Single-output and Isolated Dual-
output Types)

2IM 77J01Q08-01E 8th Edition
MODEL AND SUFFIX CODES
Model 󰀩 Description
VJQ8 -0      0 Pulse to Analog Converter
(Multi-function)
-0 Always 0
Output 11 output
22 outputs
Power supply 6100-240 V AC/DC (*1)
715-30 V DC (*2)
Transmitter power
supply
-1 12 V DC ±10%
-2 24 V DC ±10%
Output-1 signal
A4 to 20 mA DC
B2 to 10 mA DC
C1 to 5 mA DC
D0 to 20 mA DC
E0 to 16 mA DC
F0 to 10 mA DC
G0 to 1 mA DC
10 to 10 mV DC
20 to 100 mV DC
30 to 1 V DC
40 to 10 V DC
50 to 5 V DC
61 to 5 V DC
7−10 to +10 V DC
ZCustom order (DC current/
voltage signal)
Output-2 signal
A4 to 20 mA DC
61 to 5 V DC
PCommunication function
(RS-485)
TAlarm output (2 relay
contacts)
NNo output-2
0Always 0
Options
/SN No socket (with socket if not
specied)
/R100 With 100 Ω shunt resistor (*3)
/R220 With 220 Ω shunt resistor (*3)
/R510 With 510 Ω shunt resistor (*3)
/R1000
With 1000 Ω shunt resistor
(*3)
/R2200
With 2200 Ω shunt resistor
(*3)
/C0 Coating
(*4)
/FB Fuse bypass
(*4)
*1 Operating range: 85 to 264 V AC/DC
*2 Operating range: 12 to 36 V DC
*3 Specify when current pulse input
*4 When option code /C0 or /FB is specied, the conformity to the safety
and EMC standards is excluded. CE marking is not applicable.
Note: An exclusive User’s Manual might be attached to the
products whose su󰀩x codes or option codes contain the code
“Z” (made to customers’ specications). Please read it along
with this manual.
1. MOUNTING METHOD
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

1.1 Wall Mounting
Loosen the main unit-xing screw of the product and pull out the
main unit from the socket. Fix the socket on the wall with screws.
Next, insert the main unit into the socket and fasten the main unit
with the main unit-xing screw.
29.5 or more
22±0.2
2-M4 or
2-ø
4.5 or more
Mounting Dimensions
Unit: mm
59±0.3
Main unit-fixing screw
Socket
Main unit
Threaded hole for
fixing the main unit
Mounting screws
1.2 DIN Rail Mounting
Insert a DIN rail into the upper part of the DIN rail groove on the
rear of the socket, and then slide the slide lock at the lower part of
the socket upwards until the socket is xed into position as shown
below
DIN rail
DIN rail
(Rear of socket)
Slide look
DIN rail
Fit into here
Push
1.3 Mounting Using
When using a multi-mounting base, see the User's Manual for
VJCE (VJ Mounting Base).
1.4 Using a Duct
When using a wiring duct, install the duct 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 eld,
and/or a strong magnetic eld, direct radiant heat, wind,
temperature uctuation.
• 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 eld-installed device.
• Use indoors at an altitude of 2000 m or less.
• Operating temperature/humidity range: −10 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/s2 or less, 1 oct/min for 90 minutes
each in the three axis directions
• Impact: 98 m/s2or less, 11 ms, 3 axes, 6 directions, 3 times
each

3IM 77J01Q08-01E 8th Edition
3. EXTERNAL WIRING
WARNING
●󰀨
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

highly dangerous.
●
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
specications.
• The external wiring to the terminals and wiring to
ground are as specications.
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 mm2or thicker for signal cables, and that of 1.25 mm2or
thicker for power cables.
Wiring Diagram
Shunt resistor
(Externally connected
for current pulse input)
1011
3 2 1
4
56
789
Power supply
Analog output
Analog output
1110 8
L+ N– GND
+
–
+
–
+
–
3
4
+
–
Transmitter
TransmitterTransmitter
Transmitter
5
2
9
7
1
3
4
+
−
PS+
+
+V
−
3
4
+
−
+
−
Current pulse
(using the transmitter
power supply)
Current pulse
(using an external
power supply)
Voltage pulse
(using the transmitter
power supply)
No-voltage contact
(Open collector)
ON/OFF contact
Input
Output-2
Output-1
+
−
1
3
4
3
4
+
−
R
PS+
+
−
*: Transmitter power supply
* *
R: shunt resistor
+
−
Voltage pulse
(not using the transmitter
power supply)
+
−
R
3
4
2-wire
transmitter
2-wire
transmitter
+
−
External
power
supply
B+
A–
COM
5
2
6
RS-485
communication
5
2
6
ALM1
(N.O.)
(N.O.)
ALM2
COM
Alarm output
External Receiving Resistor (Shunt Resistor) for Current Pulse Input
Option code Resistance Part No. Rated power
/R100 100 Ω E9786WW 1 W
/R200 220 Ω E9786WS 1 W
/R510 510 Ω E9786WT 2 W
/R1000 1000 Ω E9786WU 2 W
/R2200 2200 Ω E9786WV 2 W
CAUTION
●Do not use output-2 for the isolated single-output type.
●The power line and input/output signal lines should
be installed away from noise-generating sources.
Other wise 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.
●The product is sensitive to static electricity;

the product, touch a nearby metal part to discharge
static electricity.
●
relays and solenoid valves causes malfunction or

spark-removal into the line in parallel with the load.
Recommended CR
• C: 0.5 to 1 µF against contact current 1 A
• R: 0.5 to 1 Ω against contact voltage 1 V
●If the ambient temperature is 50 °C or more, please
use the cable that the rated temperature is 70°C or
more.
4. DESCRIPTION OF FRONT PANEL
4.1 Front Panel
The communications connector in the front panel is used for
setting up parameters through the PC (VJ77 Parameters Setting
Tool). The alarm-1 and alarm-2 LEDs light up if an alarm occurs
(those LEDs are provided only when the output-2 is specied for
alarm output (the output-2 su󰀩x code is T).)
Alarm indicator lamp
(for alarm 1)
Communication connector
Alarm indicator lamp
(for alarm 2)
4.2 Connector for Communication
< How to connect with the setting tool>
JUXTA
VJ series
Modular-jack
conversion adapter
Dedicated adapter for VJ77
(L4506HA)
Micro USB (USB2.0)
cable
PC with the
VJ77 installed
• Use the VJ77 of version R2.02.01 or later.

4IM 77J01Q08-01E 8th Edition
5. SETTING PARAMETERS
Set the parameters using a PC (VJ77 Parameter Setting Tool)
Refer to “8. LIST OF PARAMETERS” in this manual and the
User’s Manual for VJ77 PC-based Parameters Setting Tool (IM
77J01J77-01E) . Parameters are indicated inside the [ ].
5.1 Settings Related to Inputs and Outputs
5.1.1 Input Range Unit
When referring and setting the input range, select and set “Hz”
or “kHz” in [D20: UNIT]. Select “kHz” when input range is over
32000Hz.
5.1.2 Conversion Mode
Select and set the action of the instrument from “F/V
CONVERTER” (F/V conversion) or “INTEGRATOR” (pulse
integrator) in [D17: SELECT MODE].
F/V converter: Set when converting 0 to 100% of frequency
input to 0 to 100% of analog output, and
outputting it.
INTEGRATOR: Set when converting 0 to 100% of frequency
in put to 0 to 100% of analog output after
computing the average frequency from the
pulse number integrated per sample time, and
outputting it.
5.1.3 Sample Mode
Select and set “AUTO” or “MANUAL” in [D18: SAMPLE
MODE], when the conversion mode is set to “INTEGRATOR.”
AUTO: Outputs the sample time forcibly on the provided
MANUAL: Sets the sample time within setting range.
5.1.4 Sample Time
When the sample mode is set to “MANUAL”, set the sample
time in numerical value in [D19: SAMPLETIME].
• Sample time setting range: 0.1 to 100 seconds, by 0.1
second When the sample mode is set to “AUTO”, the
sample time is forcibly decided on the following conditions.
0.1 second when F100 (100% input frequency) is 1kHz or more
(1/F100) x 100 seconds when F100 is over 1Hz and below 1kHz
100 seconds when F100 is 1Hz or less.
5.1.5 Input Range
Set the 0% value of input range in [D24: INPUT1 L_RANGE],
and 100% of input range in [D25: INPUT1 H_RANGE] within
the numerically specied range.
CAUTION
In case the input range is changed after factory-ship,
the instrument may not work within the rated accuracy
range depending on the changed input range. Perform
the adjustment following the maintenance of this
instruction manual after changing the input range.
5.1.6 Input Low Cut Point
Set [D43: LOW CUT] to the low cut point.
Setting range: 0.01 Hz to F100 Hz (100% of input range)
If the input is less than or equal to the low cut point, the input is
0Hz.
5.1.7 Input Filter
When the chattering noise is generated in input, the input lter
is used to restrain the inuence. Select and set “ON” in [D58:
INPUT FILTER], then the input lter for time constant of about
10ms will be connected.
5.1.8 Direction of Output Action
Analog output signals can be reversed. To reverse the
signal from output-1, set [D50: OUT1 DR] to REVERSE. For
output-2, set [D51: OUT2 DR] to REVERSE. To return the
output-1 signal to normal, set [D50: OUT1 DR] to DIRECT.
For output-2, set [D51: OUT2 DR] to DIRECT.
5.2 Settings Related to Communication
Function
Set the following parameters when output-2 is specied
for communication function. For more information on the
communication function, see the Instruction Manual for VJ Series
Communication Function (IM 77J1J11-01E).
5.2.1 Communication Protocol
Set the communication protocol by selecting from among
PCLINK, PC-LINK WITH SUM, MODBUS ASCII, MODBUS
RTU, and LADDER in [F01: PROTOCOL].
5.2.2 Communication Address
Set the address number of the isolator numerically in a range
of 1 to 99 in [F02: ADDRESS].
5.2.3 Baud Rate
Set the baud rate by selecting from among 1200, 2400, 4800,
9600, 19200, and 38400 bps in [F03: BAUD RATE].
5.2.4 Parity
Select and set NONE, EVEN, or ODD in [F04: PARITY].
5.2.5 Data Length
Select and set 7 bits or 8 bits in [F05: DATA LEN].
5.2.6 Stop Bit
Select and set 1 bit or 2 bits in [F06: STOP BIT].
5.2.7 Input Decimal Point Position
Number of digits of decimal places (setting of D register
[D0003]) can be set.
Select and set among 0 to 5 digits in [F07: INPUT DEC PT].
5.3 Settings Related to Alarm Output
Set the following parameters when output-2 is specied for alarm
output.
5.3.1 Alarm Setpoints
Set the alarm setpoints of alarm-1 and alarm-2 in [E01: SET
POINT1] and [E04: SET POINT2] numerically.
• Setting range: A range of 0 to 100% of input range
• Setting resolution: 0.1%
5.3.2 Direction of Alarm Action
Select the direction of alarm-1 action and that of alarm-2
action from among HIGH ALM (high-limit alarm) and LOW
ALM (low-limit alarm) and set each in [E05: ALM1 ACTION]
(direction of alarm-1 action) or [E06: ALM2 ACTION](direction
of alarm-2 action).
• To activate alarm status when input signal ≥ alarm setpoint,
select HIGH ALM.
• To activate alarm status when input signal ≤ alarm setpoint,
select LOW ALM.
5.3.3 Hysteresis
Set alarm-1 and alarm-2 hysteresis, in [E09: HYSTERESIS1]
and[E10: HYSTERESIS2]. Hysteresis is a value added to the
alarm setpoint in order for an alarm status to be released (to
normal) after the alarm status has been activated. The alarm
status will be released in the following conditions, depending
on the direction of alarm action.
* When HIGH ALM (high-limit alarm) is set: Alarm is released
when input signal < (alarm setpoint - hysteresis).
* When LOW ALM (low-limit alarm) is set: Alarm is released
when input signal > (alarm setpoint + hysteresis).
• Setting range: A range of 0 to 100% of input range
• Setting resolution: 0.1%
5.3.4 Alarm ON Delay and Alarm OFF Delay
Set alarm-1 and alarm-2 ON delays in [E11: ON DELAY1] and
[E12:ON DELAY2] and then alarm-1 and alarm-2 OFF delays
in [E131: OFF DELLAY1] and [E14: OFF DELAY2]. An alarm
ON delay is a delay time from the establishment of alarm
condition to alarm output; an alarm OFF delay is a delay time
from the establishment of return-to-normal condition to output.
• Setting range: 0 to 999 seconds
• Setting resolution: 1 second (Note that about 0.2 second
will be added to set time to prevent erroneous operation.)
For example, when an alarm ON delay is set to 1 second,
alarm output is generated if alarm status continues for
more than 1 second after the input value exceeds the
alarm setpoint. Further, when an alarm OFF delay is set
to 2 seconds, alarm output is released if normal condition
continues for more than 2 seconds after the input value has
returned to normal from the alarm status.
5.3.5 Direction of Relay Action
Set the direction of relay energizing in alarm-1 normal
condition and alarm-2 normal condition by selecting from
among NRM DEENERGIZED (de-energized under normal
condition) and NRM ENERGIZED (energized under normal
condition) in [E15: RL1 ACTION] and [E16: RL2 ACTION]
and set them.

5IM 77J01Q08-01E 8th Edition
6. DESCRIPTION OF ALARM ACTIONS
This chapter describes examples of alarm actions under the
following conditions.
Item Alarm-1 Alarm-2
Parameter
Setpoint Parameter Setpoint
Direction of alarm
action
E05: ALM1 ACTION High-limit
alarm
E06: ALM2 ACTION Low-limit
alarm
Alarm setting E03: SET POINT1 80% E04 : SET POINT2 15%
Hysteresis E09: HYSTERESIS1 10% E10 : HYSTERESIS2 5%
Alarm ON delay E11: ON DELAY1 1 sec. E12 : ON DELAY2 3 sec.
Alarm OFF delay E13: OFF DELAY1 2 sec. E14 : OFF DELAY2 4 sec.
Description of alarm
actions
The alarm sounds if the
condition where the input value
is 80% or more of high-limit
alarm continues for more than 1
second. After the alarm sounds,
when the condition where
input value is less than 70%of
the high-limit alarm continues
for more than 2 seconds, the
status returns to normal
The alarm sounds if the
condition where the input value
is 15% or less of low-limit
alarm continues for more than
3 seconds. After the alarm
sounds, when the condition
where input value is more than
20% of the low-limit alarm
continues for more than 4
seconds, the status returns to
normal.
Alarm-1 action
Alarm-2 action
Normal Normal
Normal Normal
Alarm
Alarm
[%]
0
20
15
40
60
80
100
1 sec.
2 sec.
3 sec. 4 sec.
Alarm-2 hysteresis (5%)
Alarm-1 hysteresis (10%)
Alarm-1 setpoint (80%)
Alarm-2 setpoint (15%)
Elapsed time 1 sec.
[1] [2]
[3] [4]
[1]: Alarm status does not continue for more than 1 second after
the alarm conditions are established at alarm-1.
[2]: Normal status does not continue for more than 2 seconds after
the normal conditions are established at alarm-1.
[3]: Alarm status does not continue for more than 3 seconds after
the alarm conditions are established at alarm-2.
[4]: Normal status does not continue for more than 4 seconds after
the normal conditions are established at alarm-2.
Alarm-1
ON delay Alarm-2
ON delay Alarm-2
OFF delay
Alarm-1
OFF delay
Alarm conditions
established
Alarm conditions
established Normal conditions
established
Normal conditions established
High-limit alarm ON
Low-limit alarm ON
High-limit alarm OFF
Low-limit alarm OFF
7. TIMING CHART OF PULSE
INTEGRATION OPERATION
This timing chart shows an example of the integration operation
where input frequency is 0 to 10 Hz and sampling time is 2 sec.
10%
2 sec
0%
ON ON ON ON ON ON ON ON
Sampling
interval
Analog
output
Input pulse
5% 5%
20%
8. LIST OF PARAMETERS
Parameter Display Item
MODEL Model
TAG NO Tag no.
SELF CHK Self-check result
A DISPLAY1 Display1 (*3)
A01 INPUT1 Input value 1 (*1)
A09 OUTPUT1 Output value 1
A10 OUTPUT2 Output value 2
A15 ALM1 STATUS Alarm-1 status
A16 ALM2 STATUS Alarm-2 status
A35 COUNTER1 Integrating counter 1 (*5)
A36 COUNTER2 Integrating counter 2 (*5)
A37 COUNTER3 Integrating counter 3 (*5)
A38 COUNTER4 Integrating counter 4 (*5)
A54 STATUS Status (*2)
A56 REV NO Rev. no.
A58 MENU REV MENU REV
A60 SELF CHK Self-check result
B DISPLAY2 Display2 (*3)
B01 INPUT1 Input value 1 (*1)
B09 OUTPUT1 Output value 1
B10 OUTPUT2 Output value 2
B15 ALM1 STATUS Alarm-1 status
B16 ALM2 STATUS Alarm-2 status
B35 COUNTER1 Integrating counter 1 (*5)
B36 COUNTER2 Integrating counter 2 (*5)
B37 COUNTER3 Integrating counter 3 (*5)
B38 COUNTER4 Integrating counter 4 (*5)
B60 SELF CHK Self-check result
D SET (I/O) Setting (I/O) (*3)
D01 TAG NO.1 Tag no. 1
D02 TAG NO.2 Tag no. 2
D03 COMMENT1 Comment 1
D04 COMMENT2 Comment 2
D17 SELECT MODE Conversion mode
D18 SAMPLE MODE Sample mode
D19 SAMPLE TIME Sample time
D20 UNIT Input Range Unit
D24 INPUT1 L_RNG Input low range
D25 INPUT1 H_RNG IInput high range
D32 OUT1 L_RNG Output-1 low range (*4)
D33 OUT1 H_RNG Output-1 high range (*4)
D34 OUT2 L_RNG Output-2 low range (*4)
D35 OUT2 H_RNG Output-2 high range (*4)
D43 LOW CUT Input low cut point
D50 OUT1 DR Direction of output-1 action
D51 OUT2 DR Direction of output-2 action
D58 INPUT FILTER Input lter
D60 SELF CHK Self-check result
E SET(ALM) Setting (alarm output) (*3)
E03 SET POINT1 Alarm-1 setting
E04 SET POINT2 Alarm-2 setting
E05 ALM1 ACTION Direction of alarm-1 action
E06 ALM2 ACTION Direction of alarm-2 action
E09 HYSTERESIS1 Alarm-1 hysteresis
E10 HYSTERESIS2 Alarm-2 hysteresis
E11 ON DELAY1 Alarm-1 ON delay setting
E12 ON DELAY2 Alarm-2 ON delay setting
E13 OFF DELAY1 Alarm-1 OFF delay setting
E14 OFF DELAY2 Alarm-2 OFF delay setting
E15 RL1 ACTION
Direction of alarm-1 relay action
E16 RL2 ACTION Direction of alarm-2 relay action
E60 SELF CHK Self-check result
F SET(COM) Setting (communication) (*3)
F01 PROTOCOL Communication protocol
F02 ADDRESS Address
F03 BAUD RATE Baud rate
F04 PARITY Parity
F05 DATA LEN Data Length
F06 STOP BIT Stop bit
F07 INPUT DEC PT
Decimal point position of input
F60 SELF CHK Self-check result
P ADJUST Adjustment (*3)
P30 OUT1ZERO ADJ Zero adjustment of output-1
P31 OUT1SPAN ADJ Span adjustment of output-1
P32 OUT2ZERO ADJ Zero adjustment of output-2
P33 OUT2SPAN ADJ Span adjustment of output-2
P60 SELF CHK Self-check result
Q TEST Test (*3)
Q04 OUT1 TEST Forced output (output 1)
Q05 OUT2 TEST Forced output (output 2)
Q10 ALM1 TEST Forced output (alarm 1)
Q11 ALM2 TEST Forced output (alarm 2)
Q60 SELF CHK Self-check result
*1 Instantaneous frequency is displayed even if conversion
mode is pulse integration.
*2 The Status is displayed for service personnel to see
history records.
*3 There are items not displayed depending on what output-2
is specied.
*4 The parameters are the items to be set at the factory.
*5 The 5-byte hexadecimal integrating counter value is
displayed in decimal format in integrating counters 1
through 4.

6IM 77J01Q08-01E 8th Edition
9. MAINTENANCE
The product starts running immediately when the power is turned
on; however, it needs 10 to 15 minutes of warm-up before it
meets the specied performance.
9.1 Calibration Apparatus
• A calibrator (YOKOGAWA CA500 or equivalent)
• A precision resistor of 250 Ω ±0.01%, 1W
• Setting tool for adjustment (Refer to "4.2 Connector for
Communication" in this manual.)
9.2 Calibration Procedure
1. Connect the instruments as shown below. First adjust the
output-1 signal and then the output-2 signal.
1011
3 2 1
4
56
789
Power supply
1110 8
L+N–GND
3
4
+
–
Input
Calibrator
Calibrator
2
5
Output-2
R
+
–
Calibrator
2
5
Alarm-1
ALM1
(N.O.)
(N.O.)
COM
+
–
Calibrator
6
5
Alarm-2
ALM2
COM
+
–
Calibrator
7
9
Output-1
R
+
–
R: For current output using 250 Ω
precision resistor
2. Use the calibrator and apply input signals equivalent to 0, 25,
50, 75, and 100% of the input span to the product.
3. Check to see the corresponding output voltages are 0, 25, 50,
75, and 100% respectively and within the specied accuracy
rating. (“R” is used for current output.)
For alarm output, check the relay action by the alarm indicator
lamp or resistance of output terminals.
• When adjusting the output signal, use the VJ77 parameter
setting tool.
For adjustment using a setting tool, refer to the User’s Manual for
setting tool and “8. LIST OF PARAMETERS” in this manual.
User’s Manual for VJ77 [Document No.: IM 77J01J77-01E]
10. SAFETY AND EMC STANDARDS
The following will be acquired.
Safety:
IEC/EN 61010-1 compliance (CE)
IEC/EN 61010-2-030 compliance (CE)
CAN/CSA-C22.2 No.61010-1 (CSA)
CAN/CSA-C22.2 No.61010-2-030 (CSA)
UL61010-1 (CSA NRTL/C)
UL61010-2-030 (CSA NRTL/C)
Overvoltage category: II
Pollution degree: 2
Measurement category: O (other)
Rated power supply voltage: 15-30VDC( ± 10% ) 3.7 W
100-240VAC/DC( ± 10% )
50/60 Hz 3.7 W 9.2 VA
Rated voltage (Input signal) : 50 V DC
Rated voltage (Analog output signal): −10 to +10 V DC,
0 to 20 mA DC
Rated voltage (Alarm output signal) : 30 V DC 1A
Rated voltage (Communication output signal) : 5 V DC
Rated transient overvoltage: 1500 V (*)
* This is a reference safety standard value for the
measurement Category O. This value is not necessarily
a guarantee of instrument performance.
CAUTION
This instrument is for Measurement Category O
(other). Do not use it for measurements in locations
falling under Measurement Categories II, III, and IV.
Internal Wiring
Outlet
Entrance
Cable
III T
O
II
IV
Measurement
category
Description Remarks
O (other) For measurements
performed on circuits not
directly connected to MAINS.
II CAT.II For measurements
performed on circuits directly
connected to the low-voltage
installation.
Appliances,
portable
equipments,
etc.
III CAT.III For measurements
performed in the building
installation.
Distribution
board, circuit
breaker, etc.
IV CAT.IV For measurements
performed at the source of
the low-voltage installation.
Overhead
wire, cable
systems, etc.
EMC standards:
•CE:
EN 61326-1 Class A, Table 2
EN 61326-2-3
* The instrument continues to operate at a measurement
accuracy of within ±20% of the range during testing.
EN 55011 Class A, Group 1
EN 61000-3-2
EN 61000-3-3
•RCM:
EN 55011 Class A, Group 1
•KC:
Electromagnetic wave interference prevention standard,
electromagnetic wave protection standard
CAUTION
Caution to comply with EMC standards: When

use an independent power unit conforming to CE-
marking. Be sure to use the lightning arrester to
comply EMC standards.
Note: When option code /C0 or /FB is specied, the
conformity to the safety and EMC standards is
excluded.
11. ENVIRONMENT STANDARD
EU RoHS directive: EN IEC 63000
(However, when option code /C0 or /FB is specied, CE mark-
ing is not applicable because the product does not comply
with the Safety and EMC standards.)
12. TRANSPORT AND STORAGE CONDITIONS
• Temperature: −25 to 70°C
• Temperature change rate: 20°C per hour or less
• Humidity: 5 to 95%RH (no condensation)
CAUTION
Keep this product in a conductive bag when plugged
out, during transport or storage.