YOKOGAWA JUXTA VJP8 User manual

User’s
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 77J01P08-01E
6th 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 VJP8 Pulse Rate Converter (User’s Manual) IM 77J01P08-01E
(This manual)
Model VJP8 Pulse Rate Converter (General Specications) GS 77J01P08-01E
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.
CHECKING PRODUCT SPECIFICATIONS
AND PACKAGE
(1) Checking the Model and Product Specications
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:
• VJP8: 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(E9786WL):1 piece
(When optional code /R is specied)
• User's Manual (IM 77J01P08-01E,this manual): 1 copy
• User’s manual (IM 77J01A00-91Z1): 1 copy
GENERAL
• This compact plug-in type pulse rate converter receives pulse
signals from the eld and converts them into various isolated
pulse outputs at a set pulse rate. It can also operate as a
pulse repeater (input frequency = output frequency) by setting
the pulse rate and pulse width type.
MODEL AND SUFFIX CODES
Model Su󰀩x codes Description
VJP8 -0 xx-xxx0/x Pulse Rate 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
1
Open collector (30 V DC/200 mA)
3Contactless AC switch (*3)
5Voltage pulse (5 V ±10%)
6Voltage pulse (12 V ±10%)
7Voltage pulse (24 V ±10%)
Output-2 signal
1
Open collector (30 V DC/200 mA)
3Contactless AC switch (*3)
5Voltage pulse (5 V ±10%)
6Voltage pulse (12 V ±10%)
7Voltage pulse (24 V ±10%)
P
Communication function (RS-485)
NNo output-2
0Always 0
Options
/SN No socket (with socket if not
specied)
/R With 200 Ω shunt resistor
(Specify when current pulse input.)
/C0 Coating (*3)
/FB Fuse bypass (*3)
*1 Operating range: 85 to 264 V AC/DC
*2 Operating range: 12 to 36 V DC
*3 When specifying contactless AC switch and su󰀩x codes /C0 or /FB,
CE marking is not applicable because the product does not conform to
safety and EMC standards.
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.
Model VJP8
Pulse Rate Converter
(Multi-function)
(Isolated Single-output and Isolated Dual-
output Types)

2IM 77J01P08-01E 6th Edition
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
plugged out, during transport or storage.
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-ø4.5 or more
Mounting Dimensions
59±0.3
Unit: mm
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/s2 or less, 11 ms, 3 axes, 6 directions, 3 times
each

3IM 77J01P08-01E 6th Edition
3. EXTERNAL WIRING
WARNING
●To avoid the risk of an electric shock, turn o󰀨 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
ammable or explosive gases or vapors. To do so is
highly dangerous.
●Use of the product ignoring the specications 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
specications.
• The external wiring to the terminals and wiring to
ground are as specications.
Note:When power of VJP8 is turned on/o󰀨, one pulse may be counted by the
pulse input device which connects to the VJP8.
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
1011
3 2 1
4
56
789
Power supply
Pulse output
Pulse 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: 200 Ωshunt 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
Pulse output connection example
+
−
Open collector
Contactless AC switch
(AC power supply connection)
Contactless AC switch
(DC power supply connection)
9
7Load
Load
Load
Load
+
−
9
7
Varistor or
CR spark quenching circuit
Spark quenching diode
Output-2 is
AC power
DC power
+
−
9
7
+
2(+) 5 (−)
5 V, 12 V, 24 V
−
Voltage pulse
9
7
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;
exercise care in operating it. Before you operate
the product, touch a nearby metal part to discharge
static electricity.
●If the ambient temperature is 50 °C or more, please
use the cable that the rated temperature is 70 °C or
more.

4IM 77J01P08-01E 6th Edition
4. DESCRIPTION OF FRONT PANEL
4.1 Front Panel
The communications connector in the front panel is used for
setting up parameters through a PC (VJ77 PC-based Parameters
Setting Tool) .
Communications connector
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.
5. SETTING PARAMETERS
Set the parameters using a PC (VJ77 Parameters Setting Tool).
Refer to “6. 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 Display Unit
The input display unit is used for referring the input signal.
Select and set "Hz" or "kHz" in [D20: UNIT].If the input range
exceeds 32000Hz,Please select "kHz".
5.1.2 Pulse Rate
Set the pulse rate within the numerically specied range in
[D52: PULSE RATE].
Setting range: 0.0001 to 2.0000(settable up to 4 decimal
places)
When the pulse width type is set to
“THROUGH” (no change), e󰀨ective range is
0.0001 to 1.0000.
5.1.3 Pulse Width Type
Select and set “THROUGH” or “ON PULSE” in [D53: PULSE
TYPE].
THROUGH: Outputs ON-state pulse time of frequency as
it is.
ON PULSE: Outputs ON-state pulse time after chang ing it
to the set value.
When the instrument is used as a pulse
signal repeater, set the pulse width type to
“THROUGH”, and the pulse rate to “1.0000”.
5.1.4 Pulse Width Time
The pulse width time is set when the pulse width type is set to
"ON PULSE."
Select and set "12.5µs", "50µs", "100µs", "12.5ms", "30ms",
"50ms", or "100ms" in [D54: PULSE WIDTH].
5.1.5 Pulse Logic (D/R)
The pulse logic (direct/reverse operation) of the pulse
output can be changed by setting [D50: OUT1 DR]. Select
REVERSE for reverse operation, and DIRECT for normal
operation.
5.1.6 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.
When set to ON, the input frequency is limited to 100Hz or
less and the minimum pulse width is 3ms.
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].

5IM 77J01P08-01E 6th Edition
6. LIST OF PARAMETERS
Parameter Display Item
MODEL Model
TAG NO Tag no.
SELF CHK Self-check result
A DISPLAY1 Display1
A01 INPUT1 Input value 1
A35 COUNTER1 Integrating counter 1 (*3)
A36 COUNTER2 Integrating counter 2 (*3)
A37 COUNTER3 Integrating counter 3 (*3)
A38 COUNTER4 Integrating counter 4 (*3)
A54 STATUS Status (*1)
A56 REV NO Rev. no.
A58 MENU REV MENU REV
A60 SELF CHK Self-check result
B DISPLAY2 Display2
B01 INPUT1 Input value 1
B35 COUNTER1 Integrating counter 1 (*3)
B36 COUNTER2 Integrating counter 2 (*3)
B37 COUNTER3 Integrating counter 3 (*3)
B38 COUNTER4 Integrating counter 4 (*3)
B60 SELF CHK Self-check result
D SET (I/O) Setting (I/O) (*2)
D01 TAG NO.1 Tag no. 1
D02 TAG NO.2 Tag no. 2
D03 COMMENT1 Comment 1
D04 COMMENT2 Comment 2
D20 UNIT Input display unit
D50 OUT1 DR Pulse logic (D/R)
D52 PULSE RATE Pulse rate
D53 PULSE TYPE Pulse width type
D54 PULSE WIDTH Pulse width time
D58 INPUT FILTER Input lter
D60 SELF CHK Self-check result
F SET(COM) Setting (communication) (*2)
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
P60 SELF CHK Self-check result
*1 The Status is displayed for service personnel to see history
records.
*2 There are items not displayed depending on what output-2 is
specied.
*3 The 5-byte hexadecimal integrating counter value is displayed in
decimal format in integrating counters 1 through 4.
7. 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.
7.1 Calibration Apparatus
• A calibrator (YOKOGAWA CA500 or equivalent)
7.2 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
+
–
Calibrator
7
9
Output-1
+
–
2. Produce a rectangular pulse of any frequency from the
calibrator to measure the value using a calibrator, then check
that the frequency (input frequency x set rate) is output.
8. 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% ) 3.7W
100-240VAC/DC( ± 10% )
50/60 Hz 3.7 W 9.2 VA
Rated voltage (Input signal) : 50 V DC
Rated voltage (Communication output signal) : 5 V DC
Rated voltage (Voltage Pulse output signal) : 26.4 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

6IM 77J01P08-01E 6th Edition
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
operating this instrument by external power supply,
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.
Note: When contactless AC switch is specied for the
output-1 signal code or output-2 signal code, it will not
comply with safety and EMC standards.
9. ENVIRONMENT STANDARD
EU RoHS directive: EN IEC 63000
(However, when contactless AC switch is specied for the
output signal, and su󰀩x code /C0 or /FB is specied, CE
marking is not applicable because the product does not
conform to safety and EMC standards.)
10. 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.