User’s
Manual
IM 77J01H07-01E
Model VJH7
Isolator (Multi-function)
(Isolated Single-output and
Isolated Dual-output Types)
1. CAUTIONARY NOTES FOR SAFE
USE OF THE PRODUCT
For the correct use of this product, read through this manual before
use. The following safety symbol is indicated on the product to ensure safe use.
CAUTION
If this symbol is indicated on the product, the operator
should refer to the explanation given in the instruction
manual in order to avoid personnel injury or death to either
themselves or other personnel, and/or damage to the instrument. The manual describes the special care the operator
should exercise to avoid shock or other dangers that may result in injury or loss of life.
The following symbol marks are used only in this manual.
IMPORTANT
Indicates that operating the hardware or software in a particular manner may damage it or result in a system failure.
NOTE
Draws attention to information that is essential for understanding the operations and/or features of the product.
4. MOUNTING METHODS
4.1 Wall Mounting
Loosen the main unit-fixing screw of the isolator 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.
Socket
Threaded hole for
fixing the main unit
Main unit
Main
unit-fixing
screw
<Mounting Dimensions>
29.5 or more
22±0.2
2-M4 or 2-ø4.5 or more
Unit: mm
Mounting
screws
2. CHECKING PRODUCT SPECIFICATIONS AND THE CONTENTS
OF PACKING
(1) Model Number and Specification Check
Check that the model number and specifications shown on the
nameplate attached on the side of the product are as ordered.
(2) Contents of the Packing
Check that the packing contains the following items:
● VJH7 main unit, 1
● Instruction Manual (IM 77J1H07-01E), 1
Accessories:
● Tag number label, 1
● Renge label, 1
● Shunt registor (for specification of current input), 1
3. GENERAL
This plug-in isolator, which belongs to the JUXTA series of signal
conditioners, receives DC current or voltage signals and converts
them to pairs of isolated DC voltage or current signals.
• Output-2 signal is selectable from a DC voltage signal, DC
current signal, communication function (RS-485), and alarm
output (two relay contacts).
Keep this manual in a safe place.
59±0.3
Fig. 4.1
4.2 DIN Rail Mounting
Locate the isolator 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
VIEW A
Fig. 4.2
VIEW A (Rear of socket)
DIN rail
Slide lock
Network Solutions Business Divisiion
2-9-32, Naka-cho Musashino-shi, Tokyo 180-8750 Japan
Phone: +81-422-52-7179 Facsimile: +81-422-52-6793
IM 77J01H07-01E
1st Edition Nov. 1999
2nd Edition June 2004
2
NOTE
4.3 Mounting Using a Multi-mounting Base
For mounting using a multi-mounting base, see the Instruction
Manual for VJCE (VJ Mounting Base).
4.4 Using Ducts
Wiring ducts should be installed at least 30 mm away from the top
or bottom of the main unit.
4.5 I
n case of top-and-bottom close mounting
Transmitter should be mounted horizontally with its top and bottom slits being vertical. The top and bottom slits should not be
covered.
The area for wiring is required above and below the transmitter
(the area with slant lines).
40 or more40 or more
ALM1
ALM1
ALM1
ALM2
ALM2
29.5 or more
ALM1
ALM1
ALM2
ALM2
(72)
(72)
(29.5)
78 or more
150 or more
ALM2
ALM1
ALM2
• For mounting, use M3 screws and crimp-on terminals with insulating sleeves appropriate for the wires used.
Tool of the crimp-on terminals to be used should be appropriate for the crimp-on terminals.
• Mount a breaker on the external place.
Mount a switch or 5A circuit breaker on the place near by the
instrument, within operator’s reach. And attach the indication
that it is for disconnecting the instrument.
Input signal
Analog input
+
1
R
-
3
R: 100 Ω
Externally
connected for
current input
Shunt resistor
(Externally connected
for current input)
Output-2 signal
ALM1
COM
ALM2
RS-485
communication
B+
2
A-
5
6
COM
3 2
56
1011
1
4
789
Analog output
+
2
-
5
Output-1 signal
Analog output
+
7
-
9
Alarm output
2
5
6
Fig. 4.3
5. INSTALLATION LOCATION
• For installation, avoid any location where the product may be
subject to vibrations, corrosive gases, or large amounts of
dust, or where the product is exposed to water, oil, solvents,
direct sunlight, radioactive rays, or strong electric or magnetic
fields.
• If there is a possibility that lightning could induce a high surge
voltage on the power and signal lines, provide lightning arresters on the line between the field instrument and indoor instrument in order to protect the product. Install a dedicated arrester on the field side and another on the indoor side.
6. EXTERNAL WIRING
WARNING
Turn OFF the power supply and make sure that none of the
cables are not in the hot-line state before carrying out the
wiring to avoid the possibility of electric shock.
Wires are connected to the terminals of the isolator’s socket. M3
screw terminals are provided for the connection of external signals.
Attach a crimp-on lug to each wire for connection to the terminals.
• Recommended cables: A nominal cross-sectional area of 0.5
mm2 or thicker for signal cables, and that of 1.25 mm2 or
thicker for power cables, and shielded twisted-pair cables
(AWG24) for communication wiring cables.
Power supply
L+
10
N-
11
GND
8
Fig. 6.1
● Keep all sources of noise away from the power and sig-
nal cables. Otherwise, accuracy cannot be assured.
● Provide grounding to a grounding resistance of 100 ⍀.
The length of the grounding cable should be 20 m or
less. Directly connect the lead from the ground terminal
(terminal no. 8) of the isolator to the ground. Do not
carry out daisy-chained inter-ground terminal wiring.
● Direct Current
●
“Overvoltage category (Installation category)” describes
a number which defines a transient overvoltage condition. It implies the regulation for impulse withstand voltage. “II” applies to electrical equipment which is supplied from the fixed installation like distribution board.
●
“Pollution degree” describes the degree to which a solid,
liquid, or gas which deteriorates dielectric strength or
surface resistivity is adhering. “2” applies to normal indoor atmosphere. Normally, only non-conductive pollution occurs. Occasionally, however, temporary conductivity caused by condensation must be expected.
● Rated fuse of 125VDC, 1A is stored. However, opera-
tors can not replace the fuse.
All Rights Reserved. Copyright © 1999, Y okogawa M&C Corporation IM 77J01H07-01E 3rd Edition Mar.31,1997-00
3
NOTE
IMPORTANT
● If this instrument is used in a manner not sepecified in
this manual, the protection provided by this instrument
may be impaired.
● If the product is operated by a power supply exceeding
the specifications, the product may become extremely
hot and, as a result, damaged. To prevent this, ensure
the following before turning on the power.
(a) The voltage of the supplied power and the input
signal level meet the specifications of the product.
(b) External wires are connected to the correct termi-
nals (refer to Chapter 5).
● Do not operate the product in the presence of flammable
or explosive gases or vapors. To do so is highly dangerous.
● 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.
7. DESCRIPTION OF FRONT PANEL
AND CONNECTION OF HANDY
TERMINAL
7.1 Front Panel
The communications connector in the front panel is used for setting up parameters through the Handy Terminal. The alarm-1 and
alarm-2 LEDs light up if an alarm occurs (those LEDs are provided only when the output-2 is specified for alarm output).
7.2 Connecting the Handy Terminal
Connect the modular jack-to-connector adapter to the connection
cable (with 5-pin connector) of the Handy Terminal and then connect this adapter to the communications connector of the distributor.
Communications connector
(for connecting the
Handy T erminal)
(lights up if an alarm occurs)
(lights up if an alarm occurs)
* The LEDs are provided only when output-2
is specified for alarm output.
Alarm-1 LED
Alarm-2 LED
Fig. 7.1 Front Panel
F9182EE
Connection cable (optional)
JHT200
Handy T erminal (optional)
Fig. 7.2 Connecting the Handy Terminal
ALM1
ALM2
Communications
connector
E9786WH
Modular jack-to-connector
adapter (optional)
VJ Series
8. SETTING PARAMETERS
Set the parameters using the Handy Terminal. Refer to the list of parameters in this manual and the Instruction Manual for Handy Terminal (IM JF81-02E).
8.1 Settings Related to Inputs and Outputs
8.1.1 Input Type
Set by selecting input type from among VOLTS (DC voltage) and
CURRENT (DC current) in D16: INP TYPE.
8.1.2 Input Hard Range
Set by selecting the input hard range from among AUTO, HIGH,
MIDDLE, and LOW in D17: SELECT RANGE. Generally, select
AUTO.
● AUTO: Sets the input hard range automatically with respect to
the input range to be set.
● HIGH: For a span of 5 V or more in an input range of -10 to
+10 V
● MIDDLE: For a span of 2.5 V or more in an input range of -5
to +5 V
● LOW: For a span of 0.5 V or more in an input range of -1 to
+1 V
The conditions for the input hard range (HIGH, MIDDLE,
and LOW) are specified for operations within the range of
accuracy rating. The input range may be set to a range not
meeting these conditions, but take note of accuracy limitations. Similar accuracy limitations exist even when AUTO
is selected. For more information on accuracy limitations,
see the general specifications of VJH7 (GS 77J1H07-01E).
8.1.3 Input Range
Set the 0% value of input range to D22: INPUT1 L_RANGE and
the 100% value of input range to D23: INPUT1 H_RANGE within
the numerically specified range.
8.1.4 Direction of Output Action
Analog output signals can be reversed. To reverse the signal from
output-1, set D38: OUT1 DR to REVERSE. For output-2, set D39
OUT2 DR to REVERSE. To return the output-1 signal to normal,
set D38: OUT1 DR to DIRECT. For output-2, set D39: OUT2 DR
to DIRECT.
8.2 Settings Related to Communication
Function
Set the following parameters when output-2 is specified for communication function. For more information on the communication
function, see the Instruction Manual for VJ Series Communication
Function (IM 77J1J11-01E).
8.2.1 Communication Protocol
Set the communication protocol by selecting from among PCLINK, PC-LINK WITH SUM, MODBUS ASCII, MODBUS
RTU, and LADDER in F01: PROTOCOL.
8.2.2 Communication Address
Set the address number of the isolator numerically in a range of 1
to 99 in F02: ADDRESS.
8.2.3 Baud Rate
Set the baud rate by selecting from among 1200, 2400, 4800, and
9600 bps in F03: BAUD RATE.
8.2.4 Parity
Select and set NONE, EVEN, or ODD in F04: PARITY.
8.2.5 Data Length
Select and set 7 bits or 8 bits in F05: DATA LEN.
All Rights Reserved. Copyright © 1999, Y okogawa M&C Corporation
IM 77J01H07-01E
3rd Edition Mar.31,1997-00
4
8.2.6 Stop Bit
Select and set 1 bit or 2 bits in F06: STOP BIT.
8.3 Settings Related to Alarm Output
Set the following parameters when output-2 is specified for alarm
output.
8.3.1 Alarm Setpoints
Set the alarm setpoints of alarm-1 and alarm-2 in E03: SET
POINT1 and E04: SET POINT2 numerically.
● Setting range: A range of 0 to 100% of input range
● Setting resolution: 0.1%
8.3.2 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 ⱖ alarm setpoint,
select HIGH ALM.
● To activate alarm status when input signal ⱕ alarm setpoint,
select LOW ALM.
8.3.3 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%
8.3.4 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
E13: OFF DELAY1 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.
8.3.5 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.
9. DESCRIPTION OF ALARM ACTIONS
This chapter describes examples of alarm actions under the following conditions.
metI
noitcamralafonoitceriDNOITCA1MLA:50Emralatimil-hgiHNOITCA2MLA:60Emralatimil-woL
gnittesmralA1TNIOPTES:10E%082TNIOPTES:20E%51
siseretsyH1SISERETSYH:70E%012SISERETSYH:80E%5
yaledNOmralA1YALEDNO:11E.ces12YALEDFFO:21E.ces3
yaledFFOmralA1YALEDFFO:31E.ces22YALEDFFO:41E.ces4
[%]
100
80
60
40
20
15
mralafonoitpircseD
Alarm conditions established
[1] [2]
1 sec.
Alarm conditions established
Normal conditions established
Normal conditions established
High-limit alarm ON
Alarm-1 ON delay
Alarm-2 hysteresis (5%)
2 sec.
Alarm-1 OFF delay
Alarm-2 setpoint (15%)
snoitca
1-mralA2-mralA
retemaraPtniopteSretemaraPtniopteS
.lamronotsnrutersutatseht,sdnoces2
[1]: Alarm status does not continue for more than 1 second after the
High-limit alarm OFF
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 setpoint (80%)
Alarm-1 hysteresis (10%)
Alarm conditions
established
Alarm conditions
established
[3] [4]
tupniehterehwnoitidnocehtfisdnuosmralaehT
seunitnocmralatimil-hgihfoeromro%08sieulav
,sdnuosmralaehtretfA.dnoces1nahteromrof
nahtsselsieulavtupnierehwnoitidnocehtnehw
nahteromrofseunitnocmralatimil-hgihehtfo%07
Low-limit alarm ON
Alarm-2 ON delay
Normal conditions
established
3 sec. 4 sec.
Alarm-2 OFF delay
Normal conditions
established
Low-limit alarm OFF
tupniehterehwnoitidnocehtfisdnuosmralaehT
seunitnocmralatimil-wolfosselro%51sieulav
,sdnuosmralaehtretfA.sdnoces3nahteromrof
nahteromsieulavtupnierehwnoitidnocehtnehw
nahteromrofseunitnocmralatimil-wolehtfo%02
.lamronotsnrutersutatseht,sdnoces4
Alarm-1 action
Alarm-2 action
0
Normal
Alarm
Normal Alarm Normal
Normal
Elapsed time
All Rights Reserved. Copyright © 1999, Y okogawa M&C Corporation IM 77J01H07-01E
1 sec.
10.LIST OF PARAMETERS
1011
3 2
1
4
56
789
11
10
8
L+
N-
GND
Power supply
9
7
Analog output
Output-1 signal
Voltmeter
R
R: For current output using 250 Ω
precision resistor
Voltage and
current
generator
+
-
5
2
Analog output
Output-2 signal
Voltmeter
R
R: For current output using 250 Ω
precision resistor
+
-
Input signal
3
1
+
-
Analog input
R
R: 100 Ω
Externally connected
for current input
Shunt resistor
(Externally connected
for current input)
.oNmetIyalpsiDskrameR.oNmetIyalpsiDskrameR
10ledoMLEDOM
20.ongaTONGAT
30tluserkcehc-fleSKHCFLES
A1yalpsiD1YALPSIDB2yalpsiD2YALPSID
10AeulavtupnI1TUPNI10B1eulavtupnI1TUPNI
50A1eulavtuptuO1TUPTUO50B1eulavtuptuO1TUPTUO
60A2eulavtuptuO2TUPTUO60B2eulavtuptuO2TUPTUO
70Asutats1-mralASUTATS1MLA06Btluserkcehc-fleSKHCFLES
80Asutats2-mralASUTATS2MLA
71AsutatSSUTATS1*
81A.on.veRONVER
02A.veruneMVERUNEM
06Atluserkcehc-fleSKHCFLES
D)O/I(gnitteS)O/I(TESE)tuptuomrala(gnitteS)MLA(TES
10D1.ongaT1.ONGAT10Egnittes1-mralA1TNIOPTES
20D2.ongaT2.ONGAT20Egnittes2-mralA2TNIOPTES
30D1tnemmoC1TNEMMOC30Egnittes1-mralA1TNIOPTES
40D2tnemmoC2TNEMMOC40Egnittes2-mralA2TNIOPTES
61DepyttupnIEPYTPNI50Enoitca1-mralafonoitceriDNOITCA1MLA
71DegnardrahtupnifonoitceleSEGNARTCELES60Enoitca2-mralafonoitceriDNOITCA2MLA
22DegnarwoltupnIEGNAR_L_1TUPNI90Esiseretsyh1-mralA1SISERETSYH
32DegnarhgihtupnIEGNAR_H_1TUPNI01Esiseretsyh2-mralA2SISERETSYH
83Dnoitca1-tuptuofonoitceriDRD1TUO11EgnittesyaledNO1-mralA1YALEDNO
93Dnoitca2-tuptuofonoitceriDRD2TUO21EgnittesyaledNO2-mralA2YALEDNO
06Dtluserkcehc-fleSKHCFLES31EgnittesyaledFFO1-mralA1YALEDFFO
.deificeps
PtnemtsujdA1TSUJDAQtseTTSET
20P1-tupnifotnemtsujdaoreZ1JDAOREZ10QCJRfoFFO/NOCJR
30P1-tupnifotnemtsujdanapS1JDANAPS20Q1tuptuodecroFTSET1TUO
21P1-tuptuofotnemtsujda%0%01TUO30Q2tuptuodecroFTSET2TUO
31P1-tuptuofotnemtsujda%001%0011TUO40Q)1mrala(tuptuodecroFTSET1MLA
41P2-tuptuofotnemtsujda%0%02TUO50Q)2mrala(tuptuodecroFTSET2MLA
51P2-tuptuofotnemtsujda%001%0012TUO06Qtluserkcehc-fleSKHCFLES
71P
ecnatsiser
06Ptluserkcehc-fleSKHCFLES
tupnilanretxefotnemtsujdA
smetiyalpsiD
1*yrotsiheesotlennosrepecivresrofdeyalpsidsisutatSehT
.sdrocer
smetignitteS
41EgnittesyaledFFO2-mralA2YALEDFFO
51Enoitcayaler1-mralafonoitceriDNOITCA1LR
61Enoitcayaler2-mralafonoitceriDNOITCA2LR
06Etluserkcehc-fleSKHCFLES
F)noitacinummoc(gnitteS)MOC(TES
10FlocotorpnoitacinummoCLOCOTORP
si2-tuptuotahwnognidnepeddeyalpsidtonsmetieraerehT
20FsserddASSERDDA
30FetarduaBETARDUAB
40FytiraPYTIRAP
50FhtgnelataDNELATAD
60FtibpotSTIBPOTS
smetignitsujdA smetitseT
JDAROTSISER
06Ftluserkcehc-fleSKHCFLES
5
11.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
specified performance.
For cleaning the instrument, use a soft and dry cloth.
11.1 Calibration Apparatus
● A voltage and current generator (Yokogawa 7651 or the
equivalent)
● A voltmeter (Yokogawa 7562 or the equivalent)
●
A precision resistor of 250 ⍀ ± 0.01%, 1 W (for current output)
11.2 Calibration Procedure
Connect the instruments as shown in Fig. 10.1. First adjust the output-1 signal and then the output-2 signal.
Produce input signals equivalent to 0, 25, 50, 75, and 100% of the
input span from the voltage and current generator to the isolator.
Then, check that the isolator’s output signal shows voltages corresponding to 0, 25, 50, 75, and 100% of the input span within the
rated accuracy range.
If the output signal is out of the rated accuracy range, adjust the
output signal level using the Handy Terminal (JHT200).
All Rights Reserved. Copyright © 1999, Y okogawa M&C Corporation
Fig. 11.1
IM 77J01H07-01E
Loading...