Yokogawa VJQ8 User Manual

User's Manual

Model VJQ8 Pulse to Analog Converter

(Isolated Single-output and Isolated Dualoutput Types)

Thank you for purchasing the JUXTA Signal Conditioner. Please read through this manual before use for correct handling.

IM 77J01Q08-01E

4th Edition Mar. 2012(YK)

Network Solutions Business Division

2-9-32, Naka-cho Musashino-shi, Tokyo 180-8750 Japan Phone: +81-422-52-7179 Facsimile: +81-422-52-6619

CAUTIONARY NOTES FOR SAFE USE OF THE PRODUCT

This User’s Manual should be carefully read before installing and operating the product. The following symbol is used on the product and in this manual to ensure safe usage.

This symbol is displayed on the product when it is necessary to refer to the User's Manual for information on personal and instrument safety. This symbol is displayed in the User's Manual to indicate precautions to avoid danger to the operator, such as an electric shock.

The following symbols are used only in this manual.

Note

Draws attention to essential information for understanding the operations and/or functions of the product.

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:

• VJQ8: 1

• Tag number label: 1

• Range label: 1

• Shunt resistor (when optional code “/R□” is specied): 1

• User's Manual (this manual)

GENERAL

This plug-in type pulse to analog converter receives contact pulse, voltage pulse, or current pulse from the eld and converts the signal into isolated DC current or voltage signals.

• Output-2 can be selected from DC voltage signal, DC current signal, communication function (RS-485), or alarm output (2 relay contacts).

• Various parameters such as input range can be set and modied using a PC (VJ77) or Handy Terminal (JHT200 and the like).

MODEL AND SUFFIX CODES

Model Sufx codes Description

VJQ8 -0 □ □ -□ □ □ 0 /□□ Pulse to Analog Converter

Output conguration

Power supply 6 100-240 V AC/DC

Transmitter Power Supply

Output-1 A 4 to 20mA DC

Output-2 A 4 to 20mA DC

Options Blank: With socket

*1 Operating range: 85-264 V *2 Operating range: 12-36 V *3 DC voltage signal or DC current signal *4 Specify when current pulse input

-0 Always 0 1 Single 2 Dual

7 15-30V DC

-1 12V DC±10%

-2 24V DC±10%

B 2 to 10mA DC C 1 to 5mA DC D 0 to 20mA DC E 0 to 16mA DC F 0 to 10mA DC G 0 to 1mA DC 1 0 to 10mV DC 2 0 to 100mV DC 3 0 to 1V DC

4 0 to 10V DC 5 0 to 5V DC 6 1 to 5 V DC 7 −10 to +10V DC Z (Custom Order)

6 1 to 5V DC P Communication function

T Alarm output

N None

0 Always 0

(RS-485)

(2 relay contacts)

/SN Without socket /R100 With 100 Ω shunt resistor /R220 With 220 Ω shunt resistor /R510 With 510 Ω shunt resistor /R1000 With 1000 Ω shunt resistor

(*4)

/R2200 With 2200 Ω shunt resistor

(*4)

[STYLE: S1]

(*1)

(*2)

(*3)

(*4)

1. MOUNTING METHOD

Mounting

Input

Note

Insert/pull out the main unit into/from the socket vertically to the face of socket. Otherwise the terminals are bent and it may cause a bad contact.

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

or thicker for signal cables, and that of 1.25 mm2 or

0.5 mm thicker for power cables.

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.

Mounting Dimensions

Socket

59±0.3

29.5 or more

22±0.2

Unit: mm

2-M4 or 2-ø4.5 or more

Main unit

screws

Main unit-fixing screw

Threaded hole for fixing the main unit

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

Fit into here

DIN rail

Push

(Rear of socket)

DIN rail

Slide look

1.3 Mounting Using

When using a multi-mounting base, see the User's Manual for VJCE (VJCE 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 LOCATION

• Avoid the following environments for installation locations: Areas with vibration, corrosive gases, dust, water, oil, solvents, direct sunlight, radiation, a strong electric eld, and/or a strong magnetic eld, altitude of more than 2000m above sea level.

• 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 this converter and a eld-installed device.

• Operating temperature/humidity range: 0 to 50C/5 to 90%RH (no condensation)

3. EXTERNAL WIRING

WARNING

Be sure to turn OFF the power supply before wiring to avoid the risk of electric shock. Use a tester or similar device to ensure that no power is being supplied to a cable to be connected.

When receiving non-voltage contact signal or voltage pulse

Transmitter

Shunt resistor

(at current pulse input)

Power supply

1110 8

N–

L+

Note

● Do not use output-2 for the 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.

● The grounding resistance must be 100 Ω (JIS

Class D grounding). 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

● 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 external wiring to the terminals and wiring to ground

● Do not operate the product in the presence of

ammable 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.

● The use of inductance (L) loads such as auxiliary

relays and solenoid valves causes malfunction or relay failure; always insert a CR lter or diode for spark-removal into the line in parallel with the load. Recommended CR

● For 15-30 V DC (±20%) power supply, as a safety

measure, always install a circuit breaker (an IEC 60947-compatible product, 1 A, 30 V DC) in an easily accessible location near the instrument. Moreover, provide indication that the switch is a device for turning off the power to the instrument.

When receiving current pulse by running a transmiter on an internal power supply

Transmitter

−

R: Shunt resistor

GND

When receiving voltage pulse by running a transmiter on an internal power supply

PS+

Transmitter

−

3 2

789

1011

PS+

−

Output-2

Analog output

–

Output-1

Analog output

–

Alarm output

ALM1

COM

ALM2

RS-485

Communication

the product should meet the required specications.

are as specications.

• C: 0.5 to 1F against contact current 1A

• R: 0.5 to 1 against contact voltage 1V

B+

A–

COM

IM 77J01Q08-01E 4th Edition Mar. 02, 2012-00

+ 4 hidden pages