Yokogawa VJU7 User Manual

User’s

/ /

Manual

IM 77J01U07-01E

Model VJU7 Universal Temperature Converter (Isolated Single-output and Isolated Dual-output Types)

1. 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 eusure safe use.

WARNING

This symbol is displayed on the product when it is necessary to refer to the user’s manual for information on personnel and instrument safety. This symbol is displayed in the user’s manual to indicate precautions for avoiding danger to the operator, such as an electric shock.

The following symbols are used only in this manual.

IMPORTANT

Indicates that operating the hardware or software in a particular manner may cause damage or result in a system failure.

NOTE

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

4. MODEL AND SUFFIX CODES

VJU7-0 -

Model Number of outputs

1: 1 output 2: 2 outputs

Power supply 6: 100-240 V AC/DC 7: 15-30 V DC (Operating range: 12 to 36 V)

Input signal U: Thermocouple, RTD, mV signal

Output-1 signal A: 4 to 20 mA DC 6: 1 to 5 V DC Z: (Custom Order) DC current or voltage signal

Output-2 signal A: 4 to 20 mA DC 6: 1 to 5 V DC P: Communication function (RS-485) T: Alarm output (2 relay contacts) N: No output-2 signal

Optional specification Blank: With socket

SN: Without socket RJCN: Without RJC sensor

(Operating range: 85 to 264 V)

CHECKING PRODUCT SPECIFICATIONS AND PACKAGED ITEMS

(1) Model and Specifications Check

Check that the model and specifications indicated on the nameplate attached to the side face of the main unit are as ordered.

(2) Contents of the Package

Check that the package contains the following items:

● VJU7: 1

● User’s manual (this manual: IM 77J01U07-01E): 1

Accessories:

● Tag number label: 1 sheet

● Range label: 1 sheet

● RJC sensor (when /RJCN is not specified for the

optional specification): 1

3. GENERAL

This plug-in type Universal Temperature Converter receives thermocouple, RTD or mV signal and converts it into isolated DC voltage or current signal.

• Settings of the input type (thermocouple, RTD or mV) and measurement range can be changed within the specified ranges.

• One of DC voltage signal, DC current signal, communication function (RS-485) and alarm output (2 relay contacts) can be selected for the output-2 signal.

Keep this manual in a safe place.

Network Solutions Business Divisiion

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

IM 77J01U07-01E ©Copyright Nov. 1999 4th Edition: Feb. 2007

5. MOUNTING METHODS

5.1 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.

Socket

Main unit

Main unit-fixing screw

29.5 or more 22±0.2

59±0.3

2-M4 or 2-ø4.5 or more

5.2 DIN Rail Mounting

Locate the VJU7 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.

Fit into here

DIN rail

Push

DIN rail

Hole for main unit-fixing screw

Mounting screws

Unit: mm

(Rear of the socket)

Slide lock

DIN rail

6. INSTALLATION LOCATIONS

•

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.

•

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.

7. 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 carring out wiring work.

Wiring should be connected to the terminals on the socket of the VJU7. The terminals for external connections are of M3 screws. Use crimp-on lugs for connections to the terminals.

• Be sure to use a compensating lead wire for thermocouple input. Recommended cables: A nominal cross-sectional area of 0.5 mm2 or thicker for output signal cable, a nominal cross-sectional area of 1.25 mm2 or thicker for power cable and shielded twisted-pair cable (AWG24) for communication cable.

RJC sensor

Input signal

Make the wiring resistance of RTD input terminals 1 and 3 the same.

Recommended crimp-on lug size

(Unit: mm)

(Input type can be changed.)

–

5.5 or less

(for thermocouple input)

RTD

Thermocouple

Power supply

Signal line

RJC sensor

Terminal screw

ø3.2 to 3.5

5.5 or more

RJC

L+

N–

GND

–

Ouptut-1 signal

Analog output

3 2

1011

–

Output-2 signal

Analog output

–

Alarm output

789

RS-485

B+

A–

COM

ALM1

(NO)

COM

ALM2

(NO)

5.3 Mounting Using a Multi-mounting Base

For mounting using a multi-mounting base, see the user’s manual for VJCE (VJ Mounting Base).

5.4 Using a Duct

Wiring duct should be installed at least 30 mm away from the top and bottom faces of the main unit.

IMPORTANT

●

Connect the RJC sensor at the correct position as shown above. Otherwise tempratures cannot be measured carrectly.

●

Conect the RJC sensor so that it overlaps the input signal line.

●

Handle the RJC sensor lead wire care to prevent disconnection.

●

(

)

[

]

Use of the product ignoring the specifications may cause overheating or damage. Before turning on the power, ensure the following:

(a)Power supply voltage and input signal value

applied to the product should meet the required specifications.

(b)The external wiring to the terminals and wiring to

ground are as specifications.

●

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.

●

If an inductance (L) load such as auxiliary relays or solenoid valves is used, always insert a spark killer for diminishing sparks, such as a CR filter or a diode in parallel with the inductance load. Otherwise a malfunction or relay failure may occur. Refer to the following guidelines for a capacitor and resistor: Capacitor : 0.5 to 1 mF with respect to a contact

current of 1 A

Resistor: 0.5 to 1 W with respect to a contact

voltage of 1 V

●

The power line and input/output signal lines should be installed away from noise-generating sources. Otherwise accuracy cannot be guaranteed.

●

The grounding resistance must be 100 W (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 daisychained inter-ground terminal wiring.

8. DESCRIPTION OF FRONT PANEL ND CONNECTION OF SETTING OOLS

8.1 Front Panel

The communications connector on the front panel is used for setting up parameters using a PC (VJ77 PC-based Parameters Setting Tool) or the Handy Terminal (JHT200). The alarm indicator lamps for alarm 1 and alarm 2 light up if an alarm occurs. (The alarm indicator lamps are added only when the alarm output is specified for the output-2 signal.)

Communication connector

Alarm indicator lamp

(for alarm 1)

Alarm indicator lamp

(for alarm 2)

Fig. 8.1 Front Panel

8.2 Connecting the Setting Tools

Connect the modular jack conversion adapter (E9786WH) to the JUXTA communication cable with 5-pin connector (F9182EE) and then connect this adapter to the communication connector of JUXTA.

ALM1

ALM2

JUXTA communication cable with 5-pin connector (F9182EE)

JHT200 Handy Terminal

PC with th VJ77 installe

Fig. 8.2 Connecting the Setting Tools

Note: The modular jack conversion adapter does not

9. SETTING PARAMETERS

Set the parameters using a PC (VJ77 PC-based Parameters Setting Tool) or the Handy Terminal (JHT200). Refer to the list of parameters in this manual and the user’s manual for VJ77 PC-based Parameters Setting Tool (IM 77J01J77-01E) or JHT200 Handy Terminal (IM JF81-02E).

NOTE

For the input sensor type, input type and temperature unit, the default values of the input range, alarm setpoints and others are pre-defined according to the values to be selected. Set the parameters as follows.

1. Settings related to inputs: Set the parameters in

2. Before setting the parameters related to alarm

9.1 Settings Related to Input and Output

9.1.1 Input Sensor Type and Input Type

Select the input sensor type in D07: SENSOR TYPE. Select TC for thermocouple input, mV for mV input and RTD for RTD input. When you have selected TC in D07, select the TC type to use in D08: TC TYPE. When you have selected RTD in D07, select the RTD type to use in D09: RTD TYPE. Furthermore, for thermocouple or RTD input, select the temperature unit in D15: UNIT.

[Comes with VJ77 and JHT200]

Modular jack conversion adapter (E9786WH) [Comes with VJ77]

Dedicated adapter (E9789HA) [Comes with VJ77]

Dedicated cable

Comes with VJ77

come with the JHT200 Handy Terminal. It is sold separately.

E9786WK

order starting with (1).

(1) Input sensor type (2) Input type (3) Temperature unit for temperature input (4) Input hard range (5) Input range

output and making the adjustments such as wiring resistance correction and output correction, set the parameters described in 1 above. If setting the parameters (1) to (3) in 1 above after setting the parameters related to alarm output or making the adjustment, the setpoint will be changed or the adjustment will be reset to the default.

IM 77J01U07-01E 4th Edition Feb. 09, 2007-00

+ 5 hidden pages