Yokogawa MH5D User Manual

User’s
Manual

Model MH5D
Isolator
(2-output, Free Range Type)

IM 77J04H05-02E

Please read through this User’s Manual before use for correct handling.
Please keep this User’s Manual for future reference.

IM 77J04H05-02E

1st Edition Jul. 2005 (YK)

Network Solutions Business Division

2-9-32, Naka-cho Musashino-shi, Tokyo 180-8750 Japan
Phone: [phone] Facsimile: [phone]

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 use.

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.

CHECKING PRODUCT SPECIFICATIONS AND PACKAGED ITEMS

(1) Checking the Model and Product Specifications

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

(2) Packaged Items

Check that the package contains the following items:

● MH5D: 1

● Receiving resistor (for currrent input): 1

● Spacer (for DIN rail mounting): 1

● Range label: 1

● User’s Manual (this manual: IM 77J04H05-02E): 1
✻ The 250 Ω receiving resistor is attached for the optional specifica-

tion “/R250”; the 100 Ω receiving resistor is attached for the op­tional specification “/R100.”

MODEL AND SUFFIX CODES

Model

Output

2: 2 points

Power supply

1: 15-40 V DC
6: 100-240 V AC/DC (Operating range: 85 to 264 V)

Input signal

A: −20 to +20 mA DC
B: −50 to +50 mA DC
1: −10 to +10 V DC
2: −2 to +2 V DC
Z: (Custom order)

Customized current signals or voltage signals

Output-1 signal

A: 0 to 20 mA DC Span is 5 mA or more
B: 0 to 5 mA DC Span is 1 mA or more
1: −10 to +10 V DC Span is 0.1 V or more
2: −100 to +100 mV DC Span is 10 mV or more
Z: (Custom order)

Customized current signals or voltage signals

Output-2 signal

A: 4 to 20 mA DC 1: 0 to 10 mV DC
B: 2 to 10 mA DC 2: 0 to 100 mV DC
C:1 to 5 mA DC 3: 0 to 1 V DC
D:0 to 20 mA DC 4: 0 to 10 V DC
E: 0 to 16 mA DC 5: 0 to 5 V DC
F: 0 to 10 mA DC 6: 1 to 5 V DC
G:0 to 1 mA DC 7: −10 to +10 V DC
Z: (Custom order)

Customized current signals or voltage signals

Breakpoint linearization

0: Not available
1: Available

Optional specification

/SN: Without socket
/R100: With 100 Ω receiving resistor
/R250: With 250 Ω receiving resistor

(Operating range: 12 to 48 V)

(with 250 Ω receiving resistor)

MH5D -02 - /

(with 100 Ω receiving resistor)

GENERAL

The MH5D is a plug-in type isolator that converts DC current or DC volt­age signals into isolated DC current or DC voltage signals.

1

1. MOUNTING METHOD

NOTE

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.

1.1 Wall Mounting

Unfasten the upper and lower stoppers of the isolator to disconnect the
main unit from the socket. Next, anchor the socket onto the wall with
two M4 screws. Then, plug the main unit into the socket and secure
the main unit with the upper and lower stoppers.

Stopper

Main unit

Mounting screws

[Mounting Dimensions]

Socket

2-4.5 or 2-M4

400.2

Pitch: 56 or more

5 or more

(51)

Unit: mm

(85)

1.2 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.

Socket

Note:

• When mounting the units
close together, leave a space
of at least 5 mm between
them.

• Use the supplied spacer to
keep a space of 5 mm for
DIN rail mounting.

2. INSTALLATION LOCATIONS

● Avoid the following environments for installation locations:
Areas with vibration, corrosive gases, dust, water, oil, solvents, di­rect sunlight, radiation, a strong electric field, and/or a strong
magnetic field
Installation altitude: 2000 m or less 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 isola­tor and a field-installed device.

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

3. 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.

Wires are connected to the terminals of the isolator’s socket. M3.5
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 mm
or thicker for signal cables, and that of 1.25 mm2 or thicker for
power cables.

Receiving resistor

for current input

Power Supply

L+

7

N−

8

9

8 7 6 5

10 11

1 2

GND

Output-2 Output-1

+

10

−

11

R

: Receiving resistor

for current input

4

39

Input

1

2

+

5

R

6

−

+

−

2

Fit into here

DIN rail

Push

DIN rail

(Rear of socket)

Spacer

Slide lock

1.3 Using Ducts

Wiring ducts should be installed at leaset 30 mm away from the top or
bottom of the main unit.

External receiving resistor for current input:

Be sure to attach a supplied 100 Ω or 250 Ω receiving resistor for
current input.

IMPORTANT

●

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.

9) of the product to the ground. Do not carry out daisy­chained inter-ground terminal wiring.

●

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.

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IM 77J04H05-02E 1st Edition Jul 29, 2005-00

Power Supply and Isolaion

Power supply rated voltage:

15-40 V DC or 100-240 V AC/DC 50/60 Hz

Power supply input voltage:

15-40 V DC (±20%) or 100-240 V AC/DC (−15, +20%) 50/60
Hz

Power consumption:

24 V DC 2.3 W, 110 V DC 2.2 W
100 V AC 4.6 VA, 200 V AC 6.4 VA

Insulation resistance:

100 MΩ at 500 V DC between input, output, power supply, and
grounding terminals mutually.

Withstand voltage:

2000 V AC for 1 minute between input, output, power supply and
grounding terminals mutually.
1000 V AC for 1 minute between output-1 and output-2 terminals.

4. DESCRIPTION OF FRONT PANEL

The figure below shows the isolator of which the front panel cover is
open.

Connector for
communication

Selection
switch

Adjustment
switch

4.1 Operation Indicating Lamp

The operation indicating lamp shows the operation status, abnormali­ties in a setting, and adjustment operation status by the adjustment
switch on the front panel.

(1) When the lamp is lit:

Power is turned on and the isolator is in the normal status pro­vided that the selection switch is set to the position “0.”

(2) When the lamp is blinking rapidly:

The lamp repeats the rapid blinking until the internal processing is
completed during I/O adjustments by the adjustment switch.

(3) When the lamp is blinking slowly:

The lamp repeats the slow blinking until the isolator regains its
normal status when the following abnormalities occur.

• Abnormalities in a parameter setting

• The selection switch is set to the positions other than “0.”

• Input is outside of the range of −10 to 110%.

4.2 Connector for Communication

Use the connector for communication when setting the parameters us­ing a PC (VJ77 Parameter Setting Tool) or the Handy Terminal.

< How to connect with the setting tool>

JUXTA communication cable with
5-pin connector (F9182EE)

JHT200
Handy T erminal

[Provided with VJ77 and JHT200]

Operation indicating lamp:
Turns on at power on.

4.3 Selection Switch and Adjustment Switch

The following adjustments can be performed using the switches on the
front panel (selection switch and adjustment switch) without the dedi­cated setting tool (refer to “4.2 Connector for Communication”).
The adjusted value is saved about 1 second after operating the adjust­ment switch. Also when the rotation direction of the adjustment switch
is changed, the adjusted value becomes effective about 1 second after
the change.

Position of selection switch

0

No function

1

Output-1 zero adjustment

2

Output-1 span adjustment

3

Output-2 zero adjustment

4

Output-2 span adjustment

5

Input zero adjustment

6

Input span adjustment

Rotation direction of adjustment switch

Clockwise

Counterclockwise

Increase of output adjusted value and
adjustment of input
Decrease of output adjusted value and
reset of input adjusted value

Item to be adjusted

Adjustment operation

[Adjusted volume by the adjustment switch]

One click changes about 0.005% of output range.

4.3.1

Adjusting Output Using the Switches on the Front
Panel

(1) Output-1 zero adjustment

Apply the 0% input signal. Turn the selection switch to “1.” Then
turn the adjustment switch clockwise to increase the output, or
turn it counterclockwise to decrease the output.

(2) Output-1 span adjustment

Apply the 100% input signal. Turn the selection switch to “2.”
Then turn the adjustment switch clockwise to increase the output,
or turn it counterclockwise to decrease the output.

Output-2 can be adjusted by the same operation as the above.

(3) Output-2 zero adjustment

Apply the 0% input signl. Turn the selection switch to “3.” Use the
adjustment switch for adjustment.

(4) Output-2 span adjustment

Apply the 100% input signal. Turn the selection switch to “4.” Use
the adjustment switch for adjustment.

4.3.2

Adjusting Input Using the Switches on the Front
Panel

When performing the zero/span adjustment of input, be sure to turn the
adjustment switch counterclockwise to reset the adjusted value at first.

(1) Input zero adjustment

Apply the 0% input signal. Turn the selection switch to “5.” Then
turn the adjustment switch clockwise to adjust the input read
value, or turn it counterclockwise to reset the adjusted value.

(2) Input span adjustment

Apply the 100% input signal. Turn the selection switch to “6.” Then
turn the adjustment switch clockwise to adjust the input read
value, or turn it counterclockwise to reset the adjusted value.

NOTE

●

Be sure to set the selection switch back to the position
“0” after each adjustment. Otherwise it may cause an
incorrect operation or malfunction because the
positions other than “0” are adjustment modes.

●

When the selection switch is set to the positions other
than “0”, the setting tool can not be used for the setting.

Dedicated cable (E9786WK)
[Provided with VJ77]

PC which is installed
with the VJ77.

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

Dedicated adapter (E9789HA)
[Provided with VJ77]

*: Use the VJ77 of version R1.04 or later.

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IM 77J04H05-02E 1st Edition Jul 29, 2005-00

5. SETTING PARAMETERS

Set the parameters using a PC (VJ77 Parameter Setting Tool) or the
Handy Terminal. Refer to “6. List of Parameters” in this manual and the
User’s Manual for VJ77 PC-based Parameters Setting Tool (IM
77J01J77-01E) or the User’s Manual for JHT200 Handy Terminal (IM
JF81-02E). Parameters are indicated inside the [ ].

5.1 Setting Square Root Extractor

Set “with square root extractor” or “without square root extractor” in
[D14: LINEARIZE]. “SQR” for “with square root extractor” and “OFF”
for “without square root extractor.”

5.2 Setting Lowcut Point

Set a numeric value in [D15:LOW CUT] when “with square root extrac­tor” is selected.

● Setting range: 0.3 to 100% of the input range (setting resolution:

0.1%)

Output signal

(Y)

Y=X

0

Hysteresis

(approx. 0.2% fixed)

5.3 Setting Breakpoint Linearization

(1) Set the breakpoint linearization in [D14: LINEARIZE].

Select “ON” to use the breakpoint linearization.
Select “OFF” not to use the breakpoint linearization.

(2) Set the breakpoints data.

Set the input breakpoints data in [M01: X TABLE] to [M32: X
TABLE].
Set the number of breakpoints data in [M33: MAX POINT].
Set the output breakpoints data in [N01: Y TABLE] to [N32: Y
TABLE].

● Setting condition of breakpoints data
Maximum number of breakpoints: 32
Setting range: −6 to 106% (both input and output)

• Set a relationship between the input and outpout at % value to

the span.

• With 4 significant digits; can be set to the second place of a

decimal point.

• For input: −6.00X0X1X2…Xn-1Xn106.0%

• For output: −6.00Y0Y1 to Yn106.0%

5.4 Setting Input Range

Set the input range 0% in [D27:INPUT1 L_RNG], and the input range
100% in [D28:INPUT1 H_RNG].

5.5 Setting Output-1 Range

Set the output-1 range 0% in [D38:OUT1 L_RNG], and the output-1
range 100% in [D39:OUT1 H_RNG].

NOTE

Changing the input range or output-1 range resets the
adjusted value.

Input signal (X)

Lowcut point

6. LIST OF PARAMETERS

Parameter Display Item

MODEL
TAG NO
SELF CHK

A

DISPLAY1

A01

INPUT1

A07

OUTPUT1

A08

OUTPUT2

A54

STATUS

A56

REV NO

A58

MENU REV

A60

SELF CHK

B

DISPLAY2

B01

INPUT1

B07

OUTPUT1

B08

OUTPUT2

B60

SELF CHK

D

SET (I/O)

D01

TAG NO.1

D02

TAG NO.2

D03

COMMENT1

D04

COMMENT2

D14

LINEARIZE

D15

LOW CUT

D20

INP TYPE

D22

IN RESIST

D27

INPUT1 L_RNG

D28

INPUT1 H_RNG

D38

OUT1 L_RNG

D39

OUT1 H_RNG

D40

OUT2 L_RNG

D41

OUT2 H_RNG

D49

OUT1 DR

D50

OUT2 DR

D60

SELF CHK

M

X TABLE

M01

X TABLE

M02

X TABLE

:

:

M31

X TABLE

M32

X TABLE

M33

MAX POINT

M60

SELF CHK

N

Y TABLE

N01

Y T ABLE

N02

Y T ABLE

:

:

N31

Y T ABLE

N32

Y T ABLE

N60

SELF CHK

P

ADJUST

P08

IN1 ZERO ADJ

P09

IN1 SPAN ADJ

P26

OUT1ZERO ADJ

P27

OUT1SPAN ADJ

P28

OUT2ZERO ADJ

P29

OUT2SPAN ADJ

P60

SELF CHK

Q

TEST

Q03

OUT1 TEST

Q04

OUT2 TEST

Q60

SELF CHK

*1 The displayed status is to let the service staff know the past records of the

product.
*2 The parameter becomes effective when "SQR" is selected in [D14:LINEARIZE].
*3 The parameters are the items to be set at the factory.

Model
Tag number
Self-check result

Display1

Input-1
Output-1
Output-2

*1

Status
REV No.
MENU REV
Self-check result

Display2

Input-1
Output-1
Output-2
Self-check result

Setting (I/O)

Tag number-1
Tag number-2
Comment-1
Comment-2
Linearization
Lowcut point
Input type
Input resistance

*2

*3

*3

Input-1 low range
Input-1 high range
Output-1 low range
Output-1 high range
Output-2 low range
Output-2 high range
Direction of output-1 action
Direction of output-2 action
Self-check result

Input breakpoints table

Input breakpoints data
Input breakpoints data
:
Input breakpoints data
Input breakpoints data
Number of breakpoints
Self-check result

Output breakpoints table

Output breakpoints data
Output breakpoints data
:
Output breakpoints data
Output breakpoints data
Self-check result

Adjustment

Input-1 zero adjustment
Input-1 span adjustment
Output-1 zero adjustment
Output-1 span adjustment
Output-2 zero adjustment
Output-2 span adjustment
Self-check result

Test

Forced output-1
Forced output-2
Self-check result

*3

*3

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IM 77J04H05-02E 1st Edition Jul 29, 2005-00

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
specified performance.

7.1 Calibration Apparatus

● A DC voltage/current standard (Yokogawa 7651 or the equivalent)

● A digital multimeter (Yokogawa 7561 or the equivalent)

● A precision resistor of 250 Ω ±0.01%, 1 W

● A setting tool for adjustment

(Refer to “4.2 Connector for Communication” in this mnual.)

7.2 Calibration Procedure

(1) Connect the instruments as shown below. First adjust the output-1

signal and then the output-2 signal.

(2) Use the DC voltage/current standard and apply input signals

equivalent to 0, 25, 50, 75, and 100% of the input span to the iso­lator. When “with square root extractor” is selected, apply input
signals equivalent to 0, 6.25, 25, 56.25, and 100% of the input
span to the isolator.

(3) Check to see the corresponding output voltages are 0, 25, 50, 75,

and 100% respectively and within the specified accuracy rating.
“R0” is used for current output.

● Use the setting tool (VJ77 Parameter Setting Tool or JHT200
Handy Terminal) or the switches on the front panel (selection
switch and adjustment switch) to adjust the input/output signals.

Input Adjustment Procedure

(1) Input the value equivalent to 0% value of input range.
(2) Call the display item (A: DISPLAY1) to check the input value in

A01: INPUT1.

(3) If the adjustment is necessary, call the adjustment item (P: AD-

JUST).

(4) Select P08: IN1 ZERO ADJ to enter the adjustment mode. Select

EXECUTE (adjustment) for adjustment. (If RESET is selected,
the adjusted value is reset to the factory-set default.)

(5) Input the value equivalent to 100% value of input range.
(6) Call the display item (A: DISPLAY1) to check the input value in

A01: INPUT1.

(7) If the adjustment is necessary, call the adjustment item (P: AD-

JUST).

(8) Select P09: IN1 SPAN ADJ to enter the adjustment mode. Select

EXECUTE (adjustment) for adjustment. (If RESET is selected,
the adjusted value is reset to the factory-set default.)

Output Adjustment Procedure

(1) When adjusting 0% value of output-1, call the adjustment item (P:

ADJUST) to select P26: OUT1ZERO ADJ.

(2) If it slips out to (+) side, set (−) value equivalent to slipout; if slips

out to (−) side, set (+) value equivalent to slipout.

*: The 100% value of output-1 and the 0% value and 100% value of

output-2 can be adjusted by the same operation as the above.
For adjustment using a setting tool, refer to the User’s Manual for

each setting tool and “6. List of Parameters” in this manual.
For adjustment using the switches on the front panel, refer to “4.3
Selection Switch and Adjustment Switch.”
User’s Manual for VJ77 [Document No.: IM 77J01J77-01E]; how­ever, use the VJ77 of version R1.04 or later.
User’s Manual for JHT200 [Document No.: IM JF81-02E]

Receiving resistor

for current input

Power supply

L+

N−

GND

Output-2

+

10

Digital

Ro

multimeter

11

−

Ro

: 250 Ω precision resistor

for current output

7

8

9

8 7 6 5

10 11

1 2

4

39

Input

+

5

DC voltge/
current

Ri

standard

−

6

Ri

: Receiving resistor for

current input

Output-1

+

1

Digital

Ro

multimeter

2

−

Ro

: 250 Ω precision resistor

for current output

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IM 77J04H05-02E 1st Edition Jul 29, 2005-00