EMD7

Manostar digital sensor
List ofproducts

WO81

EMD7
48×48 type digital fine differential pressure sensor

RoHS• Selectable from eight ranges including 0 to 100 Pa and 0 to 5 kPa
WO71

FR51A

• It is possible to select analog output function in the range of 4 to 20 mA or 1 to 5 V.
• It is possible to select the alarm output type from NPN open collector or PNP open
collector.
• Compatible with 12 to 24 V DC power source• Equipped with abundant additional functions for differential pressure measurement

MS99

including movement average filter, maximum/minimum value memory, and delay
timer

MS99S

• It is possible to set the alarm function mode in accordance with the usage.
• Product compliant with the EU directive and UL standard

MS61A-RA

QDP33

EMD8A

EMD7

EMT1

EMTGP1EMD7D3

EMT1H

EMT6

EMP5A

EMRT1

HWS15A

Accessories
Application

Precautions
Maintenance<Main application fields>• Part of semiconductor
manufacturing equipment• Negative pressure for dust
collector/differential pressure of air
conditioners• Filter pressure loss management• Precision machine manufacturingline• General factory management
equipment<Usage>• Measurement of internal pressure ofindoor device• Detection of clogging of air filter• Measurement of clogging of bug
filter• Measurement of dynamic pressure
at ventilation/exhaust device• Room pressure measurement in aclean room*(Refer to pages 114 to 117)

71

Product code

EMD7

D3

Pressure range code

N

1

D

100

(Example)

Range
Unit
Analog output
Alarm output
Power source

Maximum value

D
E

Pa

1
4

4–20 mA

N
P

NPN transistor

D3

12–24 V DC

◆When making an inquiry or placing an order, specify the above product code.

kPa
1–5 V
PNP transistor

EMD7

Manostar digital sensor
EMD7

List ofproducts

Specifications
Model

WO81

EMD7D3
Alarm output

Pressure unit

Pa, kPa

Pressure measurement
methodDifferential pressure method

Electric signal
conversion method

Variable inductance

Measured gas

Air and noncorrosive gas (liquid cannot be measured)

Pressure-receiving
element

Diaphragm (silicone rubber)

Mounting orientation

Mounting on vertical surface

Instrument bodywithstanding pressure

20 kPa (refer to page 118)

Withstanding pressureof pressure-receiving
element

20 kPa (refer to page 118)

Operating ambient
temperature

0°C to 50°C (no freezing allowed)

Operating ambient
humidity

35% to 85% RH (no condensation allowed)

Compatible pipe

Vinyl pipe or rubber pipe (inner diameter of 4 mm; however, theouter diameter must be 6 mm or lower)

Base polarity

Indicating high-pressure side and low-pressure side with “H”
and “L” marks, respectively, at piping connection base part.

Display

Display section	Seven-segment LED, four red digits
Pressure indication/alarm setting indication,
three digits at maximum(The highest digit indicates the mode.)
Accuracy	± 1.5% FS ± 1 digit (at 20°C)
Temperature characteristics	± 0.15% FS/°C (zero + span)

Zero adjustment
methodPush-type automatic zero return(The displayed value and analog output are adjusted to zero at
the same time.)

Insulation resistance

Between terminal and case
10 MΩ or higher (500 V DC megger)

Withstand voltage

Between terminal and case
500 V AC, 50/60 Hz, for one minute

Exterior material

ABS resin (color: ivory)

Operating altitude

Altitude of 2000 m or below

Protection level

Standard: IEC 60529 Grade code: IP41

Degree ofcontamination

Standard: IEC 60664 Grade: 2(If it is not possible to install this product in a dry clean location,
house it in a housing.)

Accessories

Adapter for panel mounting, terminal cover (already mounted on instrument body)

Output type• EMD7D3N
NPN open collector
One each for upper limit and lower limit
Maximum load current: 100 mA (per output)
Maximum load voltage: 30 V DC or lower
Output saturated voltage: 1 V DC or lower• EMD7D3P
PNP open collector
One each for upper limit and lower limit
Maximum load current: 100 mA (per output)
Maximum load voltage: 30 V DC or lower
Output saturated voltage: 2 V DC or lower
Setting range
Upper limit: 0 to 100% FS
Lower limit: 0 to 100% FS
Hysteresis width can be set in the range of 1 to 5% FS.
Push-type digital setting
Setting method
Output display
Red LED × 2

Analog output

Output type• EMD7D3□1
4 to 20 mA (at pressure of 0 to FS)
Load resistance: 0 to 250 Ω• EMD7D3□4
1 to 5 V (at pressure of 0 to FS)
Load resistance: 10 kΩ or higher
Accuracy± 1.5% FS (at 20°C)
Temperature characteristics± 0.15% FS/°C (zero + span)

WO71

FR51A

MS99

MS99S

MS61A-RA

QDP33
Maximum consumption
current• EMD7D3N (alarm output: NPN transistor type)
Total consumption: 100 mA (internal consumption only)• EMD7D3P (alarm output: PNP transistor type)Internal consumption: 100 mA
Total consumption: 300 mA (including load current for alarm
output of 100 mA × 2)

Power voltage

12 to 24 V DC ± 10% (ripple of 10% or below)

Mass

Approx. 130 g (including terminal cover and adapter for panel
mounting)

Durable vibration

5 to 10 Hz, amplitude of 10 mm,
10 to 50 Hz, acceleration of 39 m/s2 (two hours each for three axial
directions)

Durable impact

100 m/s2 (six times each for three axial directions)

EMD8A

EMD7

EMT1

EMTGP1Pressure range
code

Pressure range

LED display

Ｄ 100

0-100 Pa

0-100

Ｄ 200

0-200 Pa

0-200

Ｄ 300

0-300 Pa

0-300

Ｄ 500

0-500 Pa

0-500

Ｅ

1

0-1 kPa

0.00-1.00Ｅ

2

0-2 kPa

0.00-2.00

Ｅ

30-3 kPa

0.00-3.00

Ｅ5

0-5 kPa

0.00-5.00

EMT1H

Alarm output

EMT6
Analog output

EMP5A

NPN transistor

4–20 mAoror

PNP transistor

1–5 V◆For the use environment, refer to page 118.
Conforming standards
1. EU directive
This product is compliant with the EMC directive of EU.
EMC directive basic requirements Standard No.
(1) EMI (electromagnetic emission) standard.................EN 61000‒6‒3(2) EMS (electromagnetic immunity) standard...............EN 61000‒6‒2
2. UL standard
This product is certified as an UL standard recognition part. It is also certified with Canada Standard (C-UL). However, use this productin accordance with the installation conditions shown in (3) below.
(1) Requirements standard No.................. UL 61010‒1(2) File No................................................... E220685(3) Installation condition............................. As the DC power source to be connected to this product, use NEC (National Electrical Code)Class 2 power source.

EMRT1

HWS15A

Accessories
Application

Precautions
Maintenance

72

EMD7

Manostar digital sensor
List ofproducts

WO81

EMD7
External dimension drawing
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ALARM

MS99

LO

HI

MS61A-RA

7.5

MS99S

48

1

Pa

2

L

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WO71

(3)

59

8

φ9

EMD8A

EMD7

(8)

4.5

12.5
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Terminal arrangement drawing
Terminal (1) Power + (12 to 24 V DC)
Terminal (2) Power − (0 V)
Terminal (3) Alarm output common/analog output negative side
Terminal (4) Lower limit alarm output
Terminal (5) Upper limit alarm output
Terminal (6) Analog output positive side◆Terminal (3) is a shared terminal for alarm output common andanalog output negative side.

EMT1H
7

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EMT6

1

2

3
6

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HWS15A

CautionAccessories
Application

Accessories dedicated to EMD7
Terminal coverPrecautions

Terminal screw tightening torque: 0.7 to 1.0 N·m
Do not tighten to a torque that exceeds the specified value because
doing so breaks the instrument body.

RoHS

Adapter for panel mounting(Auxiliary item)(Auxiliary item)

MaintenanceThis is already installed at the time of purchase of the
instrument.

Item number

TCA-D773

Material

Polycarbonate

Item number

ADPＡ-EMD7

Applicable crimping
terminal

Material

Polyacetal/steel

EMD7

Manostar digital sensor
EMD7

List ofproducts

Operation panel

WO81
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WO71

FR51A

MS99
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MS61A-RA

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QDP33

EMD8A

EMD7

EMT1

EMTGP1

EMT1H

EMT6

EMP5A

EMRT1

HWS15A

Accessories
Application

Precautions
Maintenance

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74

EMD7

Manostar digital sensor
List ofproducts

WO81

EMD7
WiringWhen connecting relays

ＥＭＤ７Ｄ３Ｎ

12‒24 V

WO71

3RZHUFLUFXLW

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MS99

MS99S

１

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When connecting photocouplers
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Alarm operation diagram
Alarm function Upper limit/lower limit individual
detection (alarm function mode 0)

Alarm function Normal/abnormal detection(alarm function mode 1)$ODUP$ODUP
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Accessories
Application

Precautions
Maintenance

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Operation explanation:	Detects an abnormal pressure drop and an abnormal pressure
rise and performs output individually.
The upper limit alarm turns on when the upper limit alarm setting
is exceeded, and the lower limit alarm turns on when the lower
limit alarm setting is exceeded.
Delay timer:	While the delay timer is operating, the lower limit alarm is
prohibited.

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Operation explanation:	O ne output outputs the presence of pressure within or outside
the specified range.
The other output can output the presence of pressure outside orwithin the specified range as the detection state is inverted.
Delay timer:	While the delay timer is operating, only the output of lower limit
side is prohibited.

EMD7

Manostar digital sensor
EMD7

List ofproducts

WO81
Alarm function Upper limit two-step detection (alarm function
mode 2)$ODUP$ODUP$ODUP$ODUP
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Operation explanation:	Pressure rises are detected in two steps. For example, the firststep can be used for an alarm, and the second step can be used
for machine stoppage.
Delay timer:	While the delay timer is operating, none of them is prohibited.

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Operation explanation:	Pressure drops are detected in two steps. For example, the firststep can be used for an alarm, and the second step can be used
for machine stoppage.
Delay timer:	While the delay timer is operating, both the upper limit and lower
limit are prohibited.

Functional block diagram
Alarm function Simplified control (alarm function mode 4)'HWHFWLRQ
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Operation explanation:	This is a simplified control function by which the output is turned
off when the upper limit setting value is reached for one output
and turned on when the lower limit setting value is reached. The
other output makes an inversed output.
Delay timer:	Even during operation of the delay timer, both outputs are notaffected.
Remarks:	Each hysteresis setting is disabled.

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Accessories
Application

Precautions
Maintenance'HOD\
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76

Warranty■Warranty period
The warranty period for our product is one (1) year from delivery to the location specified by the orderer who makes a direct transaction
with us.

■Scope of warranty
If any failure or defect attributable to us becomes clear during the above warranty period, we will repair the product or supply asubstitute product free of charge. However, even during the warranty period, we will exclude the product from the scope of the warranty
if the failure or defect corresponds to any of the following:(1) The failure or defect was caused by an unreasonable condition, environment, handling, or usage not mentioned in the
instruction manual, specifications, and our product catalog.
(2) The failure or defect was caused by a factor other than our product.
(3) The failure or defect was caused by a modification or repair conducted by a party other than us.
(4) The failure or defect was caused by an event that could not be foreseen at the scientific and technical levels at the time of
product shipment from us.
(5) The failure or defect was caused by an external factor not attributable to us, such as acts of God and disasters.
Please note that the warranty mentioned here means the warranty for our individual product, and damage provoked by a failure or
defect of the product is excluded from the scope of the warranty.
*This warranty is valid only in Japan.

Application and usage
Our products are designed and manufactured as general-purpose instruments for general industries.
Therefore, our products are not intended for the following uses, and our products used in such a manner are outside the scope of
application.
(1) Equipment that is anticipated to greatly affect lives and properties, such as nuclear power generation, aviation, railways, marine
vessels, vehicles, and medical devices(2) Utilities that include electricity, gas, and service water(3) Use in outdoor locations and under similar conditions or environments other than those stipulated in the instruction manual(4) Usage to which considerable safety consideration and attention equivalent to (1) and (2) above need to be given

Service■Scope of service
Because the product price does not include service expenses, such as the dispatch of engineers, we will separately charge for the
expenses in the following cases:(1) Instruction for installation and adjustment and a witnessed test run(2) Maintenance inspection, adjustments, and repairs(3) Technical guidance and technical education(4) Witnessed inspections of products at our factory<<Note>> The product specifications and information in this catalog are subject to change without prior notice for product improvement orother reasons.

●For order placement, contact

Generalagent

Manostar Shop Co., Ltd.

1-2-3 Nishishiriike-cho, Nagata-ku, Kobe City, Hyogo 653-0031
TEL. +81-78-621-7000 FAX. +81-78-621-7788

Manufacturer

Yamamoto Electric Works Co., Ltd.

1-2-3 Nishishiriike-cho, Nagata-ku, Kobe City, Hyogo 653-0031
TEL. +81-78-631-6000 FAX. +81-78-631-6020

SEPTEMBER 2021 YAMAMOTO ELECTRIC WORKS CO., LTD., JAPAN