Doc. No.

DIQ-69200-OM002-A

P R O D U C T N A M E

High Pressure E/P Regulator

MODEL/ Series/ Product Number

ITVH Series

● Install and operate the product only after reading the Operation Manual carefully and
understanding its contents.

● Specifically, read the safety instructions carefully.

● Keep this operation manual available whenever necessary.

Contents

Contents P1
Safety Instructions P2
Handling precautions P4
Wiring method P6
Setting method P8
Key locking function P9
Setting of min. pressure, max. pressure and switch output P10
Mode of switch output P11
Setting of preset pressure P12
Reset function P12
Error indicating function P13
Detail setting mode P13
Gain setting P14
Zero clear P14
Initialize P15
LED display P15

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 High Pressure E/P Regulator
Safety Instructions
These safety instructions are intended to prevent hazardous situations and/or equipment damage.
These instructions indicate the level of potential hazard with the labels of “Caution,” “Warning” or “Danger.”
They are all important notes for safety and must be followed in addition to International Standards (ISO/IEC)*1) ,
and other safety regulations.
*1) ISO 4414: Pneumatic fluid power -- General rules relating to systems.
ISO 4413: Hydraulic fluid power -- General rules relating to systems.
IEC 60204-1: Safety of machinery -- Electrical equipment of machines .(Part 1: General requirements)
ISO 10218-1992: Manipulating industrial robots -Safety.
etc.

Caution indicates a hazard with a low level of risk which, if not avoided, could result
Caution in minor or moderate injury.
Warning indicates a hazard with a medium level of risk which, if not avoided, could
Warning result in death or serious injury.
Danger indicates a hazard with a high level of risk which, if not avoided, will result
Danger in death or serious injury.

Warning
1. The compatibility of the product is the responsibility of the person who designs the equipment or
decides its specifications.
Since the product specified here is used under various operating conditions, its compatibility with specific
equipment must be decided by the person who designs the equipment or decides its specifications based on
necessary analysis and test results.
The expected performance and safety assurance of the equipment will be the responsibility of the person who
has determined its compatibility with the product.
This person should also continuously review all specifications of the product referring to its latest catalog
information, with a view to giving due consideration to any possibility of equipment failure when configuring the
equipment.
2. Only personnel with appropriate training should operate machinery and equipment.
The product specified here may become unsafe if handled incorrectly.
The assembly, operation and maintenance of machines or equipment including our products must be performed
by an operator who is appropriately trained and experienced.
3. Do not service or attempt to remove product and machinery/equipment until safety is confirmed.
1.The inspection and maintenance of machinery/equipment should only be performed after measures to
prevent falling or runaway of the driven objects have been confirmed.
2.When the product is to be removed, confirm that the safety measures as mentioned above are implemented
and the power from any appropriate source is cut, and read and understand the specific product precautions
of all relevant products carefully.
3. Before machinery/equipment is restarted, take measures to prevent unexpected operation and malfunction.
4. Contact SMC beforehand and take special consideration of safety measures if the product is to be
used in any of the following conditions.
1. Conditions and environments outside of the given specifications, or use outdoors or in a place exposed to
direct sunlight.
2. Installation on equipment in conjunction with atomic energy, railways, air navigation, space, shipping,
vehicles, military, medical treatment, combustion and recreation, or equipment in contact with food and
beverages, emergency stop circuits, clutch and brake circuits in press applications, safety equipment or
other applications unsuitable for the standard specifications described in the product catalog.
3. An application which could have negative effects on people, property, or animals requiring special safety
analysis.
4. Use in an interlock circuit, which requires the provision of double interlock for possible failure by using a
mechanical protective function, and periodical checks to confirm proper operation.

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 High Pressure E/P Regulator
Safety Instructions
Caution
1. The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in manufacturing industries.
If considering using the product in other industries, consult SMC beforehand and exchange specifications
or a contract if necessary.
If anything is unclear, contact your nearest sales branch.

Limited warranty and Disclaimer/Compliance Requirements

The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance
Requirements”.
Read and accept them before using the product.

Limited warranty and Disclaimer

1.The warranty period of the product is 1 year in service or 1.5 years after the product is delivered,
∗2)
whichever is first.∗
Also, the product may have specified durability, running distance or replacement parts. Please
consult your nearest sales branch.

2. For any failure or damage reported within the warranty period which is clearly our responsibility,
a replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other damage
incurred due to the failure of the product.

3. Prior to using SMC products, please read and understand the warranty terms and disclaimers
noted in the specified catalog for the particular products.

∗2) Vacuum pads are excluded from this 1 year warranty.

A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.
Also, even within the warranty period, the wear of a product due to the use of the vacuum
pad or failure due to the deterioration of rubber material are not covered by the limited
warranty.

Compliance Requirements
1. The use of SMC products with production equipment for the manufacture of weapons of mass
destruction (WMD) or any other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are governed by the
relevant security laws and regulation of the countries involved in the transaction. Prior to the
shipment of a SMC product to another country, assure that all local rules governing that export
are known and followed.

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Handling precautions

△
！ Caution

If power to this product is cut off due to a power

failure, etc. when it is in a controlled state, residual
pressure will be retained temporarily. Handle
carefully when operating with output pressure
released to the atmosphere, as air will continue to
flow out.

If supply pressure to this product is interrupted or

shut off, while the power is still on, the internal
solenoid valve will continue to operate and a
humming noise will be generated.
Turn off the power supply when supply pressure is
interrupted or shut off, since the life of the product
may be shortened.

The optional cable connector is a 4 wire type.

When the monitor output (analogue output or switch
output) is not being used, prevent the unused wires
from touching the other wires, as a malfunction
could occur.

This product is adjusted to specification at the time

of shipment from the factory.
Avoid careless disassembly or removal of parts, as
this can lead to malfunction.

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△
！ Caution

Take the following steps to avoid malfunction due

to noise.

1. Install a line filter etc. to the AC power line to

reduce / eliminate power supply noise.
2. Avoid malfunction due to noise by installing this
product and its wiring away from strong electric
fields, such as those of motors and power
cables, etc.
3. Be sure to implement protective measures
against load surge for inductive loads (solenoid
valves, relays etc.).
4. Turn off the power supply before inserting or
removing the connector.
5. Ground the F.G. terminal at the front of the main
body.

Please note that the right angled cable connector

does not rotate and is limited to only one entry
direction.

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 Wiring method
Wiring diagram (Power supply and input signal)

△
！ Caution
① Proceed carefully, as incorrect wiring can cause damage.
② Use a DC power supply with sufficient capacity and a low ripple.
③ Turn off the power supply to remove and insert the connector.
④ Never rotate the right angled type connector as it is not designed to rotate.

1 Brown Power supply

2 White Input signal
3 Blue GND (Common)
4 Black Monitor output

(Note) The wire colour is shown

for when an alternative cable is used.

Current / Voltage type (ITVH2020-0、ITVH2020-1、ITVH2020-2、ITVH2020-3)

１：Brown
Power supply 24 VDC
○
Input signal 4～20mADC (ITVH2020-0) +
３：Blue
Power supply
0～20mADC (ITVH2020-1)
○
- ２：White
0～ 5VDC (ITVH2020-2)
○
+
0～10VDC (ITVH2020-3) ４：Black
Input signal
○
-

Preset input type (ITVH2020-40)

１：Brown
Power supply 24 VDC (Negative)
○
+
３：Blue
Power supply
Fig.1 Relation between preset pressure and switch ○
- S1 ２：White
Preset pressure P_1 P_2 P_3 P_4
S1 OFF ON OFF ON S2 ４：Black
S2 OFF OFF ON ON

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 （Monitor output）
Wiring diagram（ ）

△！ Caution
When the monitor output is not being used, prevent the unused wires from touching the other
wires, as this can cause a malfunction.

Analogue output - Voltage type Analogue output - Current (sink) type

(ITVH2020-※1) (ITVH2020-※4)

1：Brown 1：Brown

3：Blue ○
+ 3：Blue
○
-
2：White Monitor output current 2：White
Monitor output voltage
4：Black ○
- 4：Black
○
+

Only use equipment with a minimum load Only use equipment with a maximum load
impedance of 100 kΩ. impedance of 250 Ω.

Switch output - NPN type Switch output - PNP type

(ITVH2020-※2) (ITVH2020-※3)

1：Brown 1：Brown

3：Blue 3：Blue

Load 2：White Load 2：White

4：Black 4：Black

When a current of approx.150 mA or more is When a current of approx.150 mA or more is

applied, the over current circuit will operate, applied, the over current circuit will operate,
“Er.5” will be displayed and the operation will “Er.5” will be displayed and the operation will
stop. stop.
Please install a load to give an output current Please install a load to give an output current
of 80 mA or less. of 80 mA or less.

Wiring diagram (Ground the F.G. terminal)

△！ Caution

Ground the F.G. terminal at the front of the main body

If the ground terminal (F.G.) is not used, this product may not operate correctly due to noise.
If the field ground fluctuates due to noise, it may affect the operation of the product.

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 Setting method

△ ！ Caution

① If an incorrect key is pressed or incorrect information is displayed during setting, power

must be turned off and the procedure started again.
② It is recommended that the settings are changed without supply pressure. The product
operates immediately maximum and minimum pressures are set and the S-key is pressed.
③ It is recommended that the minimum pressure is output when air is supplied to the inlet,
even if the input signal has not been entered.
④ Output pressure from this product and state of operation are changed by changing of each
setting and function. Each setting and function should be operated by trained and
experienced operator.

Flow of the setting

Power ON

Refer to P9

Unlock keys

Refer to P10-12 Refer to P13-15 Refer to P12 Refer to P9

Setting of Preset pressure Detail Setting Mode Reset Lock keys

Setting of min. pressure

Gain
Setting of max. pressure
Setting of switch output

Zero clear

Initialize

(Note1) Please refer to each section for the operation method.

(Note2) The function of the setting of preset pressure is preset input type only.
(Note3) The function of the setting of switch output refers to the switch output type only.

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 Key locking function

△！ Caution

The keys are locked after turning the power on and can not be operated.

Unlocking the keys

No Key operation LED Display
① (current) pressure is displayed
② Press ▽ key for 2 seconds or more. is displayed
③ flashes on the display
④ Press S-key
⑤ is displayed for approx. 1 second
⑥ Key lock is released (current) pressure is displayed
(Note) ④ Press △ key to cancel.

Locking the keys

No Key operation LED Display
① (current) pressure is displayed
② Press △ key for 2 seconds or more. is displayed
③ flashes on the display
④ Press S-key
⑤ is displayed for approx. 1 second
⑥ Keys are locked (current) pressure is displayed
(Note) ④ Press ▽ key to cancel.

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Setting of min. pressure, max. pressure and switch output

No Key operation LED Display

① Unlock keys (refer to P9)
② Press S-key
Set the minimum pressure by using the ⇔ (displayed alternately)
③
△ and ▽ keys. * Adjusting range: Refer to Note 1 to 6
④ Press S-key
Set the maximum pressure by using the ⇔ (displayed alternately)
⑤
△ and ▽ keys. * Adjusting range: Refer to Note 1 to 6
⑥ Go to No. ⑪ for monitor output : analogue output (voltage and current) type.
⑦ Press S-key
⑧ Set the P_1 by using the △ and ▽ keys. ⇔ (displayed alternately)
⑨ Press S-key
⑩ Set the P_2 by using the △ and ▽ keys. ⇔ (displayed alternately)
⑪ Press S-key Return to (current) pressure display.
⑫ Lock keys (refer to P9)

Minimum pressure (F_1) adjusting range Maximum pressure (F_2) adjusting range

120%
100% 100%
90%
10%
0% 0%
4 12 20mA 4 12 20mA
0 10 20mA 0 10 20mA
0 2.5 5V 0 2.5 5V
0 5 10V 0 5 10V
(Note1) F_1 is adjustable in a range from 0% to 90% of the rated value.
(Default value : 0%＝0.00MPa)
(Note2) F_2 is adjustable in a range from 10 to 120% of the rated value.
(Default value : 100%＝2.00MPa)
(Note3) Do not input the signal as like output the pressure of more than 100%.
Please use in a range of rating.
(Note4) The difference between F_1 and F_2 is adjustable in a range of 10% of the rated value.
(Note5) The adjustment like making the relation of F_1 > F_2 is not available.
(Note6) The numbers (2.00 etc) on the LED display indicate the secondary pressure.

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 Mode of switch output
The following operation types are available by setting P_1 and P_2.
(Note) This function is available for monitor output: switch output type. (ITVH2020-※2, -※3)

■ P_1＜P_2： ■ P_1≧P_2：
Window comparator mode Hysteresis mode

Output pressure of
E/P regulator

P_2 P_1

P_1 P_2

ON ON
OFF OFF

Switch output

■ P_1＝P_2＝0： Out of range mode

(The switch output turns on when set pressure is achieved.)

Input signal

Output pressure of
E/P regulator

Switch output
ON
OFF

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 Setting of preset pressure [Preset input type only]
No Key operation LED Display
① Unlock keys (refer to P9)
② Press S-key
③ Set P_1 by using the △ and ▽ keys. ⇔ (displayed alternately)
④ Press S-key
⑤ Set P_2 by using the △ and ▽ keys. ⇔ (displayed alternately)
⑥ Press S-key
⑦ Set P_3 by using the △ and ▽ keys. ⇔ (displayed alternately)
⑧ Press S-key
⑨ Set P_4 by using the △ and ▽ keys. ⇔ (displayed alternately)
⑩ Press S-key Return to (current) pressure display.
⑪ Lock keys (refer to P9)
(Note1): P_1 to P_4 are adjustable in a range from 0% to 100% of the rated value.
(Default value: 0%)
(Note2): For safety reasons, it is recommended that one of the preset pressures be set to 0 MPa.
(Note3): Preset pressures are set based on the minimum unit for output display.

unit MPa kgf/cm2 bar psi

The range of the
0.00 to 2.40 0.0 to 24.0 0.0 to 24.0 0 to 348
LED pressure display

Reset function
Reset method
No Key operation LED Display
① Unlock keys (refer to P9)
Press the △ and ▽ keys simultaneously for
② (Current) pressure is displayed
3 seconds or more.
③ is displayed for approx. 1 second
The settings are reset and returned to the condition before power was applied.
④
(Key locked)

Reset content
Item Reset content Application model
F_1 0%F.S. Current / Voltage input type
F_2 100%F.S. Current / Voltage input type
P_1、P_2 100%F.S. Switch output type
P_1～P_4 0%F.S. Preset input type
(Note) Gain (GL) is not reset.

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Error indicating function
LED
Error name Contents of error Countermeasure
display
Reduce input signal to within the
Over range of Input signal exceeds the
rated range and restart the power
input signal rated value range.
supply.
Please execute "Initialize (refer to
P15)" when the ITVH does not
operate normally after reconnecting
Reading or writing errors
the power supply.
occurred in EEPROM.
Please contact SMC, when the ITVH
System error
does not operate normally after
initialization.
Please contact SMC when the ITVH
Reading and writing errors
does not operate normally after
occurred in memory.
reconnecting the power supply.
Replace the solenoid valve.
Solenoid
Solenoid valve failure For the replacement procedure
valve error
contact SMC.
Over current Over current errors in Please install a load to give an output
error switch output current of 80 mA or less.
Please operate "Zero clear" within
the range of +/- 5% F.S.
Residual Out of range error of
Please operate "Zero clear" after the
pressure error "Zero clear"
secondary pressure of the ITVH has
reached atmospheric.

Detail setting mode

No Key operation and LED display
① Unlock keys (refer to P9)
② Press S-key for 2 seconds or more.

⇔ (displayed alternately) Press S-key

△ key ↑ To "Gain" (P14)
↓ ▽ key

③ △ key ⇔ (displayed alternately) Press S-key

△ key ↑ ▽ key To "Zero clear" (P14)

↓ ▽ key
⇔ (displayed alternately) Press S-key
To "Initialize" (P15)
④ In state of ③, press S-key for 2 seconds or more.
⑤ Return to (current) pressure display.
⑥ Lock keys (refer to P9)

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 Gain setting
Normal operation does not require the adjustment of gain.
The product can change the response time using this gain setting.
When the gain is changed to a larger value, the response will be faster, but there is a possibility
that stability will be lost.

No Key operation LED Display

① Unlock keys (refer to P9)
② Press S-key for 2 seconds or more, then go to detail setting mode.
③ To "F01" by using the △ and ▽ keys. ⇔ (displayed alternately)
④ Press S-key.

⑤ Set the GAIN by using the △ and▽ keys.

(blink and change the most right digit)
⑥ Press S-key. ⇔ (displayed alternately)
Press S-key for 2 seconds or more, then go out from detail setting mode.
⑦
(Select the menu with △ or ▽ keys, then jump to another item.)
⑧ Lock keys (refer to P9)

Relation between setting of gain and response time

Response Slow Quick
Setting of
～
GAIN
(Note) Default :

Zero clear
The display can be reset to zero by executing "Zero clear".
When "Zero clear" is executed with residual pressure in the secondary piping, the pressure is
assumed to be zero. Please execute the operation of "Zero clear" with the supply pressure
interrupted, and the piping of the secondary side removed.

No Key operation LED Display

① Unlock keys (refer to P9)
② Press S-key for 2 seconds or more, then go to detail setting mode.
③ To "F03" by using the △ and ▽ keys. ⇔ (displayed alternately)
④ Press S-key. displayed alternately
Press △ and ▽ keys for 3 seconds or more.
⑤ is displayed
(press S-key to ③)
"Zero clear" is executed, after 3 seconds.
⑥ is displayed for approx. 1 second.
(Release keys till less than 3 seconds to ④)
Returns to the state immediately after turning on the power supply.
⑦
(keys are locked)
(Note) The adjustable range is within +/- 5% F.S from the state of the factory shipment. When
outside of this range, is displayed and "Zero clear" will not be executed.

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 Initialize
"Initialize" is a function to return all the settings that the internal control constant are included to
an initial value. Please execute "initialize" only when the error is displayed and this product does
not operate at all.
Please execute the "Reset" function, when you want to return the pressure setting and the switch
setting to an initial value.

No Key operation LED Display

① Unlock keys (refer to P9)
② Press S-key for 2 seconds or more, then go to detail setting mode.
③ To "F99" by using the △ and ▽ keys. ⇔ (displayed alternately)
④ Press S-key. displayed alternately
Press △ and ▽ keys for 3 seconds or more.
⑤ is displayed
(press S-key to ③)
"Initialize" is executed, after 5 seconds.
⑥ Turning off for 1 second
(Release keys till less than 5 seconds to ④)
Returns to the state immediately after turning on the power supply.
⑦
(keys are locked)

LED display
The range of the LED pressure display is different according to the unit of the display.

unit MPa kgf/cm2 bar psi

The range of the
0.00 to 2.40 0.0 to 24.0 0.0 to 24.0 0 to 348
LED pressure display
(Note1) When the display exceeds the upper bound value, " " is displayed.
(Note2) Set the minimum, maximum and switch pressures within the allowable range shown
above.
(Note3) The unit cannot be changed.

Revision history
A：Correction of P/N (P11,P13)
Refer to the SMC website
(URL http://www.smcworld.com) for more information
about troubleshooting.
This operation manual refers to all standard types
and is partially applicable to special models.

4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021 JAPAN

0120-837-838
Tel: + 81 3 5207 8249 Fax: +81 3 5298 5362
URL http://www.smcworld.com

Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.
© 2014 SMC Corporation All Rights Reserved

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