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The intended use of the pressure switch is to measure and display the pressure of fluid and to provide an output signal.
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 10218-1: Manipulating industrial robots -Safety. etc.
Caution indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury. | |
Warning indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury. | |
Danger indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury. |
Special products (-X) might have specifications different from those shown in this section. Contact SMC for specific drawings.
Part | Description |
Operation Light | Displays the switch operating condition |
Main display | Displays pressure measurement values and error codes (2 colour display). |
Sub display (left) | Displays items (Orange) |
Sub display (right) | Displays set values, peak and bottom values. (Orange) |
UP button | Increases mode and ON/OFF set values. |
DOWN button | Decreases mode and ON/OFF set values. |
SET button | Changes the mode and confirms the settings. |
IO-Link status indicator light | Displays OUT1 output communication status (SIO mode, start-up mode, operation mode) and the presence of communication data. |
Mount the bracket to the product using mounting screws supplied (M4x6 L (2 pcs)) then set the product in the required position.
Tighten the bracket mounting screws to a torque of 0.76 ±0.1 N•m.
How to use connector
Align the cable connector key groove with the product connector key to insert and rotate the knurled part of the connector.
Connect the wires of the lead wire to the M12 connector as shown below.
M12 Connector (Port class A)
No. | Name | Colour | Function |
1 | DC(+) | Brown | 12 to 24 VDC |
2 | OUT2 | White | Switch output 2 |
3 | DC(-) | Blue | 0 V |
4 | OUT1 | Black | Switch output 1 |
No. | Name | Colour | Function |
1 | L+ | Brown | 18 to 30 VDC |
2 | DO | White | Switch output 2 |
3 | L- | Blue | 0 V |
4 | C/Q | Black | Communication data (IO-Link) / Switch output 1 (SIO) |
Default settings
When the pressure exceeds the set value, the switch will be turned ON.
When the pressure falls below the set value by the amount of hysteresis or more, the switch will be turned OFF.
The default setting is to turn ON the pressure switch when the pressure reaches the centre of the atmospheric pressure and upper limit of the rated pressure range. If this condition is acceptable, then keep these settings.
Default setting for Pressure range
Item | ISE70 | ISE71 |
[P_1] Set value of OUT1 [MPa] | 0.500 | 0.800 |
[H_1] Hysteresis of OUT1 [MPa] | 0.050 | 0.080 |
3 step setting mode (hysteresis mode)
In 3 step setting mode, the set value (P_1 or n_1) and hysteresis (H_1) can be changed. Set the items on the sub display (set value or hysteresis) using the UP and DOWN button. When changing the set value, follow the operation below. The hysteresis setting can be changed in the same way.
The Pressure switch turns on within a set pressure range (from P1L to P1H) during window comparator mode. Set P1L, the lower limit of the switch operation, and P1H, the upper limit of the switch operation and WH1 (hysteresis) following the instructions given above.
(When reversed output is selected, the sub display (left) will indicate [n1L] and [n1H].)
In measurement mode, press the SET button between 3 and 5 seconds to display [F 0]. Select to display the function to be changed [F□□]. Press and hold the SET button for 2 seconds or longer in function selection mode to return to measurement mode.
∗: Some products do not have all of the functions. If a function is not available or selected due to configuration of other functions, [- - -] is displayed on the sub display.
Refer to the operation manual on the SMC website (URL: https://www.smcworld.com) for further details of how to set these and other functions.
How to reset the product after power cut or forcible de-energizing
The setting of the product will be retained as it was before a power cut or de-energizing. The output condition is also basically recovered to that before a power cut or de-energizing, but may change depending on the operating environment.
Therefore, check the safety of the whole installation before operating the product. If the installation is using accurate control, wait until the product has warmed up (approximately 10 to 15 minutes).
Error | Error displayed | Description | Measures |
Over current error | The load current applied to the switch output has exceeded the maximum value. | Turn the power off and remove the cause of the over current. Then supply the power again. | |
Residual pressure error | During zero clear operation, pressure greater than ±7% F.S. is present. Note that the mode is returned to measurement mode automatically 1 s later. The zero clear range varies by ±1% F.S. due to variation between individual products. | Release the applied pressure to atmosphere, and retry the zero clear operation. | |
Pressurize error | Pressure exceeding the upper limit of the set pressure range is applied. | Reset applied pressure to a level within the set pressure range. | |
Pressure exceeding the lower limit of the set pressure range is applied. | |||
System error | Displayed if an internal data error has occurred. | Turn the power off and on again. If the failure cannot be solved, contact SMC. | |
Version does not match | Version of master and IO-Link does not match. | Align the master IO-Link version to the device. |
If the error cannot be reset after the above measures are taken, or errors other than the above are displayed, please contact SMC.
Refer to Handling Precautions for SMC Products.
This product shall not be disposed of as municipal waste. Check your local regulations and guidelines to dispose this product correctly, in order to reduce the impact on human health and the environment.
Refer to www.smcworld.com or www.smc.eu for your local distributor / importer.
SMC Corporation
URL: https://www.smcworld.com (Global) https://www.smc.eu (Europe)
SMC Corporation, 4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021, Japan
Specifications are subject to change without prior notice from the manufacturer.
© 2021 SMC Corporation All Rights Reserved.
Template DKP50047-F-085M
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
Download SMC ISE70, ISE71 - High Precision Digital Pressure Switch Manual
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