通常分为常开型，常闭型和自保持式三种。
Usually divided into normally open, normally closed and self-holding three.
阀门有常开和常闭两种，可用于燃油，液压或气动应用领域。
Valve types include Normally Open and Normally Closed valves, for use in fuel, hydraulic, or pneumatic applications.
可选包括直接作用和隔膜式常开或常闭版本。
Options include direct acting and diaphragm type operations in a Normally Open or Normally Closed version.
这两种集成PNP开关输出可自由编程，允许用户调节限定值，滞后和功能型(常闭或常开)的需要。
Both integrated PNP switch outputs are freely programmable, allowing the user to adjust the limit value, hysteresis, and functionality type (normally closed or normally open) as needed.
这两种集成PNP开关输出可自由编程，允许用户调节限定值，滞后和功能型(常闭或常开)的需要。
Both integrated PNP switch outputs are freely programmable, allowing the user to adjust the limit value, hysteresis, and functionality type (normally closed or normally open) as needed.
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