I/O modules for electro-pneumatic systems include discrete DC input and output modules with up to 16 points, configurable for PNP or NPN wiring. Analog input modules support various current and voltage ranges; a temperature input module supports RTD or thermocouple signals.
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Pneumatic valves, also called directional control valves, are activated in a variety of ways including manually, solenoid operated, and air piloted. Directional control solenoid valves use an electrical coil to control the position of a poppet, plunger, or spool to open or close a valve. Typical solenoid control voltages are 12VDC, 24 VAC/DC, 120VAC or 240VAC. Solenoid valves distribute air to cylinders, grippers, nozzles, and many other pneumatic devices, and are available in a range of body styles and operating characteristics. Modular solenoid valve banks and electro-pneumatic systems reduce wiring and plumbing, and increase control simplicity.
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When an electrical current is routed through the coil of a solenoid valve, a magnetic field is generated which in turn causes an internal metal plunger, spool, etc. to move. This movement is used to either block or allow airflow through the valve and can work either directly or indirectly on the incoming air. Normally open (N.O.) solenoid valves will remain open when power is removed from the coil while normally closed (N.C.) solenoid valves remain closed.
Solenoid valves are available in standalone valves, units for modular and electro-pneumatic systems, and ISO 5599/1 sized models that are designed to work seamlessly with systems that comply with the ISO 5599/1 standard.
Manifolds simplify installation and reduce the amount of plumbing needed for multiple standalone valves or, in the case of modular valves, help create a valve bank assembly. Manifolds are supplied with gaskets and hardware; blanking plates are used to cover unused slots. Bases are required for ISO 5599/1 solenoid valves and can be stacked to create a modular manifold.
Solenoid valve control interfaces allow simplified wiring by providing a bus coupler for an electro-pneumatic system or a modular valve bank to be controlled via an EtherNet/IP master; electrical distribution blocks streamline individual solenoid valve wiring.
The NITRA Pneumatic Automation Link (PAL) system is a modular, electro-pneumatic set of components that can include electrical I/O or pneumatic valves or both. Several I/O modules are available offering discrete DC input and outputs, analog inputs with support for various current and voltage ranges, and temperature inputs.
Accessories are available to assist with the installation and configuration of the various series and styles of solenoid valves, including:
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