q w Rubber seal Washer Connector Binding head screw with flange Tightening torque 0.5 to 0.6 N・m Gasket Binding head screw Tightening torque 0.5 to 0.6 N・m Compatible cable Note) (Cable O.D. o6 to o12 mm) 2 3 + . 1 2: . (+) 1: + (.) �� DIN terminal Since internal connections are shown below for the DIN terminal, make connections to the power supply accordingly. Electrical Connections Caution �� Grommet Class B coil: AWG20 Insulator O.D. 2.5 mm Class H coil: AWG18 Insulator O.D. 2.1 mm . There is no polarity. . Use compatible heavy duty cords with cable O.D. o6 to o12 mm. . Use the tightening torques below for each section. Rated voltage DC 100 VAC 200 VAC Other AC q Black Blue Red Gray w Red Blue Red Gray Lead wire color Terminal no. DIN terminal 1 + (.) 2 . (+) Note) For an outside cable O.D. o9 to o12 mm, remove the internal parts of the rubber seal before using. . There is no polarity. Caution Operating Environment Warning 1. Do not use in an atmosphere having corrosive gases, chemicals, sea water, water, water steam, or where there is direct contact with any of these. 2. Do not use in explosive atmospheres. 3. Do not use in locations subject to vibration or impact. 4. Do not use in locations where radiated heat will be received from nearby heat sources. 5. Employ suitable protective measures in locations where there is contact with water droplets, oil or welding spatter, etc. Maintenance Warning 1. Filters and strainers 1) Be careful regarding clogging of filters and strainers. 2) Replace filter elements after one year of use, or earlier if the pressure drop reaches 0.1 MPa. 3) Clean strainers when the pressure drop reaches 0.1 MPa. 2. Lubrication When using after lubricating, never forget to lubricate continuously. 3. Storage In case of long term storage after use, thoroughly remove all moisture to prevent rust and deterioration of rubber materials etc. 4. Exhaust the drainage from an air filter periodically. 1. Removing the product The valve will reach a high temperature when used with high temperature fluids. Confirm that the valve temperature has dropped sufficiently before performing work. If touched inadvertently, there is a danger of being burned. 1) Shut off the fluid supply and release the fluid pressure in the system. 2) Shut off the power supply. 3) Dismount the product. 2. Low frequency operation Switch valves at least once every 30 days to prevent malfunction. Also, in order to use it under the optimum state, conduct a regular inspection once a half year. Operating Precautions Warning 1. If there is a possibility of reverse pressure being applied to the valve, take countermeasures such as mounting a check valve on the downstream side of the valve. 2. When problems are caused by a water hammer, install water hammer relief equipment (accumulator etc.), or use an SMC water hammer relief valve (Series VXR). For details, please consult with SMC. Series VX21/22/23 Specific Product Precautions 6 Be sure to read before handling. Refer to back cover for Safety Instructions. For 2 Port Solenoid Valves for Fluid Control Precautions, refer to “Handling Precautions for SMC Products” and the Operation Manual on SMC website, http://www.smcworld.com 48