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Maintenance Warning 1. Removal of equipment, and supply/exhaust of compressed air Before any machinery or equipment is removed, first ensure that the appropriate measures are in place to prevent the fall or erratic movement of driven objects and equipment, then cut off the electric power and reduce the pressure in the system to zero. Only then should you proceed with the removal of any machinery and equipment. When machinery is restarted, proceed with caution after confirming that appropriate measures are in place to prevent actuators from moving suddenly. 2. Do not touch a terminal during energizing. Touching a terminal during energizing may cause electric shock, malfunction, or auto switch breakage. Caution 1. Perform the following maintenance periodically in order to prevent possible danger due to unexpected auto switch malfunction. 1) Secure and tighten auto switch mounting screws. If screws become loose or the mounting position is dislocated, retighten them after readjusting the mounting position. 2) Confirm that there is no damage to lead wires. To prevent faulty insulation, replace auto switches or repair lead wires, etc., if damage is discovered. 3) Confirm the detection setting position. . Red light of 1-color display auto switch Confirm that the set position stops at the center of the operating range (red display area). . Confirm the green light and position of the 2-color display auto switch. Confirm that the set position stops at the center of the appropriate operating range (green display area). If stopped with the red LED lit, the operation may become unstable due to effects of the equipment environment or external disturbance. So, set the mounting position at the center of the appropriate operating range again. Some cylinders or actuators indicate the individual setting procedures for the auto switch. If so, set the mounting position using the individual setting procedures. 2. Do not use solvents such as benzene, thinner etc. to clean the product. They could damage the surface of the body and erase the markings on the body. For heavy stains, use a cloth lightly dampened with diluted neutral detergent, then wipe up any residue with a dry cloth. Operating Environment Warning 1. Never use in an atmosphere of explosive gases. The structure of auto switches is not intended to prevent explosion. This may lead to explosion hazard. Please contact SMC concerning ATEX compliant products. Caution 1. Do not use in an area where a magnetic field is generated. Auto switches will malfunction or magnets inside cylinders/ actuators will become demagnetized. (Please consult with SMC if a magnetic field resistant auto switch can be used.) 2. Do not use in an environment where the auto switch will be continually exposed to water. Although auto switches satisfy IEC standard IP67 construction except some models (D-A3ュ, A44ュ, G39ュ, K39ュ, RNK, RPK) do not use auto switches in applications where continually exposed to water splash or spray. This may cause improper insulation or malfunction. 3. Do not use in an environment with oil or chemicals. If auto switches are used in an environment containing coolant, cleaning solvent, various oils, or chemicals even for a short period of time, this may adversely affect the auto switches, resulting in improper insulation, malfunction due to swelling of the potting resin, or hardening of the lead wires. 4. Do not use in an environment with temperature cycles. If temperature cycles other than normal temperature changes are applied, this may adversely affect the insides of the auto switches. 5. Avoid accumulation of iron waste or close contact with magnetic substances. If many iron particles, such as cutting chips or spatters accumulate around a cylinder with the auto switches or an actuator or if a magnetic substance (attracted by a magnet) is put close to a cylinder with the auto switch or an actuator, the magnetic force inside the cylinder or actuator loses, causing the auto switch to malfunction. 6. Please contact SMC concerning water resistance, elasticity of lead wires, usage at welding sites, etc. 7. Do not use in direct sunlight. 8. Do not mount the product in locations where it is exposed to radiant heat. 9. Take appropriate measures against the lightning surge on the equipment side as the auto switches do not have any lightning surge resistance specified in the CE marking. Auto Switches Precautions 3 Be sure to read this before handling. 15