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Cylinders or actuators include cylinders, air grippers, rotary actuators, and electrical actuators/cylinders. Design/Selection Warning 1. Confirm the specifications. If the product is used with excess load applied or beyond the specification range, this may cause the product to break or malfunction. We do not guarantee against any damage if the product is used outside of the specification range. 2. Cautions for use in an interlock circuit When an auto switch is used for an interlock signal requiring high reliability, devise a double interlock system to avoid trouble by providing a mechanical protection function, or by also using another switch (sensor) together with the auto switch. Also, perform periodic maintenance and confirm proper operation. 3. Do not attempt to disassemble, modify (including exchanging the printed circuit boards), or repair the product. An injury or failure can result. Caution 4. Do not mount the cylinder or actuator with the auto switch on a footing. If work personnel gets on or puts the work personnel’s foot on the footing accidentally, an excessive load is applied to the cylinder or actuator, causing the cylinder or actuator to break. 5. Design the circuit so that any back-flow current does not flow in if a short-circuit trouble occurs or forced operation is performed to check the operation. If a back-flow current occurs, this may cause the switch to malfunction or break. 6. When multiple auto switches are required. “n” indicates the number of auto switches which can be physically mounted on the cylinders/actuators. Detection intervals depends on the auto switch mounting structure and set position, therefore some required interval and set positions may not be available. 7. Limitations on detectable position There are positions or surfaces (bottom surface of the foot bracket, etc.) where the auto switch cannot be mounted due to the physical interference depending on the cylinder or actuator mounting status or mounting bracket. Select an appropriate auto switch setting position where the auto switch does not interfere with the cylinder or actuator mounting bracket (trunnion or reinforcing ring) after checking it sufficiently. Auto Switches Precautions 1 Be sure to read this before handling. Caution 1. Pay attention to the length of time that a switch is ON at an intermediate stroke position. When an auto switch is placed at an intermediate position of the stroke and a load is driven at the time the piston passes, the auto switch will operate, but the operating time will be short if the speed is too fast. As a result, the load may not operate completely. The maximum detectable piston speed is: In cases of high piston speed, the use of an auto switch (D-F5NT, F7NT, G5NT, M5NT, M5PT) with a built-in OFF delay timer (. 200 ms) makes it possible to extend the load operating time. The wide-range detection type D-G5NB (operating range 35 to 50 mm) may also be useful, depending on the application. Please consult with SMC for other models. 2. Take precautions when multiple cylinders/ actuators are used close together. When multiple auto switch cylinders/actuators are used in close proximity, magnetic field interference may cause the auto switches to malfunction. Maintain a minimum cylinder separation of 40 mm. (When the allowable interval is specified for each cylinder series, use the indicated value.) The auto switches may malfunction due to the interference from the magnetic fields. Use of a magnetic screen plate (MU-S025) or commercially available magnetic screen tape can reduce the interference of magnetic force. 3. Ensure sufficient clearance for maintenance activities. When designing an application, be certain to allow sufficient clearance for maintenance. Auto switch operating range (mm) Time load applied (ms) V (mm/s) = x 1000 13