MK-MK2 Rotary clamp cylinder.. - SMC Pneumatics (Ireland)

Series MK/MK2/MK2TAuto SwitchesPrecautions 2Be sure to read this before handling.Mounting and AdjustmentWarning1. Operating manualInstall the products and operate them only after reading theoperating manual carefully and understanding its contents. Also,keep the manual where it can be referred to as necessary.2. Do not drop or bump.Do not drop, bump or apply excessive impacts (300 m⁄s 2 or morefor reed switches and 1000 m⁄s 2 or more for solid state switches)while handling. Although the body of the auto switch maynot be damaged, the inside of the auto switch could be damagedand cause a malfunction.3. Mount auto switches using the proper fastening torque.When a switch is tightened beyond the range of fastening torque,the mounting screws, auto switches, auto switch mountingbracket, etc. may be damaged. On the other hand, tighteningbelow the range of fastening torque may allow the switch to slipout of position. (Refer to the auto switch mounting for each seriesregarding auto switch mounting, moving, and fastening torque,etc.)4. Mount an auto switch at the center of the operatingrange.Adjust the mounting position of an auto switch so that the pistonstops at the center of the operating range (the range inwhich a switch is ON). (The mounting position shown in a catalogindicates the optimum position at stroke end.) If mounted atthe end of the operating range (around the borderline of ONand OFF), operation will be unstable or the service life will beshortened.When the auto switch is used to replace old series autoswitch, it may not activate depending on operating conditionbecause of its shorter operating range.Such as• Application where the stop position of actuator mayvary and exceed the operating range of the auto switch,for example, pushing, pressing, clamping operation, etc.• Application where the auto switch is used for detectingan intermediate stop position of the actuator. (In thiscase the detecting time will be reduced. )In these applications, set the auto switch to the center of therequired detecting range.Caution1. Do not carry an actuator by the auto switch lead wires.Never carry a cylinder (actuator) by its lead wires. This may notonly cause broken lead wires, but it may cause internal elementsof the auto switch to be damaged by the stress.2. Fix the auto switch with appropriate screw installedon the auto switch body. If using other screws, autoswitch may be damaged.WiringWarning1. Confirm proper insulation of wiring.Be certain that there is no faulty wiring insulation (contact withother circuits, ground fault, improper insulation between terminals,etc.). Damage may occur due to excess current flow into aswitch.2. Do not wire with power lines or high-voltage lines.Wire separately from power lines or high-voltage lines, avoidingparallel wiring or wiring in the same conduit with these lines.Control circuits, including auto switches, may malfunction dueto noise from these other lines.Caution1. Avoid repeatedly bending or stretching lead wires.Repeated bending or tensile force applied to the lead wire maycause the sheath to fall off or disconnection of the wire.If bending or tensile force are not avoidable, fix the lead wireclose to the switch and allow a bend radius of R40 to 80 mm orlarger. Consult SMC for details. Stress and tensile force appliedto the connection between the cable and switch increases thepossibility of disconnection.Fix the cable in the middle so that it is not movable in the areawhere it connects with the switch.2. Be sure to connect the load before power is applied.If the power is turned ON when an auto switch is not connectedto a load, the switch will be instantly damaged because of excesscurrent.It is the same as when the 2-wire brown cord (+, output) is directlyconnected to the (+) power supply terminal.3. Do not allow short circuit of loads.If the power is turned ON with a load in a short circuited condition,the switch will be instantly damaged because of excesscurrent flow into the switch.Model D-M9(V) and all models of PNP output type switchesdo not have built-in short circuit prevention circuits. If loads areshort circuited, the switches will be instantly damaged, as in thecase of reed switches.Take special care to avoid reverse wiring with the power supplyline (brown) and the output line (black) on 3-wire type switches.Back page 3