-6-
No.D-
※
S-OMJ0004-E
12. Pay attention to leakage current.
<2-wire type>
Current (leakage current) flows to the load to operate the internal circuit when in the OFF state.
Operating current of load (OFF condition) > Leakage current
If the criteria given in the above formula are not met, it will not reset correctly (stays ON).
Use a 3-wire auto switch if this specification will not be satisfied.
Moreover, leakage current flow to the load will be “n” times larger when “n” auto switches are connected in parallel.
13. Output operation of the solid state auto switch is not stable for 50 [ms] after powered ON.
In the output operation immediately after powered ON or AND connection operation, the input device (PLC or relay,
etc.) may judge the ON position as OFF output or the OFF position as ON output.
So, please make the setting on the equipment so that the input judgement signal is set disabled for 50 [ms] immediately
after powered ON or AND connection.
When using
SMC’s AHC system (Auto Hand Changing System) Series MA, please also make this setting.
Mounting/Adjustment
1. Do not drop or bump.
Do not drop, bump, or apply an excessive impact (300 m/s
2
or more for reed auto switches, 1000 m/s
2
or more for solid
state auto switches) while handing the auto switch. It may cause the auto switch to break or malfunction.
2. Observe the proper tightening torque for mounting an auto switch.
When an auto switch is tightened beyond the range of tightening torque, auto switch mounting screws, auto switch
mounting brackets or auto switch may be damaged.
On the other hand, tightening below the range of tightening torque may allow the auto switch to slip out of position.
3. Do not carry a cylinder by the auto switch lead wires.
This may cause disconnection of the lead wire or the internal element to break.
4. Do not use screws other than the set screws installed on the auto switch body to secure the auto switch.
If using other screws, auto switch may be damaged.
5. Mount an auto switch at the center of the operating range.
In the case of 2-color display auto switch, mount it at the center of the green LED illuminating range.
Adjust the mounting position of the auto switch so that the piston stops at the center of the operating range.
(The mounting position shown in the catalog indicates the optimum position at stroke end.)
If mounted at the end of the operating range (around the borderline of ON and OFF), operation will be unstable
depending on the operating environment. Also there are some cylinders or actuators with individual setting methods for
auto switches. If so, mount it in accordance with the indicated method.
Even if 2-color indication solid state auto switches are fixed at a proper operating range (the green light lights up),
the operation may become unstable depending on the installation environment or magnetic field disturbance.
(Magnetic body, external magnetic field, proximal installation of cylinders with built-in magnet and actuators,
temperature change, other factors for magnetic force fluctuation during operation, etc.)
6. Check the actual actuation status and adjust the auto switch mounting position.
According to the installation environment, the cylinder or actuator may not operate even at its proper mounting position.
Even when setting at a midpoint of the stroke, check the actuation status and make the adjustment in the same
manner.
