Proximity switches
series KT-21 and KT-50 |
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KT-xxP series of electronic (PNP) proximity switches eliminates negative features of reed relays. Those switches are fully electronic, which brings excellent properties, long lifetime and integrated protections. We also offer reed switches, series KT-xxR. Series KT switches can be used with all types of Stránský a Petržík‘s cylinders. For various types of cylinders the right bracket must be used. Switches KT-50 can be used with cylinders with T-slot made by other producer. |
Order codes, use on cylinders | Technical data, dimensions, connection | Data sheet (PDF) | Technical information |
Rules for using | Brackets for series KT-21 | Brackets for series KT-50 | Cables and connectors |
Rules for using of proximity switches
WarningDo not exceed specification, permanent damage to the sensor may occur. |
1. | For reed switch type sensors, polarity must also be observed for the proper functioning of LED. Connect the brown wire in series with load positive (+) and the blue wire to negative (-) of power source. If the polarity is reversed, reed switch remains functional but LED will remain in “OFF” state. | |
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2. | For solid-state type sensors , polarity must also be observed . Connect brown (red for SP-472 switch) wire to the positive (+) and the blue to the negative (-) of DC power source. The black (white for SP-472 switch) wire must connect to the load only. If the black (white for SP-472 switch) wire is accidentally connected to the power source, permanent damage to the sensor may occur. | |
NPN output switch type |
PNP output switch type
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3. | An external protection circuit may be required if the reed switch is used with inductive load. For DC voltage, the diode must be connected, for AC voltage, the RC circuit must be connected as shown below. | |
DC power |
AC power R: 2,7kΩ C: 0,1µf/600V |
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4. | Keep sensors away form stray magnetic field to prevent malfunctions. | |
5. | When using reed switch with capacitive load or if the lead wire length exceed 10 meters, an inductor must be installed in series. | |
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