Configuring dip-switch SW1 (IP20 discrete base units)
(Original Document)
About us
Configuration
The dip‐switch SW1 enables regulation of the leakage current according to the sensor used:
Leakage current (natural or induced)
SW1 position
The sensor has a leakage current between 0.45 mA and 1 mA.
ON
The sensor has a leakage current between 1 mA and 1.8 mA.
OFF
The following table shows the different possibilities.
Type of sensor
SW1
External adaptation
Illustration
2 wire proximity sensor with leakage current between 0.45 mA and 1 mA.
ON
No adaptation.
2-wire proximity sensor with leakage current between 1 mA and 1.8 mA.
OFF
No adaptation.
Limit switch reference XCM‐A1102 P2A.
OFF
No adaptation (Limit switch 2 fitted with 15 kΩ resistor connected to the open contact.).
Limit switch reference XCK‐J161••• fitted with a ZCK‐J82A module.
OFF
No adaptation.
Volt free contact or 3 wire proximity sensor with induced leakage current between 0.45 mA and 1 mA.
ON
Installation of a 33 kΩ +-5 % resistor in parallel with the 24 V sensor terminals.
Volt free contact or 3 wire proximity sensor with induced leakage current between 1 mA and 1.8 mA.
OFF
Installation of a 15 kΩ +-5 % resistor in parallel with the 24 V sensor terminals.
NOTE: the permissible open line resistance is:
  • 500 kΩ with SW1 in the ON position,
  • 200 kΩ with SW1 in the OFF position,
NOTE: for each of the channels, the wiring check function may or may not be enabled, which makes it possible to use sensors both with and without a leakage current.