Digital inputs of switches and IPLOG monitoring units can be switched to ALARM mode supporting balanced loops used in alarm systems.
It is basically the analog inputs with a variable resistance of connected alarm loops in the range of 0 ....30kΩ. The method of loop balancing and the resistance corresponding to separate statuses can be easily set in the application SIMULand.
Double balanced zone with failure signaling
Double balanced zone with failure and masking signaling
Example of setting a balanced loop
Red text in the menu mean that the settings are not saved to the device.