Sensitivity of the input

The input circuit of the EL12xx is optimized for fast signal changes and the shortest possible signal detection. The time required for a signal change as a rising/falling edge from the terminal point at the front of the terminal to the logic of the central processing unit (ESC) is specified for the EL12xx series at T_ON/T_OFF < 1 µs, both for rising (T_ON) and falling edge (T_OFF). Due to this low absolute cycle time, the temperature drift of the cycle time is also very low.

It should be considered that the input circuitry has little or no filtering, depending on the type. It is optimized for fastest signal transmission from the input to the evaluation unit. Fast level changes/pulses in the µs range, e.g. due to possible EMC influences, thus arrive at the evaluation unit unfiltered/undamped and are possibly visible as a change of state of the input.
If necessary, shielded cables should be used to exclude environmental influences.