ETAS
Digital Input Channels ("DI" Connection)
ES930.1
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User Guide
33
If the digital input channel was defined as the source of events, they are for
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warded to the event unit for processing.
5.1.8
Counter Overflow Detection
32-bit counters that are independent of each other are the basis for the counter
function and for the time measurement. Each counter value corresponds to a
time unit of 15
ns. If a counter reaches its maximum value, a counter overflow
occurs. The counter continues the counting process. The counter overflow
detection assembly transmits every counter overflow to the diagnostics unit.
5.1.9
Electrical Isolation
The digital input channels "DI 1" to "DI 4" are not electrically isolated against
each other. The digital input channels are electrically isolated together as chan
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nel group to the supply voltage and as channel group to the housing of the
module.