ICP DAS USA CAN-2084C, Руководство пользователя приложения

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CAN-2084C
User’s Manual (Version 1.00, Sep/2018) ------------- 13
2.6 Input Signal Model
Isolated Input (XOR=0)
The operational logic applied on CAN-2084C modules is a falling edge trigger.
(Normal High and Active Low) The external signal is input into a CAN-2084C
module through the isolation mechanism, with the signal being reversed from the
external signal. This internal signal is the suggested waveform, as the XOR
op
eration (XOR=0) doesn’t need to be executed.
The solution is shown below.
TTL Input (XOR=1)
When an external TTL signal is input into a CAN-2084C module through the TTL
mechanism, the signal will be the same as the external signal. This internal signal
isn’t the recommended waveform as the exclusive OR (XOR=1) operation must be
executed to invert the waveform.
The solution is shown below