Hello all,
I've found what is wrong with my input module! I guess I've correct found the type (SOT143 code C8B). It is quad diode bridge, HSMS-2828 (Broadcom/Avago/HP).
With this part same signal on two channels looks like this:
After I short this bridge:
I get normal signal for both channels:
HSMS-2828 is obsolete and do not exist anymore by digikey or mouser...
Question, can somebody suggest some replacement for HSMS-2828?
Best regards,
Dimitrij