ADOS S.R.L. Buccinasco (MI)
492-MTU10006 Rev. 4 Page 31 of 49
4.3.5 Serial port connection
The primary transmission line can be used in the R232 or RS485 mode (refer to section
“CONFIGURATION” for the operating modalities).
The auxiliary transmission line can be used in the R232 mode (refer to section “CONFIGURATION” for
the operating modalities).
Connections must be done with a shielded cable (RS232 lines) or with a twisted pair (RS 485 lines).
In the RS485 modality, put a 50 ? resistor in parallel (where necessary) to the signal of the unit that is
farthest from the HOST to correct for possible signal reflections.
TERMINAL PIN FUNCTION
M3 1 RX232 - RTX485 B
M3 2 TX232 - RTX485 A
M3 3 TX AUX
M3 4 SGROUND
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