Alstom iSTAT M355, Manual, Page: 64 / 154

M3x5/EN M/B User Manual
Page 62
iSTAT M3x5
10.12.3 Serial communication (COM2)
If the M3x5 uses RTC synchronisation over SNTP server (via Ethernet module), IRIG-B or
only 1PPS without date synchronisation, the serial communication port of RTC
Synchronisation module C is free to be used as a secondary communication port COM2.
Either RS232 or RS485 communication can be used, but not both at the same time. COM1
and COM2 are completely independent and can be used for the same purpose and at the
same time.
Module settings define parameters, which are important for the operation in RS485 network
or connections with PC via RS232 communication.
Factory settings for serial communication COM2 are

Device Address #33 (address range is 1 to 247)

Comm. speed 4800 (speed range is 2400 to 115200)

Parity none

Data bits 8

Stop bits 2
PLEASE NOTE
By default, addresses of COM1 and COM2 are the same (#33). When COM1 and COM2
have the same address any change of COM1 address sets COM2 to the same address.
When COM1 and COM2 have different addresses, change of COM1 address has no
influence on COM2 address. A change of the COM2 address never has an influence on
COM1 address.