gefran DIGISTAR II Installation And Operation Manual page 15

Serial port COM1 (11)
Male DB9 connector. The serial line on COM1 can be configured in RS232, RS422, RS485 mode.
Configuration is carried out by moving the relevant dip switches according to the table provided below.
In order to access the dip switch, open the rear cover on DIGISTAR II or on GF-BOX, see specific
paragraph.
Nr. Pin
Signal
1 DCD
2 RX
3 TX
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
The serial configured in RS422 is opto-insulated.
The serial configured in RS485 is opto-insulated.
n.c. = do not connect
80544B_MHW_DIGISTAR II - DIGISTAR II Control - GF-BOX_02-2013_ENG
TABLE MODE COM1:
RS232
Function
Data Carrier Detect
Receive Data
Trasmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
Ring
RS422
Signal Function
RX- Receive Data -
RX+ Receive Data +
TX+ Transmit Data +
TX- Transmit Data -
GND Ground n.c.
n.c.
n.c.
n.c.
n.c.
RS485
Signal Function
TX+/RX+ DATA+
TX-/RX- DATA-
GND Ground n.c.
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