User's Manual

Doc.: HD0389-00-Manuale_TL_GWCxxxx_r.0.1_EN.doc-00 17/04/2011 Page 33 of 49
3.5.5. CN4 CN5: RS232 and RS485 connections #1 #2
GWC device could be equipped with up to 2 RS232/485 serial
interfaces, depending upon specific device version.
RS232/RS485 physical interface is a 9 poles SUB-D type connector
Please refer to software manual for further information about how
serial interfaces work.
Connection
table
Segnali Pin Funzioni
n.c. CN4(5).1 not connected
Rx CN4(5).2 RS232 receiver input
Tx CN4(5).3 RS232 transmitter output
n.c. CN4(5).4 not connected
GND CN4(5).5 RS232 Interface Signal ground
+Rx CN4(5).6 RS485 receiver +side (input)
+Tx CN4(5).7 RS485 transmitter +side (output)
-Rx CN4(5).8 RS485 receiver –side (input)
-Tx CN4(5).9
RS485 transmitter –side (output)
Wiring
requirements
Please use shielded cable having wires with 0.5mm
2
(#20AWG) or
0.25mm
2
(#23AWG) section. For the RS485 connection please use a
cable having twisted pairs.
Connector pin-out
i
9
8
7
3
2
6
5
4
1
GND
n.c.
Tx (RS232)
Rx (RS232)
n.c.
+Rx (RS485)
+Tx (RS485)
-Rx (RS485)
-Tx (RS485)
i