Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Communication interfaces
5
5-21
Serial interfaces on I/O module slots 0 - 3
5.5.4 Port x.0: RS-422 / RS-485 on the modul PCD2.F2100
The PCD2.F2100 module contains two different interface types on Port x.0: RS-422
with RTS/CTS and RS-485 (electrically connected). The line termination is integrated
into the module and can be enabled by means of a switch on the module.
RS-422 mode
RS-422
0 PGND
Tx
1
2
/Tx
Rx
3
4
/Rx
PGND 5
6
RTS
/RTS 7
8
CTS
/CTS 9
10-pole spring terminal block
Line termination in RS-422 mode always uses 150
Ω resistor on the PCD2.F2100
.
RS-485 mode
(Electrically connected RS-485 interface)
RS-485
0 PGND Rx-Tx 1
2 /Rx-/Tx
3
4
PGND 5
6
7
8
(SGD)
9
10-pole spring terminal block
Connection:
+5 V
Pull up
330 Ohm
Pull down
330 Ohm
Segment lenght max. 1200 m
max. 32 stations
Termination
Resistor
150 Ohm
+5 V
/RX-/TX
RX-TX
2
/n
1
n
/n
n
/n
n