Saia-Burgess Controls AG
Hardware manual for PCD3 series │ Document 26-789 ENG19│ 2018-06-29
Connections on orange terminal block
PCD3.Mxxx0 Classic CPU and expansion enclosure
3-38
3
3.15
Connections on orange terminal block
For all CPU types
Terminal block(Item no. 440549950) for
power supply, watchdog, interrupt inputs and port 2
Profibus
Pin Signal
Explanation
Signal
Wiring
1
D
Port 2
RS-485 up to 115.2kbit / s as free
user interface or Profi-S-Bus up to
187.5kbits / s (except PCD3.M5440 and
PCD3.M5540)
RxD/TxD-N
A
green
2
/D
RxD/TxD-P
B
red
3
Int0
2 interrupt inputs 24V
DC
or
1 quick counter 24 V
DC
4
Int1
5
WD
Watchdog
6
WD
7
+24V
Power supply
8
GND
RS-485 terminator switch
Switch
position
Description
Explanation
left
O
without terminators
right
C
with terminators
3.15.1
RS-485 (Port 2)
See chapter 5.3.9 General information and chapter 5.1 General information.