Detailed descriptions
16.1 Internal components
SIMATIC IPC427C
110
Operating Instructions, 04/2009, A5E02414743-01
16.1.3.6
PROFIBUS
PROFIBUS interface, 9-pin (socket)
Pin no.
Short description
Description
1-2
NC
Not connected
3
LTG_B
Data line (I/O)
4
RTS_AS
Turn on PLC transmitter (O)
5
GND
Ground isolated
6
P5V_dp_fused
+5 V (fused) isolated
7
NC
Not connected
8
LTG_A
Data line (I/O)
9
RTS_PG
PG Request to send (O)
16.1.3.7
CAN bus
CAN bus port, 9-pin (socket)
Pin no.
Short description
Description
1
-
Reserved
2
CAN_L
CAN bus signal (L active)
3
CAN_GND
CAN station ground
4
-
Reserved
5
-
Reserved
6
-
Reserved
7
CAN H
CAN bus signal (H active)
8
-
Reserved
9
-
Reserved
NOTICE
The permitted maximum length of the CAN bus cable is 30 meters.