External Interfaces - Siemens SIMATIC Rack PC 840 V2 Operating Instructions Manual

Detailed descriptions
16.1 Motherboard
16.1.4

External interfaces

Interface
COM1
COM2
LPT1
PS/2 mouse
PS/2
keyboard
USB 2.0
PROFIBUS /
MPI
Ethernet
VGA
Serial port COM 1, X30
The serial port (COM 1) on the device has the following pinout:
Serial port COM 1 (socket)
Pin No.
1
2
3
4
5
6
7
8
9
10–17
18
19
20
21
22
23–25
16-4
Position Connector
External X30
External X31
External -
External X22
External X23
External X36
External X400
External X700
External X303
Abbreviations Meaning
– Shield
TxD (D1) Serial transmit data
RxD (D2) Serial receive data
RTS (S2) Request to send
CTS (M2) Clear to send
DSR (M1) Ready for operation
GND (E2) Functional ground (reference
potential)
DCD (M5) Data carrier detect
– –
– n.c.
– –
– –
DTR (S1) Data terminal ready
– –
RI (M3) Incoming call
– n.c.
Description
25-pin socket, V.24/V.28
9-pin, standard connector
25-pin, standard socket
6-pin, miniature DIN socket
6-pin, miniature DIN socket
First and second USB channel, additional third internal USB
channel via USB cable to the front panel
9-pin, standard socket, potentially isolated port
RJ45
15-pin socket
Operating Instructions, Edition 05/2006, A5E00248055-04
Input /Output
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Output
Input
Output
Input
Input
–
Input
–
–
–
–
Output
–
Input
–
SIMATIC Rack PC 840 V2