2-21
Box PC 820 / PC FI45 V2, Manual
A5E00051531-03
2.8.16 Assignment of the COM 1 Port, X10
Pin No. Description Direction Pin No. Description Direction
1 Shield Ground 14 unassigned
2 Transfer data
(TxD/D1)
Output 15 unassigned
3 Receive data
(RxD/D2)
16 unassigned
4 Request to send
(RTS/S2)
Output 17 unassigned
5 Clear to send
(CTS/M2)
Input 18 +TTY Transfer data
(TxD)
Output
6 Data set ready
(DSR/M1)
Input 19 Current source, isola-
ted
positive
potential
7 Functional ground
(GND/E2)
Ground 20 Data terminal ready
(DTR/S1)
Output
8 Data carrier detect
(DCD/M5)
Input 21 -TTY Transfer data
(TxD)
Output
9 +TTY Receive data
(RxD)
Input 22 Incoming call (RI/M3) Output
10 -TTY Receive data
(RxD)
Input 23 unassigned
11 unassigned 24 unassigned
12 unassigned 25 unassigned
13 unassigned Housing Ground
2.8.17 Gender Changer for COM1
With the enclosed gender changer (25-pin plug/25-pin plug) you can ), you can
convert the COM1/RS232/programming device port for the SIMATIC PC family
device to the standard 25-pin plug connector. All you have to do is insert the
gender changer into the COM1 socket and screw tight with the two hexagonal
screws.
Pin-No. Meaning Pin-No. Meaning
1 Shield
2 Send data (TxD/D1) 14 Unassigned
3 Receive data (RxD/D2) 15 Unassigned
4 Switch on sender (RTS/S2) 16 Unassigned
5 Sender ready (CTS/M2) 17 Unassigned
6 Data set ready (DSR/M5) 18 TTY_TXD +
7 Functional ground (GND/E2) 19 + 12 V
8 Receiver signal carrier (DCD/M5) 20 End device ready (DTR/S1)
9 TTY_RXD + 21 TTY_TXD -
10 TTY_RXD - 22 Incoming call (R1/M3)
11 Unassigned 23 Unassigned
12 Unassigned 24 Unassigned
13 Unassigned 25 Unassigned
Motherboard
Siemens Distributor
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