Siemens SIMATIC Box PC 620 Manual page 148

Hardware Information
Gender Changer for COM1
You can convert the COM1/V24 / AG port of the SIMATIC PC family into the usual
25 pin male connector by means of the enclosed gender changer (25 pin / 25 pin).
For this, you only have to plug the gender changer onto the COM1 socket and
secure it with the two hexagon head screws.
Pin No. Description
1 Screen
2 Transmitted data (TxD/D1)
3 Received data (RxD/D2)
4 Switch on sender
(RTS/S2)
5 Ready to transmit status
(CTS/M2)
6 Readiness for operation
(DSR/M1)
7 Functional ground (GND/
E2)
8 Receiving signal carrier
(DCD/M5)
9 +received TTY data (RxD)
10 -received TTY data (RxD)
11 not assigned
12 not assigned
13 not assigned
The V24 and TTY interfaces for COM1 can be alternately used. The factory set
default value is V24 operation. Switching from V24 to TTY operation is described in
Section 6.1.2.
8-16
Route Pin No.
Ground 14 not assigned
Output 15 not assigned
Input 16 not assigned
Output 17 not assigned
Input 18 +transmitted TTY data
(TxD)
Input 19 voltageless power source
Ground 20 Terminal ready (DTR/S1)
Input 21 -transmitted TTY data (TxD)
Input 22 Incoming call (RI/M3)
Input 23 not assigned
24 not assigned
25 not assigned
Housing Ground
Description Route
Output
positiv
potential
Output
Output
Input
SIMATIC Box PC 620 Manual
C79000-G7076-C639-04