Technical data

Hardware Information
8-16
SIMATIC Box PC 620 Manual
C79000-G7076-C639-02
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 Route Pin No. Description Route
1 Screen Ground 14 not assigned
2 Transmitted data (TxD/D1) Output 15 not assigned
3 Received data (RxD/D2) Input 16 not assigned
4 Switch on sender
(RTS/S2)
Output 17 not assigned
5 Ready to transmit status
(CTS/M2)
Input 18 +transmitted TTY data
(TxD)
Output
6 Readiness for operation
(DSR/M1)
Input 19 voltageless power source positiv
potential
7 Functional ground (GND/
E2)
Ground 20 Terminal ready (DTR/S1) Output
8 Receiving signal carrier
(DCD/M5)
Input 21 -transmitted TTY data (TxD) Output
9 +received TTY data (RxD) Input 22 Incoming call (RI/M3) Input
10 -received TTY data (RxD) Input 23 not assigned
11 not assigned 24 not assigned
12 not assigned 25 not assigned
13 not assigned Housing Ground
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.