Siemens SIMATIC Box PC 620 Manual page 147

Serial Port COM1 (PLC/V.24/Modem) *
The serial port (COM 1) on the SIMATIC Box PC 620 has the following pinout:
Figure 8-1 COM 1 Serial Port (Socket Connector)
Pin No.
2
3
4
5
6
7
8
9
10
18
19
20
21
22
1
11-17
23-25
* Without TTY for the basic variant of the Box PC
SIMATIC Box PC 620 Manual
C79000-G7076-C639-04
1
14
25
13
Designation Description
TxD (D1) Serial transmit data
RxD (D2) Serial receive data
RTS (S2) Request to send
CTS (M2) Clear to send
DSR (M1) Data set ready
GND (E2) Functional ground
(reference potential)
DCD (M5) Data carrier detect
+TTY RxD TTY receive
-TTY RxD TTY receive
+TTY TxD TTY send
+20mA Isolated current source
DTR (S1) Data terminal ready
-TTY TxD TTY send
RI (M3) Incoming call
- Shield
- Unassigned
- Unassigned
Hardware Information
Input /Output
Output
Input
Output
Input
Input
-
Input
Input
Input
Output
-
Output
Output
Input
-
-
-
8-15