Siemens 620 Manual De Usuario

7-10

SIMATIC Box PC 620  Manual

A5E00131465-01

The serial port (COM 1) on the Box PC has the following pinout:

1

13

14

25

Figure 7-1 COM 1 Serial Port (Socket Connector)

1

-

Shield

-

2

TxD (D1)

Serial transmit data

Output

3

RxD (D2)

Serial receive data

Input

4

RTS (S2)

Request to send

Output

5

CTS (M2)

Clear to send

Input

6

DSR (M1)

Data set ready

Input

7

GND (E2)

Functional ground

(reference potential)

-

8

DCD (M5)

Data carrier detect

Input

9

+TTY RxD

TTY receive

Input

10 - 17

-

Unassigned

-

18

+TTY TxD

TTY send

Output

19

+20mA

Isolated current source

-

20

DTR (S1)

Data terminal ready

Output

21

-TTY TxD

TTY send

Output

22

RI (M3)

Incoming call

Input

23-25

-

Unassigned

-

*

The line current (TTY) interface is an optional product feature.