Siemens TC35 Terminal Guida Utente Scaricare il pdf (Pagina 26)

Interface description

Purpose of the connectors/connections

Use and operation

In order to control the Terminal and transfer

data, the customer application (e.g. host

computer) is connected via the RS232 cable.

Signal

name

PIN I/O Description Parameters

DCD 1 O The functions

correspond to those

of a serial interface

on the basis of a

V.24 protocol.

active high >5V

low <–5V

RXD 2 O logical 1=low <–5V

logical 0=high >+5V

TXD 3 I active high >2.4V

low <1.8V

DTR 4 I active high >2.4V

low <1.8V

GND 5 0V

DSR 6 O active high >5V

low <–5V

RTS 7 I active high >2.4V

low <1.8V

CTS 8 O active high >5V

low <–5V

RI 9 O active high >5V

low <–5V

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 38 39

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Siemens TC35 Terminal Guida Utente Pagina 26