Interface description – Siemens TC35 User Manual
Page 26
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24
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
0 V
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
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