Hardware Information
Release 04/02

7-11

Panel PC 670 Computing Unit, Equipment Manual
Serial interface COM1 (AG/V24/Modem)

The serial interface (COM 1) of the computing unit is assigned as follows:

1
13
14
25
Figure 7-1 Serial interface COM1 (female)
Pin No. Short Name Meaning Input/Output
1 - Shield -
2TxD (D1) Serial transmission data Output
3RxD (D2) Serial received data Input
4RTS (S2) Request to send Output
5CTS (M2) Clear to send Input
6DSR (M1) Data set ready Input
7GND (E2) Functional ground (reference
potential) -
8DCD (M5) Data carrier detect (carrier) Input
9+TTY RxD TTY receive Input
10 - 17 -Not assigned -
18 +TTY TxD TTY send Output
19 +20mA Isolated current source -
20 DTR (S1) Data terminal equipment ready Output
21 -TTY TxD TTY send Output
22 RI (M3) Incoming call Input
23-25 - Not assigned -