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8.3
Data interface Com1 and Com2
The optional data interface can be used for data retrieval on site with data
retrieval software (e.g. SIGLON) or to connect to an external modem. The
baud rate can be set with DLXPARA to a value between 300 and 9600
baud. It is implemented as a 25 pin SUB-D connector (female) according to
ISO2110, the pin allocation is according to V.24/RS232C/DIN 66020.
Alternatively a 25 pin SUB-D male connector, a bus interface (20mA/CS,
M-Bus or RS485) or a FO connector (fiber-optic transmission connection)
can be used.
8.3.1
Pin allocation RS232 SUB-D (female)
The standard pin allocation of the data interface is identical with the service
interface (see page 78). For the connection between the DLX and a PC, a
modem cable is required. For the connection between a DLX and an exter-
nal modem a so-called null modem cable (crossed wires) is required.
8.3.2
Pin allocation RS232 SUB-D (male)
For the connection between the DLX and a PC, a null modem cable
(crossed wires) is required. For the connection between a DLX and an ex-
ternal modem a modem cable is required (1 to 1).
DLX (25 pins, male)
Input/Output
Pin No.
Output
2
Input
3
Output
4
Input
5
7
Input
6
Output
20
8.3.3
Pin allocation RS232 (Com1/X6 at 19"-rack only)
For the connection between the DLX and a PC, a special cable (5 wires) is
required.
Identification: Phoenix 5 pins PSC 1,5/5-M.
Input/Output Pin No.
Input
Input
Output
Output
Baud rate: 300 to 9600 Baud
cable
Pin No.
2
3
4
5
7
6
20
DLX (5 pins, male)
1
2
3
4
5
PC (25 pins, male)
Input/Output Standard usage
Output
TxD
Input
RxD
Output
RTS
Input
CTS
GND (protective earth)
Input
DSR
Output
DTR
cable
PC (25 pins, male)
Pin No.
Input/Output Standard usage
Output
4
Output
2
Input
3
Input
5
7
(transmit data)
(receive data)
(request to send)
(clear to send)
(data set ready)
(data terminal ready)
RTS
TxD
RxD
CTS
GND
79
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