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INSTALLATION
2.4.4
Auxiliary RS232 Interface
The auxiliary serial interface is used exclusively for RS232 point-to-point or RS232
Master/Slave connections.
The parameters relative to the aux interface (baud rate, data bits, etc.) as well as
particular operating modes such as LOCAL ECHO can be defined using the WinHost
utility program or "Host Mode" programming installed from the diskette.
The following pins of the spring clamp connector are used to connect the RS232
auxiliary interface:
Pin
29
27
30
28
31
Figure 17 - RS232 auxiliary interface connections using hardware handshaking
When the auxiliary interface is permanently connected as part of the system cabling,
it is recommended to connect the cable shield to earth ground.
Name
RXAUX
TXAUX
CTSAUX
RTSAUX
SGND
DP1200
29
RXAUX
27
TXAUX
30
CTSAUX
28
RTSAUX
31
SGND
Function
RS232 received data
RS232 transmitted data
RS232 clear to send
RS232 request to send
RS232 signal ground
USER INTERFACE
TXD
RXD
DTR
DCD
SGND
2
19
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