9 rs 232c interface – KERN & SOHN IFS 300K-3 User Manual
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PC
D-SUB9P
Balance
D-SUB9P
9 RS 232C interface
The RS 232C interface allows a bi-directional data exchange from the balance to
external devices. This data exchange is asynchronous using ASCII - Code.
The following conditions must be met to provide successful communication between
the weighing system and the printer.
•
Use a suitable cable to connect the display unit to the interface of the printer.
Faultless operation requires an adequate KERN interface cable.
•
Communication parameters (Baud rate, parity, see chap. 8) of display device
and printer must match.
Pin allocation of balance output plug:
Pin nr.
Signal
Input/Output
Function
2
RXD
Input
Receive data
3
TXD
Output
Transmit data
4
DTR
Output
HIGH
5
GND
-
Signal ground
6
-
-
7
-
-
8
-
-
9
GND
-
Signal ground
Interface cable:
TXD
RX
GN
RX
TXD
GN
3
2
5
2
3
5