8.4
Connecting the DC-200/300 Scale to the Computer
In order to download the firmware to the scale, you will need to connect the RS-232C port on the DC-200/300 to
the COM1 or COM2 port on the computer. The maximum cable length is 15 meters, with an 8 pin male DIN plug
at the scale end and a 9 pin female D-Sub plug at the computer end. The pin configurations are shown below
Figure 8-14. Connection from Scale to PC
Pin Number
Signal
1
CD
2
RXD
3
TXD
4
5
GND
6
DSR
7
RTS
8
CTS
9
Table 8-2. Nine-Pin Female D-Plug Pins
Pin Number
Signal
1
2
GND
3
DSR
4
RXD
5
TXD
6
CTS
7
RTS
8
Table 8-3. Eight-Pin Male DIN Plug Pins
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