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2.1
CONNECTIONS, CONTINUED
2.1.2 PC Control
The HDCD8TP can be connected to a PC or other RS232 system at the PC Control
connector.
RS232 commands inputted at the PC CONTROL connector are converted to RS485 and
outputted on all eight (8) RS485 O/P connectors
RS485 replies received on any of the eight (8) O/P connectors are converted to RS232
and then outputted at the PC Control connector. The pin-outs for the 9-pin D connector
are shown in Figure 4.
RX DATA = Data from the receivers going to the transmitter
TX DATA = Data from the transmitter going to the receivers
NOTE: Only the RX DATA, TX DATA, and GND signals are used by the HDCD8TP.
Rev. B
Solder side view of 9-pin D plug
5
4
9
Figure 4: 9-Pin D connector connections (PC Control)
PIN
1
2
3
4
5
6
7
8
9
The control signals DTR, CD, and DSR are connected together and RTS and
CTS are connected together inside the unit.
3
2
1
8
7
6
CONNECTION
CD
RX DATA
TX DATA
DTE
GND
DSR
RTS
CTS
N/C
3
HAMU000876
12/29/04
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