1. Serial communications Basics
1
CD
2
RxD
3
TxD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
1
CD
2
RxD
3
TxD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
D9
female
D9
male
Image1-1
connection: IBM PC or compatible →projector
1
HSKo
2
HSKi
3
TxD-
4
GND
5
RXD-
6
TXD+
7
n.c.
8
RXD+
4
DTR
8
CTS
3
TxD
5
GND
2
RxD
DIN
mini 8
D9
male
Image1-2
connection: MAC →projector
Signal levels

Following table gives the signal levels corresponding to the different states:

State Voltage

Off = 1 -9V

On = 0 +9V

8R5976884 RLM SERIES 04/04/2006