Installation
10
Electroluminescent LCD Touch Panels
Using the (DB-9) RS-232 connector for mouse control or data
The dual-function (DB-9) RS-232 connector supports most standard serial mouse control devices
and RS-232 communication protocols for PC data transmission.
The following table lists (DB-9) RS-232 connector pinouts and FIG. 10 shows the (DB-9) RS-232
connector and power supply wiring diagram.
Use connector pins 2, 3, and 5 for data and ground. For some applications, you may need to strap
pins 7 (request to send) and 8 (clear to send) together, depending on the PC.
(DB-9) RS-232 Connector Pinouts
Pin Signal
Function
1
N/A
Not used
2
RXD
Receive data
3
TXD
Transmit data
4
DTR
Data terminal ready (not used)
5
GND
Signal ground
6
DSR
Data set ready (not used)
7
RTS
Request to send (not used)
8
CTS
Clear to send (not used)
9
N/A
Not used
FIG. 10
DB-9 RS-232 connector and power supply wiring diagram
9
8
7
6
5
4
3
2
1
9
8
7
6
Female
Male
DB-9 (male)
DB-9 (female)
Power connector
Mouse or PC, DB-9 connector
Female
Male
Touch panel
DB-9 connector
Optional 7 to 8-pin
connector
2 (RXD)
3 (TXD)
5 (GND)
2 (RXD)
3 (TXD)
5 (GND)
+ (PWR)
- (GND)
12 VDC power supply
