HP LD4210 42-inch LCD Digital Signage Display - Manual (Page 64)

C Command reference
Use this method to connect several products to a single PC. You can control several products at a time
by connecting them to a single PC. If the Set ID menu in Option is set to OFF, the monitor ID value
should be set between 1 and 99.
Connecting the cable
Connect the RS-232-C cable as shown in the following illustration. The RS-232-C protocol is used for
communication between the media player/computer and the display. You can turn the display on/off,
select an input source or adjust the OSD menu from the media player/computer.
RS-232C
(CONTROL)
OUT
IN
RS-232C
(CONTROL)
OUT
IN
RS-232C
(CONTROL)
OUT
IN
RS-232C
(CONTROL)
OUT
IN
1 2 3 4
RS-232-C configurations
7-Wire configurations
(Standard RS-232-C cable)
3-Wire configurations
(Not Standard)
media
player/
computer
Display media
player/
computer Display
RXD 2 3 TXD RXD 2 3 TXD
TXD 3 2 RXD TXD 3 2 RXD
GND 5 5 GND GND 5 5 GND
DTR 4 6 DSR DTR 4 6 DSR
DSR 6 4 DTR DSR 6 4 DTR
RTS 7 8 CTS RTS 7 7 CTS
CTS 8 7 RTS CTS 8 8 RTS
D-Sub 9
(Female)
D-Sub 9
(Female)
D-Sub 9
(Female)
D-Sub 9
(Female)
56 Appendix C Command reference ENWW