Pin Assignment And Functions Of Terminal - NEC NC1500C User Manual

6. Appendix

6-7. Pin Assignment and Functions of Terminal

6-7-1. PC CONTROL connector (D-Sub 9 pin)
This is an RS-232C interface for controlling the projector head from a PC. The projector operates as a DCE (Data Communication
Equipment), so use a straight cable when connecting to a PC.
6 7 8 9
1 2 3 4 5
Internal Configuration Diagram of RS-232C Communication System
46
Pin RS-232C
Functions as RS-232C
No. Signal Name
1 CD Carrier detection
2 RXD Reception data
3 TXD Transmission data
4 DTR Data Terminal ready (Note 1)
5 GND Signal GND
6 DSR Data set ready (Note 1)
7 RTS Transmission request
8 CTS Transmission available
9 RI Ring indicator
Note 1: Do not use DTR and DSR signals when communicating.
Note 2: Connector operations vary according to the PC control signal switch
(CINEMA/SYSTEM). (When in SYSTEM, do not use RTS and CTS signals.)
PC Control Signal Switch
PC
RS-232C
Connector
Projector Connector Operation
Not used (N.C.)
Data transmission to an external device
Data reception from an external device
Connection to 6 pins
Signal GND
Connection to 4 pins
SYSTEM (Note 2): Hi-Z (Not used)
CINEMA (Note 2): Hi-Z (Used)
SYSTEM (Note 2): Fixed at -6.5 V (Not used)
CINEMA (Note 2): ± 10.5 V (Used: Depends
on communication status)
Not used (N.C.)
Projector NC1500C
CINEMA
SYSTEM
Cinema
Control Block
System
Control Block