NEC PH1202HL Installation Manual page 83

Remote Interlock Terminal
This terminal functions as safety device for the projector. The contacts are normally closed. When an abnormality
occurs, the contacts open to immediately stop the projector (interlock state) (shipped with a shorting bar installed).
By replacing the shorting bar with wiring and attaching it to the contacts, the projector can be immediately stopped
remotely when an abnormality occurs in the projector.
Follow the following procedure to recover from the interlock state.
1. Disconnect the AC power supply to the projector unit.
2. Close the contact to the remote interlock terminal.
3. Connect the AC power supply to the projector unit.
Remote interlock terminal (exterior view)
#4
#3
#2
#1
• The remote interlock terminal is equipped on inside of the lens cover.
Remove the lens cover for connection.
• Securely reinstall the lens cover.
• The bottom side of the lens cover is notched. Settle the connected cables by the clamp under the terminal and
draw them out to out of the projector from the notch.
Circuit diagram
Interlock terminal
#4
4
Shorting bar 2
#3
3
#2
2
Shorting bar 1
#1
1
Terminal no. Photocoupler ON/OFF
#1 -
#2 ON/OFF
#3
#4 -
Shorting bar 2
Shorting bar 1
Clamp for settling cables
Inside projector
GND
2
780Ω/1W resistor
1
500mA fuse
1
VCC +5V
+5V supply
Connects to the photocoupler anode inside the projector
Connects to the photocoupler cathode inside the projector
Ground
3
4
Photocoupler
Description
69
6. Appendix