NEC NC1700L - Page 116

116
Appendix
Circuit diagram
Shorting wire 1
Shorting wire 2
Interlock connector Inside projector
390Ω/0.5W resistor
390Ω/0.5W resistor
GND
4
3
2
1
100mA fuse
VCC +5V
Photocoupler
Connector no. Photocoupler ON/OFF Description
— +5V supply
ON/OFF Connects to the photocoupler anode inside the projector
Connects to the photocoupler cathode inside the projector
— Ground
• When the length of the wiring is less than 5 m (approximate)
Remove shorting wire 1 or shorting wire 2 and connect the external contacts (switch) to the projector interlock terminal ( and
or and ) by cable.
- The projector operates normally when the contacts are closed and the system shuts off when the contacts are open.
- A power supply external from the projector is not necessary.
- A maximum of 2 sets of external contacts can be connected. If you are only using a single set of external contacts,
connecting the shorting wire to the interlock terminal you are not using.
- The minimum rating required of the external contacts is 5mA.
• When the length of the wiring is at least 5 m (approximate)
Remove shorting wire 1 and shorting wire 2 and connect the external device to the projector interlock terminals ( and ) (do
not use
and ).
- Connect terminal
to the positive side of the external device and connect terminal to the negative side.
- The projector operates normally when a voltage in the range of DC5 to 16V is applied between terminals
and , and
the system shuts off when the voltage is 0V.
- The minimum rated current required of the external device varies depending on the voltage applied between the terminals
by the external device.
- When feeding the cable out from the projector, feed it so that it passes through the hole on the front face of the projector.
Pull the cable through here.