Olympus TH4 - Remote ON;OFF Operation; Controlling Light with External VR

11
Fig. 6
2
Remote ON/OFF Operation
(Fig. 6)
}The lamp can be turned off by shorting pins 4 and 2 of the DIN 8-pin
connector.
#The external wiring should have a wire gauge of AWG28 (0.1 mm
2
) or
more.
#The external contact should be fully capable of switching 10 mA on
and off.
#When the lamp is to be turned on/off with the open collector, connect
the emitter to pin 2.
Fig. 7
3
Controlling the Amount of Light with External VR
(Fig. 7)
Inside the power
supply unit
}The amount of light can be controlled between MIN and MAX by connect-
ing an external VR.
1. Connect a VR as shown in Fig. 7.
2. Set the main switch to “ I ” (ON).
3. The amount of light is minimized when the voltage at pin 1 is 0 V and
maximized when it is +5 V.
#The external wiring should have a wire gauge of AWG28 (0.1 mm
2
) or
more.
#Use an external VR of 10 0.1 W.
+5 V
ANALOG IN
6
1
4
2
4
Inside the power
supply unit
5.1 V
Vcc (13.5 V)
10
4.7