1) If door is open, door S/W contact is closed. Then MICOM receives “low” signal and detects
door open then, Relay control circuit receives “HIGH” signal and turn Lamp on.
2) If door is closed, door S/W contact is open. Then MICOM receives “high” signal and detects
door close then, Relay control circuit receives “LOW” signal and turn Lamp off.
DOOR
F
R
Door Conditions
CLOSE
OPEN
CLOSE
OPEN
Door S/W Contact
OPEN
CLOSE
OPEN
CLOSE
MICOM
PIN NO
# 39
# 40
Micom Input Voltage
“HIGH”
“LOW”
“HIGH”
“LOW”
6-5. Temperature Sensor
1) The sensor uses the characteristics of thermistor. If temperature goes higher, resistance goes
lower. On the contrary, if temperature goes lower, resistance goes higher.
2) MICOM input voltage is counted by sensor as follows.
(V
CC : 5V, RTH : Sensor reisitance)
3) For the resistance information on temperature and MICOM input voltage, please refer the
conversion table. (Page. 41)
RTH
VF = X Vcc
RTH + R301
When Sensor is open
MICOM input “HIGH”
When sensor is cut off
MICOM input “LOW”
( Air Sensor)
21
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