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Circuit Descriptions
Voltage
(DC 12V)
Vcc (DC 5V)
Circuit used
Relay Operation & LED Display
Power around MICOM & Sensor Detector
1) The input AC voltage drops to AC 8 volts on the transformer secondary side between ①~③ at CN
10. The rectified voltage passed through D101 ~ 104 becomes DC 5V through voltage regulator
MC7805(REG1).
This (DC5V) is supplied to the control board and sensor’s circuits.
2) The input AC Voltage drops to AC 15 volts on the transformer secondary side between ⑤~⑦ at
CN 10. The rectified voltage passed through D105 ~ D108 becomes DC 12V through voltage
regulator MC7812CT (REG2).
This (DC12V) is supplied to the relay operation and LED display.
It is designed for clock generation and time
calculation for synchronizing transmission and
reception on the logic elements inside the MICOM.
If the X-TAL specification changes, MICOM may
make an error.
(The standard components should be used.)
Port
Xin(#19)
Xout(#20)
Oscillating Frequency
4.00MHz
4.00MHz
±0.5% Error
10-1) Source Power Circuit
10-2) Oscillator circuit
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