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2 FUNCTION DESCRIPTION
1) ELECTRIC CIRCUITS
TRANS secondary side is composed of electric power circuits for RELAY driving electricity (12Vdc) and for supplying electricit y to MICOM
and IC (5Vdc). The voltage in each part is as follows.
VA1 is the part to protect over voltage and noise. When more th an 385V is applied, the thermal-fuse(130°C cut-off, local
option) in a first part of TRANS is cut so that the elements in the secondary side of TRANS are protected.
CIRCUIT for occurring CLOCK which motivates the internal local element of IC1 to transmit and receive an information and BASIC TIME
for calculating time. Use a proper form for OSC 1. Because in c ase that SPECIFICATION is changed, the calculated time in IC1 i s
changed or IC1 isn't able to operate.
3) RESET CIRCUIT
All the internal parts of MICOM(IC1) return to the initial cond ition when the early power ON or apply power again in MICOM aft er
temporary power failure. As a result, all the functions operate according to the early condition. At the early period of power ON the "LOW"
voltage is applied in the RESET terminal of MICOM for the fixed time. The RESET terminal is 5V during the general operation.
PARTS
both ends of VA1
both ends of
VOLTAGE
230Vac
14Vac
17Vdc
12Vdc
5Vdc
2) OSCILLATION CIRCUIT
11
9
VA1
14821
both ends of CE1
both ends of CE2
both ends of CC2
transformer
KIA7042
