Hitachi RAS-E10H2 - Peripheral Circuits of Microcomputer

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COIL
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Interface relay
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Micro Computer
HIC 
TERMINAL
BOARD
(Communications from indoor microcomputer to outdoor microcomputer)
(Communications from outdoor microcomputer to indoor microcomputer)
Fig. 2-1 Indoor / Outdoor interface circuit
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Fig.
2
-1
sho
ws
the
interf
ace
circuit
used
f
or
the
indoor
and
outdoor
microcomputers
to
communicate
with each other
.
CONTROL P.W.B.
MAIN P.W.B.
35V
0V
0V 0V
5V
5V
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0V
- 45
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