Hitachi RAF-25RPA Service Manual page 65

Outdoor microcomputer
Indoor microcomputer
35V DC line
Fig. 3-2 Voltages Waveforms of indoor / Outdoor Microcomputers (Outdoor to Indoor Communications)
Outdoor microcomputer
Indoor microcomputer
35V DC line
Fig. 3-3 Voltages Waveforms of indoor / Outdoor Microcomputers (Indoor to Outdoor Communications)
Pin
44
62 Pin
Pin
52
51 Pin
Pin
44
Pin
62
52 Pin
51 Pin
65
0.7V
0V
5V
0V
5V
0V
5V
0V
35V
0V
5V
0V
5V
0V
5V
0V
35V