TVS VR 1
R 2
GND2
R 3
5
6
7
UVR B
LM324
R 4R 5
C 3
C 4
R 6
AN6
GND4
32
1
4
11
UVR A
+V2
-V2
R 1
C 1
+V4
FJ 1
FJ 2
R Lo u
Eart h
+V1
GND1
22
33
DVR 3
B AV99
R 0
绝缘电阻检测
C 2
D2