
29
Magtrol Model 5300 Three Phase Power Analyzer Appendix A: Schematic Drawings
CIRCUIT BOARD 78B147 - CONVERTER BOARD
R24
20K
+15V
C13
.001
U5
Vo
+V
12
+IN
14
132
3
4
1
-IN
9
8
COM
COMP
11
10
6
7
Fo
VFC320CG
5
-V
C
+15V
U6
7
6
8
2
3
1
54
6N137
-15V
R15
1.5K
R22
34.8K
U9
Vo
+V
12
+IN
14
132
3
4
1
-IN
9
8
COM
COMP
11
10
6
7
Fo
VFC320CG
5
-V
C
R23
10M-15V
R21
20K
C12
.1
R29
20K
R28
10M
C15
.001
P1
48
+15V-15V
R16
470
C10
.1
U10
Vo
+V
12
+IN
13
14
2
3
4
1
-IN
9
8
11
COM
COMP
10
6
7
Fo
VFC320CG
5
-V
C
+15V
R27
32.4K
R26
20K
+15V
U2
Vo
+V
12
+IN
14
132
3
4
1
-IN
9
8
COM
COMP
11
10
6
7
Fo
VFC320CG
5
-V
C
R7
1.5K
C3
.001
C4
330pf
R5
20K
+15V-15V
-15V
C8
.001
-15V
C9
330pf
+15V
R12
10M
C5
.1
R8
470
P1
46
5V
+15V
U3
7
6
8
2
3
1
54
6N137
+15V
C27
.01
5V
C29
.01
+15V
C6
2.7
U4
Vin
12
11
BFo
14
132
3
COM
4
1
BFi
Cav
RMSo
8
10
+V
-V
9
7
DENi
AD637KQ
dBo
5
6
OFFS
CS
R9
24.3K
P1
35
P1
37
U7
OUT
12
11
+V
13
14
3
X2
2
1
X1
-V
AD534LD
8
Z1
Z2
10
96
7
Y1
Y2
SF
4
5
-15V
R10
50K
+15V
R47
750K
R11
34.8K
+15V
R13
20K
-15V
-15V
R20
301K
C42
.1
C28
.01
C7
2.2
+15V
C41
.1
C1
2.7
P1
23
P1
25
P1
29
R46
750K
P1
27
R2
50K
-15V
+15V
R3
34.8K
+15V
R4
10M
-15V
U1
Vin
12
11
BFo
14
132
3
COM
4
1
BFi
Cav
RMSo
8
10
+V
-V
9
7
DENi
AD637KQ
dBo
5
6
OFFS
CS
R1
24.3K
C39
.1
C26
.01
C40
.1
C2
2.2
C22
.1
U14
4
5
2
1
6
4N36
C19
.1
R39
1.5K
R40
1.2K
+15V 5V
R45
1.2K
U15
4
5
2
1
6
4N36
C25
.1
5V
R44
1.5K
C24
.1
+15V
U11
7
6
8
2
3
1
54
6N137
R31
470
P1
44
P1
50
CR2
1N4148
CR1
1N4148
C38
1
P1
47
P1
45
P1
49
5V
-15V
C31
.01
R19
100K
R18
20K
U8
6
1
5-
2
7
LF351
+
4
3
C14
330pf
C16
330pf
C32
.01
+15V
-15V
C11
.47
C30
.01
+5V
5V
C33
.01
+15V
-15V
C17
.1
R32
470
R25
820
R30
820
R42
10.0K
+15V
R41
10.0K
P1
19
-15V
P1
17
C37
1
+5V
C35
1
C36
1
P1
18
P1
16
P1
15
R43
249K
U16
-
+
+V
8
72
1
GND
LM311N
5
BAL
STR
6
-V
4
3
U13
-
+
+V
8
72
1
GND
LM311N
5
BAL
STR
6
-V
4
3
-15V
C21
.1
C23
.1
C34
.1
-15V
U12
6
7
-
2
OP7
4
3
+
R34
17.8K
R33
1.69K
R35
10.0K
+15V
C18
.1
-15V
CR3
1N821
+15V
-15V
R38
249K
R17
200K
C20
.1
R36
10.0K
R37
10.0K
VOLTS OUT
AMPS OUT
+
VOLTS COM
VOLTS
+
+
A5 COM
AMPS
A100 COM
A25 COM
+
VOLTS OL
WATTS OUT
CHASSIS COM
AMPS OL
+5V+
-15V
+15V
+
++
POWER COM
SIGNAL COM
+5V
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