1

1

2

2

3

3

4

4

5

5

6

6

D D

C C

B B

A A

Title

Number RevisionSize

A

Date: 7/7/2014 Sheet ofFile: D:\altium files\..\INDO420.SchDoc Drawn By:

1

2

34

5

6

7

89

10

11

1213

14

1516

-IN

+IN

CT

REF com NOISE

TRIM

REF Fb

REF out

REF in

RCV out

RCV fb+V -V

RC

V c

om

IC1RCV420

+15 -15

P150K

+15

-15

4-20ma input

+c-1

23

X3A A

1

2

34

5

6

7

89

10

11

1213

14

1516

-IN

+IN

CT

REF com NOISE

TRIM

REF Fb

REF out

REF in

RCV out

RCV fb+V -V

RCV

com

IC3RCV420

+15 -15

P3 50K

+15

-15

4-20ma input

+c-

R111A

10K

C102

0.01u

R121

10K

+5VmaxINVERTER1

INVERTER2

123456789101112

X5

+24

-24

+15

-15

B

R1225K1

R123

10K

C103

10u

CW

P4

20K

+15V

-15V

R118

10K

R114

10K

R1165K1

R115

10K

C10810u

CW

P2

20K

R117

10K

R11947K

R120

10K

C109

0.01u

123

X4A

12

3

4

11

IC2ALF347

5

67

IC2B

LF347

89

10 IC2C

LF347

12

3

4

11

IC4A

LF347

5

67

IC4B

LF347

89

10 IC4C

LF347

12

3

4

11

IC6A

LF347 5

67

IC6B

LF3478

9

10 IC6C

LF347

-15

+15

TP4

TP5

C118 10u C11910u

+15VIC14

7815+24V

C117474

LD31

TP2

TP1

C11610u

-15VIC13

7915C115474

LD32

TP3

-24V

R18110K

R18210K

DUAL TRACK

R131

150

R134150K

R1325K1

D9

MD lim

+15

Q1

2N3069

R135

5K1

D10

FUL

L M

DR12610K

R12410K

R12810K

R125

20K

R127

10K

R12910K

CW

P920K

-15

C11010M

TP13

C111

4.7u

R130

300K

C114

4.7u

D11MD LIM SET

-ve MD F/b

TP12

CV

R13310K

R13610K

12

3

4

11

IC7A

LF347

89

10 IC7C

LF347

12

1314

IC7D

LF347

+15V

-15V

R138

10K

R1405K1

R139

10K CW

P10

20K

PLC

R13710K

TP4

TP5CV

REF-A

89

10 IC5CLF347

+15V

-15V

12

3

4

11

IC5A

LF347 5

67

IC5B

LF347

CWP550K

C10110u

TP7

C1054.7u

12

1314

IC5D

LF347

-15

C107

0.01u

12

1314

IC2D

LF347

REF-B

89

10 IC12CLF347

+15V

-15V

12

3

4

11

IC12A

LF347 5

67

IC12B

LF347

CW

P750K

C10410u

TP7

C106

4.7u

12

1314

IC12D

LF347

-15

+5Vmax -10V

-10V

-10V

-10V

P650K

P850K

+15V

D1D2

D3

D4

+15V-15V

-15V

3

8

7

5

1

2

6

4

IC9

MC633

+15V

-15

C112

2M2

INV. VOLT

INV. CURR.

+

+

-

-COMMON

TP4

TP5

V F/B

I F/B

1234

X1

0 TO +2.5V DC

+15V

D8

D5

D6

D7+15V-15V

-15V

3

8

7

5

1

2

6

4

IC11

MC633

-15

C113

2M2

INV. VOLT

INV. CURR.

+

+

-

-COMMON

TP4

TP5

V F/B

I F/B

1234

X2

0 TO +2.5V DC

12

34 5

67

8

SW1A

R10110K

R102

10K

R103

10K

R104

10K

R10510K

R106

10K

R107

10KR108

10K

R110

10K

R10910K

R111

10KR112

10K

R11310K

R14110K

R142

10K

R143

10K

R14410K

R145

10K

R146

10K

R14710K

R148

10KR149

10K

R150

10K

R151

10K

R152

10K

R15310K

R154

10K

R155200K

R156200K

R157200K

R158

200K

R159100K

R160

1K

R161220

R162

10K

R163

10KR16410K

R165

10K

R16610K

R167

1K

R168

200K

R169200K

R170200K

R171

200K

R172100K

R173

1K

R174220

R175

10K

R176

10KR17710K

R178

10K

R17910K

R180

1K

12

34

8

IC8A

LM1558

5

67

IC8B

LM1558

12

34

8

IC10A

LM1558

5

67

IC10B

LM1558

+15V