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1
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2
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3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A
Date: 1/28/2010 Sheet of
Fi le: N:\PCBMG R \ ..\06731-3_ADC.Sch Doc Drawn By:
Auxiliary I/O Board (ADC)
A
33
RT
06731
1
2
3
4
5
6
7
8
9
P1
ANALOG INPUT
+5V-ISO
CH0
15
CH1
16
CH2
17
CH3
18
CH4
19
CH5
20
CH6
21
CH7
23
NC
4
NC
7
SHTDN
13
VDD
2
VDD
1
SDA
9
SCL
5
A2
10
A1
12
A0
6
REF
27
NC
8
AGND
14
REF-AJ
26
DGND
3
NC
22
NC
24
NC
28
NC
25
NC
11
U1
MAX1270BC AI+
+5V
GND
GND
+5V-ISO
SCL
SDA
ISO-GND
ISO-GND
ISO-GND
+5V-ISO
1 6
52
U4A
NC7WZ17P6X
3 4
U4B
NC7WZ17P6X
ISO-GND
+5V-ISO
ISO-GND
1
3
2
4
5
6
U2
SMS12
C13
0.1u
C14
0.1u
C12
0.1u
C1
0.1u
C11
0.01u
YEL
DS2
SCL
YEL
DS1
SDA
GND1
1
NC
2
VDD1
3
NC
4
SDA1
5
SCL1
6
GND1
7
NC
8
GND2
9
NC
15
VDD2
14
NC
13
SDA2
12
SCL2
11
GND2
16
NC
10
U5
ADuM2251
R1
4.75k
R2
4.75k
C
0.1u
C9
0.1u
C2
0.1u
C3
0.1u
C4
0.1u
C5
0.1u
C6
0.1u
C
0.1u
C10
4. u
AN-CH0
AN-CH1
AN-CH2
AN-CH3
AN-CH4
AN-CH5
AN-CH6
AN-CH7
R9
4.99
C2
4. u
ISO-GND
+5V-ADC
ISO-GND
ISO-GND
ISO-GND
ISO-GND
R3
2.2k
R5
2.2k
R6
2.2k
1
3
2
4
5
6
U3
SMS12
R4
2.2k
07266B DCN6845
D-23