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1
2
2
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3
4
4
D D
C C
B B
A A
Title
Num ber RevisionSize
A
Date: 1/28/2010 Sheet of
Fi le: N:\ PC B M GR \ ..\06731-3_ ADC.SchDoc 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
MAX 1 270BCAI+
+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
0.1uF
C14
0.1uF
C12
0.1uF
C1
0.1uF
C11
0.01uF
YEL
DS2
SCL
YEL
DS1
SDA
GND1
1
NC
2
VDD1
3
NC
4
SDA1
5
SCL 1
6
GND1
7
NC
8
GND2
9
NC
15
VDD2
14
NC
13
SDA2
12
SCL 2
11
GND2
16
NC
10
U5
ADuM2251
R1
4.75k
R2
4.75k
C8
0.1uF
C9
0.1uF
C2
0.1uF
C3
0.1uF
C4
0.1uF
C5
0.1uF
C6
0.1uF
C7
0.1uF
C10
4.7uF
AN-CH0
AN-CH1
AN-CH2
AN-CH3
AN-CH4
AN-CH5
AN-CH6
AN-CH7
R9
4.99
C27
4.7uF
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
D-36
07270B DCN 6512