Schematics

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
SEQUENTMICROSYSTEMS.COM
PI CONN 3.1
16 INPUTS
A
5 6Saturday, February 13, 2021
Title
Size Document Number Rev
Date: Sheet of
SDA
SCL
RASP_TX
RDPB
RASP_TX 485_TX
RS485B
485_RX
RS485A
+5V
C2
.22uF
R43
4.3K
J7
KY15RB
1
2
D18
SM712
12
3
R19 100
J1
PI-CONN
1
3
5
7
9
25
39
2
4
14
20
30
34
11 12
13
6
8
10
15
17
16
18
19
21 22
23 24
26
27 28
29
31 32
33
35 36
37 38
40
R30 10
U6
SP3485
8
3
5
2
4
6
7
1
VCC
DE
GND
RE
DI
A
B
RO
SW1
R44
4.3K
R20 100
1
2
J71
KY15K
R29
4.3K
R39 10
Q1
HX3400
SDA
SCL
GND
INTN
+5V3.3V
RASP_RX0
RASP_RX
GND
3.3V