1

2

3

4

5

6

7

ATmega328P Connections +5V

IC1

(PCINT6/XTAL1/TOSC1)PB6 (PCINT7/XTAL2/TOSC2)PB7 (PCINT8/ADC0)PC0

C13

C5

100nF

100nF

D3

LED

1

(PCINT9/ADC1)PC1 (PCINT10/ADC2)PC2 (PCINT11/ADC3)PC3

2

(PCINT12/SDA/ADC4)PC4 19 22

B

ADC6

(PCINT14/SCL/ADC5)PC5

ADC7

(PCINT14/RESET)PC6 (PCINT16/RXD)PD0 (PCINT17/TXD)PD1 (PCINT18/INT0)PD2 (PCINT19/OC2B/INT1)PD3 (PCINT20/XCK/T0)PD4

21 5 3

GND

(PCINT21/OC0B/T1)PD5

GND

(PCINT22/OC0A/AIN0)PD6

GND

(PCINT23/AIN1)PD7

17

8

24 25

+5V

D0 D1 D2

27

9 10 11

GND_485

PTC1

MAX485

1

SCK

EN

2 4 6

CPU_RESET

A

2

4 FUSIVEL_RESETAVEL

T17

P9

1 3 5

CPU_RESET

31

2

TX

RX TX

30

1

U9

+5V

EN

29

32

3

MISO

26

28

C14 100nF

7

23

22pF

MOSI MISO SCK

8

AREF

16

VCC

R3 1k

(PCINT5/SCK)PB5 20

15

2

TRANSORB

6

MOSI

RX

1 5

(PCINT4/MISO)PB4

ICSP - 3X2

7

GND

(PCINT3/OC2A/MOSI)PB3

ICSP Header Connector (Header - 328P)

+5V

GND_485

X0 X1 X2 X3 X4 X5

B

PTC2

GND_485

1

B

2

FUSIVEL_RESETAVEL

T18

0R R15

AVCC

14

22pF

18

13

C6

(PCINT1/OC1A)PB1 (PCINT2/OC1B/SS)PB2

X6 X7

C7

VCC

12

16MHz

6

A

+5V

(PCINT0/CLKO/ICP1)PB0

X1

+5V

VCC

10k R2

4

9

MAX 485 Connections (Driver and Protections)

A

Power LED

8

TRANSORB

GND_485

ATMEGA328P-A

Output Connector (Input Board - BUS)

C

Input Protection Circuits (Input Conectors - Atmega 328P )

C

+5V

J1

C8

C12

D2

100uF

100nF

D1

GND

D0 PWR_FLAG +5V

CPU_RESET 5V 5V 24V

X0

R16 4k7

E2+

K 4

E

C15 100nF

4N25

E1-

D5 1

D2

74HC04

2

U6

1 Fairchild S1M

2

A

B C

U5E

11

10

X1

74HC04

2

K 4

E

4N25

E2-

2

6 5

1k R27

U5A

1

1k R9

D1

Fairchild S1M

100nF

+5V

6 5

B C

D15 1

LED

2

LED

D

+5V +5V

R8 10k

R24 10k +5V

DB25

E3+

R4 4k7

U2

1

C2 100nF

A

+5V

6 5

B C

U5B

3

4

X2

R17 4k7

E4+

74HC04

2

K 4

E

C9 100nF

4N25

E3-

D8 1

U7

1

A

B C

U5F

13

12

X3

74HC04

2

K 4

E

4N25

E4-

2

6 5

1k R28

+ D

C1

A

D11

GND_485

U1

1

Fairchild S1M

PWR_FLAG

R1 4k7

1k R12

A B

+5V

E1+

D4

GND +5V

R23 10k +5V

Fairchild S1M

PWR_FLAG

+5V

R7 10k

13 25 12 24 11 23 10 22 9 21 8 20 7 19 6 18 5 17 4 16 3 15 2 14 1

D16 1

LED

2

LED E

E

Input Connectors

+5V

E3+

1

CONN_2

P2 P3

2

C3 100nF

U3 A

B C

+5V

6 5

U5C

5

6

X4

R18 4k7

E6+

1

74HC04

2

K E

C10

4

100nF

4N25

E5-

CONN_2

E3-

1

D9 1

U8 A

U11A

1

2

X5

74HC04

2

K E

4

4N25

E6-

2

B C

6 5

1k R29

2

R5 4k7

Fairchild S1M

E2-

E5+

D12

1

1k R13

E2+

R25 10k +5V

Fairchild S1M

2

D6

E1-

R10 10k

CONN_2

1 P1

+5V

E1+

D17 1

LED

2

E7-

1 2

R6 4k7

1

C4

P7

E7+

+5V

E7+

100nF

+5V

U5D

9

8

X6

P8

R19 4k7

E8+

1

74HC04

2

K E

4

C11 100nF

D10 1

1 2

B C

CONN_2

E8-

G

A

6 5

4N25

E7E8+

U4

B C

6 5

U11B

3

4

X7

74HC04

2

K E

4

4N25

E8-

2

U10 A

1k R30

2

Fairchild S1M

E6-

R26 10k

D13

1

+5V

R11 10k

1k R14

E6+

+5V

Fairchild S1M

2

F

D7

E5-

P4

1

CONN_2

E5+

P5

2

P6

E4-

CONN_2

1

CONN_2

E4+ F

CONN_2

LED

D18 1

LED

2

LED G

File: OpenPLC-Input Board.sch Sheet: / Title: OpenPLC Input Board Size: User Date: 26 apr 2014 KiCad E.D.A. 1

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