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5 4 3 2 1

D

C

B

A

L

Chassis GND

Signal GND

UbattKDSR

DTR

TxD

GND

Rx D

CTS

RTS

D CD

VCC

VCC_12V

VCC

VCC

VCC

VCC_12V

Title

Size Document Number Rev

Date: Sheet o f

1.0

Interface ISo 9141 KL

A4

1 1Monday, March 23, 2009

Prise DB9 Femelle OBDPrise DB9 Male RS232

C2

100n

R3

1k

U4

LM7812C

IN1

OUT2

GND

3

D1

D1N4001

P2

CONNECTOR DB9

59483

7261

Q32N2222A

R4

1k

R5

10k

R1

10k

Q12N2222A

C11u

P1

CONNECTOR DB9

59483

7261

R6

10k

R2

1k

Q22N2222A