1 2 3 4

A

B

C

D

4321

D

C

B

A Title

Number RevisionSize

A4

Date: 21-Nov-2002 Sheet of File: D:\PrjCir\RS232-TTY\M232TTY.SCH Drawn By:

U14N37

13

10

11

8

12

9

14

7

C1+1

C2+4

GN

D15

C1-3

VCC

16

R1

T1

T2

R2

C2-5

V- 6

V+ 2

V- 6

D1MAX232

U24N37

6

9

2

7

11

13

12

15

AG115UAG115U

+15V

+15V

For PLC S5-110U, S5-95U, S5-115U

PG Interface (DB15 socket)

VL2 Green

VL1 Red

R1300K

R2300K

R34.7K

Vin1

GN

D2

Vout 3

A1L05 VD2

Z15.6V

VD11N4001 VD3

VD4162738495

XS1

DB9

C5100mF 10V

C11mF 10V

C21mF 10V

+9-15V

-9-15V

C41mF 10V

C31mF 10V

IBM PC

1 1

2

Virgiliev

RS232- TTY Converter

Both LEDs should light constantly when there is no communiction (it's OK state)Apreciate LED should flash, when transmit/receive is active

VD2,3,4 should handle 30V 20mA (Shottky is better)All LEDs should handle 20mA

+5V

+5V

St. Petersburg, Russian Federation mikev@peterlink.ru

External Power source20 ma minimum output

LEDs VL1, VL2 should handle 20 maOptocupler's LEDs and output transistors also should handle 20ma

Don't make this connection! It will destroy isolation between PLC and PC with unpredictable results !!!