Digi 90000278_B manual SW1

Page 19

Chapter 4 S a m p l e A p p l i c a t i o n : T T L S i g n a l s t o E I A - 2 3 2

The following figure is an example of how to convert the Digi One EM signals to normal serial voltage levels.

CONNECTOR

 

 

 

 

 

 

 

 

 

 

 

 

RS-232 SERIAL 9-PIN

P1

 

 

 

 

 

DB9

 

 

10 SHIELD

11 SHIELD

 

1

2

3

4

5

6 7

8

9

GND

 

 

 

 

GND

 

 

 

 

2

 

 

0.1uF

C3

0.1uF

+5V

 

 

 

1

1

C5

2

GND

4TX

 

13

 

17

9

4

27

23

18

2

3

1

28

25

 

RECVR 5RX

U1

 

 

 

 

 

 

 

 

 

 

 

 

 

ADM211E

RS-232 LINE

 

12

14

15 16

8

5

26

22

19

7

6

20

21

24

GND

C6

1

0.1uF

2

 

 

 

 

 

 

 

 

 

 

 

 

C4

1

0.1uF

2

 

 

 

 

 

 

 

 

 

 

 

 

 

+5V

 

 

 

 

 

 

 

 

 

 

 

 

ONE EM CONNECTOR

P6

1 2

3 4

5 6

7 8

9 10

11 12

SOCKET 2X6

 

 

 

 

DIGI

 

 

 

 

 

 

 

 

 

 

 

 

3 4

 

 

 

 

 

 

 

 

 

 

 

SW1

RESET SWITCH

 

 

 

 

 

GND

 

1

2

3

GND

 

1 2

 

 

 

 

 

 

 

P5

 

 

 

 

GND

 

 

 

 

 

 

 

HEADER

 

 

 

 

 

 

 

 

 

 

 

 

RESERVED

 

 

 

Digi One EM Hardware Reference

19

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Contents Hardware Reference Manual Digi One EM Page Contents Appendix B Digi One EM Certifications About This Guide T r o d u c t i o nIntroducing the Digi One EM Support Information Digi One EM Drawing O u t t h e D i g i O n e E MConnectors Power and Serial Interface P4 Connectors Ethernet Interface P1 LEDs Reset SwitchBlinking 1-1-1 means Overview O u t t h e D e v e l o p m e n t B o a r dDevelopment Board Illustration DB-9 Serial Interface P1 Pin SignalReset Switch SW1 Power Jack P7 CR9 LEDs CR4 CR11SW1 Appendix a D i g i O n e E M Specification s FCC Part 15 Class a Appendix B D i g i O n e E M C e r t i f i c a t i o n sIces 003 Class a Product SafetyDigi One EM Hardware Reference Digi One EM Hardware Reference
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