Digital Input/Output Modules

Example

Digital input module with 8 inputs (IB 23) or digital output module with 8 outputs (QB 23).

The address is the sum of binary significances set with the individual coding switches:

23 = 1 + 2 + 4 + 16 = 20 + 21 + 22 + 24

On Setting

(Switch Pressed)

 

 

 

 

 

 

 

 

 

 

 

IB 23

(or QB

23)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

128

64

32

 

16

8

 

4

2

1

 

 

 

 

 

 

 

 

 

ADB7

ADB6

ADB5

 

ADB4

ADB3

ADB2

ADB1

ADB0

 

 

 

 

 

 

 

 

 

 

Example

Digital input module with 32 inputs (IB 80) or digital output module with 32 outputs (QB 80).

The address is the sum of binary significances set with the individual coding switches:

80 = 16 + 64 = 24 + 26

On Setting

(Switch Pressed)

IB 80 (or QB 80)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

128

64

32

16

8

4

2

1

 

 

 

 

 

 

 

 

ADB7

ADB6

ADB5

ADB4

ADB3

ADB2

ADB1

ADB0

 

 

 

 

 

 

 

 

8-16

System Manual

C79000-G8576-C199-06

Page 328
Image 328
Siemens S5-135U/155U appendix IB 80 or QB