Chapter 8 Tutorial

Multifunction Module

W

n

dxu RZ 9:A6=I °t”u xqyt >3ry xysx qu vuqtyywyq4

iquqt u q u ry sq

 

 

svywu q ys”tu q tywy4

 

iquq q q”qusyvys ryq q

 

 

sxqwu y tu y sxqu”4 dxu sxqu”

xqu ru

 

q u ”yu°4

 

dxu yq” 1;f ””3 sy q”” u tywy us su ”y“u °ys3yu ”y°yyu4

An open input floats to +5V and is read as a “1”. An input shorted to ground is read as a “0”. An example of a contact closure detection channel is shown below.

 

 

+5 V

 

 

 

10 kΩ

 

 

+

 

I/O Line (1 of 8)

 

 

 

Digital Read

+TTL

 

 

Reference

 

 

 

(+2.1 V)

Limit Switch

 

 

 

9A8

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Image 388
HP 34970A manual Multifunction Module