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IBM PCM-6890B manual COM3/COM4 RI pin voltage select J3, J4, +12V, COM3 RI pin setting J4

Models: All-in-One FC/Socket 370 Celeron PCM-6890B

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COM3/COM4 RI pin voltage select (J3, J4)

COM3/COM4 RI pin voltage select (J3, J4)

The 9th pin of COM3 and COM4 (9-pin D-sub connector) can be selected as RI, +5V, or +12V by setting J3 & J4.

COM3 RI pin setting (J4)

 

RI*

 

+5V

+12V

1

3

5

1

3

5

1

3

5

J4

 

 

 

 

 

 

 

 

2

4

6

2

4

6

2

4

6

COM4 RI pin setting (J3)

 

 

 

 

 

 

 

RI *

 

+5V

+12V

1

3

5

1

3

5

1

3

5

J3

 

 

 

 

 

 

 

 

2

4

6

2

4

6

2

4

6

*default

18 PCM-6890B User Manual
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Page 28
Image 28
IBM PCM-6890B manual COM3/COM4 RI pin voltage select J3, J4, +12V, COM3 RI pin setting J4, COM4 RI pin setting J3
Page 27 Page 29