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10 PCM-3420 User's Manual
Locating Jumpers & Connectors
Setting Jumpers
You configure your PCM-3420 card to match the needs of your
application by setting jumpers. Jumpers are the simplest kind of
electric switch. They consist of two metal pins and a small metal clip
(often protected by a plastic cover) that slides over the pins to
connect them. To close” a jumper you connect the pins with the clip.
To open a jumper you remove the clip. Sometimes a jumper will have
three pins, labeled 1, 2, and 3. In this case you would connect either
pins 1 and 2 or 2 and 3.
The jumper settings are schematically depicted as follows:
A pair of needle-nose pliers may be helpful when working with
jumpers.
If you have any doubts about the best hardware configuration for
your PCM-3420 application, contact your local distributor or sales
representative before you make any changes.
1
3
2
Open Closed Closed 2-3
Open Closed Closed 2-3
1 2 3