66 HMI-640S User's Manual
5.7 Jumper settingsYou configure your card to match the needs of your application by
setting jumpers. A jumper is the simplest kind of electric switch. It
consists 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.
A pair of needle-nose pliers may be helpful when working with
jumpers. If you have any doubts about the best hardware configu-
ration for your application, contact your local distributor or sales
representatives before you make any changes.
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Closed 2-3Open Closed