NEXCOM nROK 3000 - Manual (Page 25)

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Chapter 2: Jumpers and Connectors
Copyright © 2012 NEXCOM International Co., Ltd. All rights reserved nROK 3000 User Manual
Jumper
A jumper is the simplest kind of electric switch. It consists of two metal
pins and a cap. When setting the jumpers, ensure that the jumper caps are
placed on the correct pins. When the jumper cap is placed on both pins, the
jumper is short. If you remove the jumper cap, or place the jumper cap on
just one pin, the jumper is open.
Refer to the illustrations below for examples of what the 2-pin and 3-pin
jumpers look like when they are short (on) and open (off).
Two-Pin Jumpers: Open (Left) and Short (Right)
1
2
3
1
2
3
Three-Pin Jumpers: Pins 1 and 2 Are Short