Sierra Wireless 20070914 Manual

A SERVICE OF

next previous

PinPoint X HSDPA

53 20070914

Digital Inputs

Figure 7-2: Digital Input Contact Closure

Bymeasuringcontactclosuresonswitches,thedigitalinputs

canreportasimpleopenorclosedstate.Eachofthefour

digitalinputscanbewiredtothetwogroundsignalsviaa

switch.Whentheswitchisopen,theinputwillread“OPEN”.

Whentheswitchisclosedandthe

inputisconnectedto

ground,theinputwillread“CLOSED”.

• Whenadoororotherlatchisopenedorclosed.

• Countingpulsesorotherelectronicevents.

• Whenagaugereachesacertainpoint.

• Whenacontainerfillsorempties.

• Whenaswitchorvalveisopenedorclosed.

• Whenthetowbarisraisedorlowered.

• Connectedtoasensor,theleveloffuelinavehicle.

• Whenthetrunkofavehicleisop enedorclosed.

• Whentheignitionisturnedonoroff.

Relay Outputs

Asanelectronicswitchwhichcanbeopenedorclosed

(NormallyOpenrelay),arelaycanbeusedtotransmitan

actiontoanotherdevicebysignallingtothatotherdevicean

“on”or“off”.AsaNormallyOpenrelay,thecircuitofthe

relayisdisconnected(open)unlessitis

active.Whentherelay

isactive,thecircuitisconnected(closed).

• Settingoffanalarmorsiren.

• Triggeringaprocesstostartonanotherdevice.

• Openingorclosingavalveorswitch.

• Lockingorunlockingadoor.

• Turningalightonoroff.

• Openingthevehicle’strunkordoors.