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Telos Zephyr Xstream Two-Way Radio User Manual

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USER’S MANUAL

Section 3: GUIDED TOUR of the HARDWARE 33

ParallelInputs0‐7

Allinputsarespeciallytreatedtoaccepteitheravoltage(upto24VDC),oraclosuretoground,

whichmaybeprovidedbyswitches,relays,orlogicoutputs.Theinputsareactivelow.Inother

words,shortingtheinputtogroundcausesittobecometrue(i.

e."asserted").

Abuiltin1kΩpullupresistorisprovidedsoTTLoutputscanbedirectlyinterfaced.Seebelow

forasimplifiedschematicoftheinputcircuitry.

+5 VDC

(30 Volts max)

INPUT

PIN 25

Parallel logic input circuit

t

DEEP TECH NOTE!

The Zephyr Xstream’s “universal” logic input circuit (motherboard rev G and later) can be

used with switch or relay closures, voltage levels up to 24 Vdc, or logic outputs – either

“totem-pole” or open-collector.

TheinputscanbetransmittedtothefarendZephyrXstreamwhenusingtheLayer‐3,AAC,or

AAC‐LDcodingmodes.Theinputscanalsobeusedforlocalcontrolfunctionalitysuchas

triggeringDialSetups(PanicDial).RefertoSection11.5(DetailedMenuReference)forthemenu

selectionsrelatingtothesefunctions.

Analog

Inputs & Outputs

Inputs(SendtoNetwork)

TheseareComboConnectorswithXLRfemaleand¼”Tip‐Ring‐Sleeve(TRS)balancedfemale

inputs.Thepinoutisasfollows:

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