User's Manual

XT30/XT50 Installation Guide Digital Monitoring Products
5
InstallatIon
Installation
4.1 Mounting the Enclosure
The metal enclosure must be mounted in a secure, dry place to protect the panel from damage due to
tampering or the elements. It is not necessary to remove the PCB when installing the enclosure. The PCB
maybeinstalledinthestandard340smallenclosureorintheoptional349mediumenclosure.
Enclosure Mounting Holes
Dual 1/2" and 3/4" Conduit Knockout
Battery Shel f
Enclosure Mounting Hole s
J1111
XT30/XT50
Phone Jack
Connector
Command Processor
Reset
J16
J4
J11
1
2
3
4
Slide panel PCB into lower enclosure slots
Panel
PCB
screw
Panel
PCB
screw
Model 349 Enclosure
Slide panel PCB between formed metal supports
Dual 1/2" and 3/4" Conduit Knockouts
Battery Shelf
Enclosure Mounting Holes
Enclosure
Mounting
Hole
Enclosure
Mounting
Hole
Phone Jack
Connector
J4
Command Processor
Reset
J16
J11
1
2
3
4
XT30/XT50
Panel
PCB
screw
Panel
PCB
screw
Model 340 Enclosure
Figure 2: Standard 340 Enclosure (left) or Optional 349 Enclosure (right)
4.2 Mounting Keypads
DMPkeypadshaveremovablecoversthatallowthebasetobemountedonawallorotheratsurfaceusing
the screw holes provided on each corner.
Formountingkeypadsonsolidwalls,orforapplicationswhereconduitisrequired,useaDMP695or696
keypadconduitbackbox.
4.3 Installation Specications
Severalfactorsdeterminetheperformancecharacteristicsofthekeypadbus:thelengthofwireused,the
numberofdevicesconnected,andthevoltageateachdevice.Whenplanningakeypadbusinstallation,
keepinmindthefollowingfourspecications:
1.DMPrecommendsusing18or22-gaugeunshielded wireforallkeypadcircuits.Do not use twisted pair
orshieldedwireforkeypadbusdatacircuits.
2.Onkeypadbuscircuits,tomaintainauxiliarypowerintegritywhenusing22-gaugewiredonotexceed
500feet.Whenusing18-gaugewiredonotexceed1,000feet.Toincreasethewirelengthortoadd
devices, install an additional power supply.
Note:Eachpanelallowsaspecicnumberofsupervisedkeypads.Addadditionalkeypadsinthe
unsupervisedmode.Refertothepanelinstallationguideforthespecicnumberofsupervisedkeypads
allowed.
3.Maximumdistanceforanyonebuscircuit(lengthofwire)is2,500feetregardlessofthewiregauge.
This distance can be in the form of one long wire run or multiple branches with all wiring totaling no
morethan2,500feet.Aswiredistancefromthepanelincreases,DCvoltageonthewiredecreases.
4.Maximumvoltagedropbetweenthepanel(orauxiliarypowersupply)andanydeviceis2.0VDC.Ifthe
voltage at any device is less than the required level, add an auxiliary power supply at the end of the
circuit.Whenvoltageistoolow,thedevicescannotoperateproperly.
Foradditionalinformationrefertothe710InstallationSheet(LT-0310)andortheLX-Bus/KeypadBusWiring
ApplicationNote(LT-2031).