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Installation
ForaninstallationoftwoormoresensorsinaRS485network,each
sensoriswiredparalleltotheothers.
Youmayconnectupto32units.Makesuretodeactivatethepreset
shuntresistorforallunitsexceptforthelastone.Thepositionofthe
switchtodeactivatethe
shuntyoucanseeontheelectronicboardin
thefigureabove.
Beforeunitsareinanetworkthemultidropaddressneeds
tobedefined.Eachsensormusthaveauniqueaddress!
Thefollowingfigureillustratesthewiringofsensorsinamultidrop
installation.
RxB
Rx
A
RS232/485
A
dapter
unit 1
unit
before
last
last unit
with shunt
activated!
AB A
A
A
B B
B
unit 2
Figure22:WiringtheRS485Network
Theaddresssettingcanbedoneeitherthroughbuttonsorthrough
softwarealternatively
.
AddressingthroughButtons
Press the <Mode> button until “M” becomes
visible. Use the <Down> and <Up> buttons
untiltherequestedaddressappears.Pressthe
<Mode>buttontoacknowledgeyourselection.
AddressingthroughSoftware
Alternativelythesensorcanbec ontrolledbymeansoftheoptional
availablesoftwareDataTempMultiDrop.
32 MID