RayTek MI Miniature Infrared Sensor - Page 40

Installation
32 MI
ForaninstallationoftwoormoresensorsinaRS485network,each 
sensoriswiredparalleltotheothers.
Youmayconnectupto32units.Makesuretodeactivatethepreset
shuntresistorforallunitsexceptforthelastone.Thepositionofthe
switchtodeactivatethe
shuntyoucanseeontheelectronicboardin
thefigureabove.
Beforeunitsare inanetworkthemultidropaddressneeds
tobedefined.Eachsensormusthaveauniqueaddress!
Thefollowingfigureillustrates thewiringofsensorsinamultidrop
installation.

Figure22:WiringtheRS485Network

The address setting can be done either through buttons or through
softwarealternatively
.
AddressingthroughButtons
Press the <Mode>  button until “M” becomes
visible. Use the <Down> and <Up> buttons
until the requested address appears. Press the
<Mode>buttontoacknowledgeyourselection.

AddressingthroughSoftware
Alternatively the sensor can be controlled by means of theoptional
availablesoftwareDataTempMultiDrop.
RxB
Rx
A
RS232/485
A
dapter
unit 1
unit
before
last
last unit
with shunt
activated!
unit 2
A
A
A
A
B
B
B
B