RayTek MI Miniature Infrared Sensor - Manual (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
RxA
RS232/485
Adapter
unit 1 unit
before
last
last unit
with shunt
activated!
unit 2
A A A
A
B B B
B