Installation
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.
RxB
RxA
RS232/485
Adapter
BA
unit 1
BA
unit 2
|
|
|
|
| B |
|
| last unit |
|
|
|
|
| A |
|
| with shunt |
|
|
| B | A |
|
|
| activated! |
unit
before
last
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.
32 | MI |