AK-LM
330
RS8FR302 © Danfoss 2015-08
37
Supply voltage
Supply voltage is only connected to the controller module. The
supply to the other modules is transmitted via the plug between
the modules. The supply must be 24 V +/-20%. One transformer
must be used for each controller. The transformer must be a class
II. The 24 V must not be shared by other controllers or units. The
analog inputs and outputs are not galvanically separated from the
supply.
The + and – 24V input must not be earthed.
Transformer size
The power consumption grows with the number of modules used:
Module
Type
Number á
Effect
Controller
1 x 8 =
8 VA
Extension module
200-series
_ x 5 =
__ VA
Extension module
100-series
_ x 2 =
__ VA
Total
___
VA
12
Example continued:
Controller module
8 VA
+ 2 extension module in 100-series
4 VA
------
Transformer size (least)
12 VA