Supply Voltage - Danfoss AK-LM 330 Design Manual

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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.
Example continued:
Controller module
+ 2 extension module in 100-series
Transformer size (least)
AK-LM 330
8 VA
4 VA
------
12 VA
RS8FR302 © Danfoss 2015-08
Transformer size
The power consumption grows with the number of modules used:
Module Type
Controller
Extension module 200-series
Extension module 100-series
Total
Number á Effect
1 x 8 = 8 VA
_ x 5 = __ VA
_ x 2 = __ VA
___ VA
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