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12
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 power supply must be used
for each controller. The power supply 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.
If using stepper motor valves, the supply for these must be pro-
vided from a separate power supply.
For CO 2 facilities, it will also be necessary to safeguard the voltage
to the controller and valves using UPS.
Example continued:
Controller module
+ 2 extension modules in 200 series 10 VA
+ 2 extension modules in 100 series
Power supply size (least)
42
8 VA
4 VA
------
22 VA
Capacity controller RS8GN202 © Danfoss 11-2013
Power supply 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
AK-PC 783
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