Honeywell SDC User Manual
Page 8
Safety instructions
SDC / DHC
8 EN2H-0220GE51
R0308
2.2.1 Power
supply
Do not disconnect the controller from the mains supply!
The battery for saving all individualised data is otherwise
unnecessarily strained. The frost-protection function of the
controller is deactivated.
2.2.2 Connection
conditions
All electrical connection work may only be carried out by qualified
personnel!
2.2.3 Cable
cross-sections
1.5 mm
2
for all cables carrying 230 V (power supply, burner,
pumps, actuator).
0.6 mm
2
for bus cables (recommended type J-Y(St)Y 2 x 0.6)
0.5 mm
2
for sensors, selectors and analog signal cables.
2.2.4 Maximum
cable
lengths
Sensor, selector and analog inputs
We recommend using cables no longer than 200 m. Longer
connection lines could be used, but increase the risk of
interference.
Relay outputs
Unlimited cable length.
Bus connections
Max. length of 100 m from the first bus subscriber to the last one
(incl. wall modules).
2.2.5 Cable
installation
Install cables for sensors apart from the cables carrying 230 V!
Branch boxes in the sensor cable must be avoided!