Power Supply; Connection Conditions; Cable Cross-Sections; Maximum Cable Lengths - Honeywell SDC Service Manual

Safety instructions
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
12

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.

Connection conditions

All electrical connection work may only be carried out by qualified
personnel!

Cable cross-sections

2
1.5 mm for all cables carrying 230 V (power supply, burner,
pumps, actuator).
2
0.6 mm for bus cables (recommended type J-Y(St)Y 2 x 0.6).
2
0.5 mm for sensors, selectors and analog signal cables.

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).

Cable installation

Install cables for sensors apart from the cables carrying 230 V!
Branch boxes in the sensor cable must be avoided!
SDC / DHC
EN2H-0221GE51 R0812