Cable Dimensions And Maximum Cable Length - Rotex Controller Series Product Documentation

EbV
• All data bus cables must be carried out in shielded version.
Suggested version, see technical specifications on page 14-1
• The shielding of the cable has to be connected with earth potential to one side, i.e. boiler covering,
connecting terminals for earth potential etc. Multiple grounding is not permitted (humming loop).
Do not ground here!
Heat generator
Fig. 4: Single grounding of shielding
• In star shaped networks it is not permitted to ground cables on both sides. They should be grounded in
the centre.
Shielding
2-wire
data bus line
Fig. 5
• The outside sensor may not be installed close to transmitter- or receiver-equipment (on garage walls
close to receivers for radio-controlled garage door openers, ham operator antennas, radio controlled
alert systems or close to big radio transmission plants).
2.4

Cable dimensions and maximum cable length

• For all 230V~ cables such as power supply, burner, pumps, actuators: 1,5 mm
Maximum cable length:
Unlimited cable length within house installation.
• Data bus connections: 0.6 mm
Recommended cables:
J-Y(St)Y 2 x 2 x 0.6 mm
Maximum cable length: 50 m
Longer distances should be avoided to decrease the risk of interferences.
• For all low voltage cables such as sensors, extern selectors, bus and analogue in- and outputs, heat
requiring by means of extern contact, modem connection cables, etc.: 0.5 mm
Maximum cable length: 50 m
Longer distances should be avoided to decrease the risk of interferences.
PE
PE
Distribution terminal
Distribution box
2
2
Product documentation THETA NORM/UNIT
2
2
2-3