Honeywell ACS-8 Installation Instructions Manual page 24

24
Power supply door strike:
Current consumption:
Calculation of the maximum line resistance:

Calculation of the required cross-section:

Calculation of the number of wires with a wire cross-section of 0.28mm² (diameter 0.6mm):

Calculation of the number of wires with a wire cross-section of 0.5mm² (diameter 0.8mm):

Result:
Line cross-section for module supply:
Line cross-section for the supply of the door strike:
J-Y(St)Y 5x2x0.6Ø or 4x2x0.8Ø can be used as the power supply for the module electronics and the bus
line, providing the the cable length does not exceed 40m.
A separate line with a minimum line cross-section of 0.66mm² must be used to power the door strike.
230mA
R = Uv
L
I
i = electrical conductivity
A = 2 x L
R x i
L
no. of wires =
no. of wires =
= 500mV =
230mA
=
= 2 x 40m
2.17Ω * 56m
Ωmm²
0.66mm² =
0.28mm²
0.66mm² =
0.5mm²
0.855mm²
0.66mm²
Installation Instructions / ACS-8
2.17Ω
56m of copper
Ωmm²
= 0.66mm²
2.25 wires ! 3 wires
1.32 wires ! 2 wires