Honeywell ACS-8 Installation Instructions Manual page 23

Installation Instructions / ACS-8
Current consumption of the devices in the example:

Calculation of the line cross-section with 40m cable length:
The required line cross-section can be determined from diagram 1 or 2 (page 30/31).
The maximum voltage drop of the line is 0.5V. If the ACS-8 is not equipped with a battery, a voltage drop
of 2V-3V is possible. This means that smaller cross-sections can be used if the length is kept constant or
longer lengths can be used if the cross-section is kept constant.
Module supply:
Total current consumption of the modules:
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 (Ø 0.6mm):

Calculation of the number of wires with a wire cross-section of 0.5mm² (diameter 0.8mm):

contactless / proximity reader (026390.10)
4I/2O-module (026592)
door strike
contactless / proximity reader (026390.10)
4I/2O-module (026592)
total:
R = Uv =
L
I
i = electrical conductivity = 56m
A = 2 x L
R x i
L
no. of wires =
no of wires =
500mV = 1.67Ω
300mA
of copper
Ωmm²
= 2 x 40m
1.67Ω * 56m
Ωmm²
0.855mm² =
0.28mm²
0.855mm² = 1.71 wires ! 2 wires
0.5mm²
70mA
230mA
230mA
70mA
230mA
300mA
= 0.855mm ²
3.05 wires ! 3 wires
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