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Siemens
Actuators without spring return GEB…1
CM2Z4621en
Building Technologies
2017-05-26
The diagram applies to AC 24 V and shows the permissible line length
L
as a function
of consumption
P
and as a parameter of the line cross sections.
300
200
100
0
0
8
16
24
32
L
[m]
P
[VA, W]
2.5 mm²
1.5 mm²
1 mm²
0.5 mm²
0.75 mm²
4
62
6D
0
2e
n
∂
The values in [VA, W] on the P-axis are allocated to the permissible voltage drops
(
Χ
U/2U = 4 %) on line L as per the above table and to the P&I diagram.
∂
P is the primary power consumption for all actuators connected in parallel.
U
Χ
U/2
Χ
U/2
R
L
R
L
L
L
U
,Χ
U
4
61
4D
0
9
M
The maximum line length can be calculated using the following formula.
Operating voltage
Perm. voltage
drop / line
Formula for line length
AC 24 V
4 % of AC 24 V
L =
P
A
1313
∂
Ζ
m
∴
1 % of DC 10 V
L =
(DC)
I
A
5.47
∂
Ζ
m
∴
AC 230 V
2 % of AC 230 V L =
46
∂
P
A
1313
∂
Ζ
m
∴
A
Line cross section in [mm
2
]
L
Permissible line length in [m]
P
Power consumption in [VA] or [W];
The value is printed on the actuator's type plate.
I(DC) DC current portion in line G0 in
Ζ
A
∴
Line length/consumption
AC 24 V
Notes on diagram
P&I diagram:
Voltage drop on the supply
lines
Formula for line length
