Basic Documentation

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Siem ens GMA..1 actuators with spring return CM2Z4614en
Building Technologies 2018-01-11
The diagram applies to AC/DC 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
4626D02en
∂ The values in [VA, W] on the P-axis are allocated to the permissible voltage drops
(ΧU/2U = 4 %) on line L as per the above table and to the P&I diagram.
∂ C 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
4614D09
M
The maximum line length can be calculated using the following formula.
Operating voltage Perm. voltage drop / line Formula for line length
AC/DC 24 V
4 % of AC/DC 24 V
L =
P
A1313 ∂
Ζm∴
1 % of DC 10 V
L =
(DC)I
A5.47 ∂
Ζm∴
AC 230 V 2 % of AC 230 V
L = 46 ∂
P
A1313 ∂
Ζm∴
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 ΖA∴
Line length/consumption
AC/DC 24 V
Notes on diagram
P&I diagram:
Voltage drop on the supply
lines
Formula for line length