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Actuator Wiring (Three-Position) - Siemens OpenAir GEB 1 Series Technical Basics

Actuators without spring return
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Line length for actuators
connected in parallel
Assumption
Actuators with three-
position control
GEB13..1
Power consumption and
perm. voltage drop with
one actuator
P&I diagram:
Conduction currents at
AC 24 V
Example:
Parallel connection of two
actuators
Siemens
Building Technologies
The following sections show how to determine the permissible line length and cross
sections for the various actuators based on examples.
The examples for actuators connected in parallel apply to the following arrangement:
L1
Controller
L1
The line resistances of L2 are equal and can be ignored for L1. Separately calculate the
permissible line lengths L2 for other connections (ring, star-like).
6.2

Actuator wiring (three-position)

In three-position actuators, only the situation as presented under AC 24 V is important.
Sizing occurs via lines 1 (G), 6 (Y1), and 7 (Y2).
The table shows the main power consumption of an actuator as well as the permissible
voltage drop.
Operating
Power
voltage/pos. signal
consumption
AC 24 V
3.5 VA
The diagram shows the currents in the connecting lines for one actuator.
AC 0,15 A
AC 24 V
1
0 V
6
0 V
7
Determining the line lengths for two actuators GEB13..1 and AC 24 V supply.
Only the currents in line 1 (G) and 6 (Y1) or 7 (Y2) determine the line sizing.
Max. permissible voltage drop = 4% per line (total 8 %).
Consumption = 2 x 3.5 VA = 7 VA.
Line current = 2 x 0.15 A = 0.3 A.
Max. permissible single line length: 280 m at 1.5 mm
Technische Grundlagen: Drehantriebe GEB...1
G0
L2
A1
G
G0
G
L2
A2
G0
G
G0
G
L2
A3
G0
G
G0
L2
A4
G
Perm. voltage drop for line
1 (G), 6 (Y1), 7 (Y2)
Χ
U/U = max. 8 % (4 % each per line)
GEB13...
G
M
Y1
Y2
2
line cross section.
23/44
CM2Z4621en
2017-05-26

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