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Siemens
GMA..1 actuators with spring return
CM2Z4614en
Building Technologies
2018-01-11
6 Wiring
notes
Prior to wiring, study all information in the following sections:
∂
"Safety notes" in chapter 4.1,
∂
"Device-specific regulations" in chapter 4.2,
∂
"Notes on EMC optimization" in chapter 4.3,
∂
"Diagrams" in chapter 9, and the
∂
HVAC plant diagram.
∂
This chapter is written for AC/DC24 V and AC 230 V (Information for AC 24... 48 V
on inquiry)
6.1 Permissible line length and cross-sectional
areas
The line lengths and cross-sectional areas depend on the actuators power consumption
and the permissible voltage drop of the connection lines to the actuators. Determine the
necessary line length from the following diagram and the formulas.
To determine the line length and cross section, adhere to the permissible operating
voltage tolerance at the actuator (see chapter 8, "Technical data") in addition to the
permissible voltage drop between the signal and supply lines (see table below).
The line sizing between the controller and the actuators depends on the actuator type
used and is determined on the following basis.
Type
Operating voltage
Line
Max. permissible voltage drop
GMA12..1
GMA13..1
AC/DC 24 V
G0, G
Y1, Y2
4 % each (tot. 8 %) of AC/DC 24 V
GMA16..1..
AC 24 V
G0, G
4 % each (tot. 8 %) of AC 24 V
DC 24 V
G0, G
1 % of DC 10 V
GMA32..1
AC 230 V
L, N
2 % each (tot. 4 %) of AC 230 V
Consider the following criteria:
∂
For modulating control and DC 24 V operating voltage:
The permissible positioning signal error caused by a voltage drop in the line current
(direct voltage mean value) on the G0 line must not exceed 1%.
∂
The G0 line's voltage drop caused by surges in the DC circuit in the actuator may not
exceed 2 Vpp.
∂
In the case of improper sizing of the G0 line, actuator load changes may cause
natural oscillation due to a change in the DC voltage drop.
∂
The supply voltage loss at AC 24 V may not exceed 8% (4% over G0 line).
Introduction
Note
Note
Permissible voltage drop
Notes on the G0 line
(GMA16..1)
