Moeller XControl XC600, Hardware, Engineering And Function Description, Page: 15 / 78

07/04 AWB2700-1428GB
Design
11
Project engineering
Control cabinet design
The arrangement of the components in the control cabinet has a
major influence on the interference-free operation of the system
and machinery. During the planning and design stages, as well as
during implementation, it must be ensured that the power and
control sections are separated. The power section includes the
following components:
• Contactors
• Coupling modules
• Transformers
• Frequency inverters
• Power converters
The system should be divided into areas of different power and
EMC levels, for the effective prevention of electromagnetic
interference. In small control cabinets, using sheet metal as
dividing panels is often sufficient to reduce interference effects.
Ventilation
A minimum gap of 5 cm between passive components must be
provided in order to ensure sufficient ventilation. If active
components (e.g. load power supply, transformers) are fitted next
to each other, a minimum gap of 7.5 cm must be ensured. Observe
the values specified in the technical data.
Device assignment (XC600 with uninterruptible power
supply)
Mount the uninterruptible power supply (UPS) unit and the PLC
horizontally in the control cabinet, as shown in the following
diagram. Mount the unit on a top-hat rail with 15 mm root face
width
Suppression of interference sources
X
Keep all suppressor circuits as close to the interference source
(contactor, relay, solenoid) as possible.
Shielding
X
Connections to data interfaces should be implemented with
shielded cables. General guideline: the lower the coupling
impedance, the better the shielding effect.
Figure 8 : Control cabinet design
a Gap > 50 mm
b Gap > 75 mm from active elements
c Cable duct
d UPS
h As a rule, switched inductors should be fitted with
suppressor circuitry.
a
c
d
a
b
a
b
a
a a b