Technical data

SED2 Operation & Maintenance Manual Addendum
132 Siemens Building Technologies, Inc.
• Check that the contactors in the control cabinet are suppressed, either with RC circuits for AC
contactors or flywheel diodes for DC contactors. In both cases, mount the suppressors to the
coils. Varistor surge voltage protectors are also effective. This is important when the SED2
relay controls the contactors.
5191Z01
Figure 2. Use Grounding Clamps to Bond the Shield.
L1
L2
L3
PE
wvu
5192Z04en
Min. 16 mm²
(4 AWG)...
compensating cable
Install all cables on the
same side of the plate
Min.200 mm
(7.8 inches)....
between
control cables,
motor cables and
mains cables
Motor cable
Mains power supply
Min.10 mm² (6 AWG)...
PE: min.10 mm² (6 AWG)...
Remove cable
insulation
Control cables
Grounding rail
Motor
Figure 3. Routing Control, Mains, and Motor Cables.