2 Assembly and installation
BU 0500 GB Subject to technical alterations 27
2.8.3 Motor cable (X2 - U, V, W, earth)
The motor cable may have a total length of 100m if this is a standard cable. If a screened motor cable is
used, or if the cable is laid in a metal conduit which is well earthed, the total length should not exceed 30m.
For greater lengths of cable, an additional output choke (accessory) must be used.
Note: Please also observe Section 8.4 EMC limit value classes.
Note: For multiple motor use
the total cable length consists
of the sum of the individual cable lengths.
Cable cross-section: 0.2 ... 6mm
2
stiff cable
0.2 ... 4mm
2
flexible cable
AWG 24-10
2.8.4 Braking resistor connection (X2 - +B, -B)
The terminals +B/ -B are intended for the connection of a suitable braking resistor. A short screened
connection should be selected.
Note: The great production of heat in the braking resistor must be taken into account.
Note: For devices with 115V mains voltage, no DC terminal is provided.
Attention: The terminals +B, -DC are suitable for the DC-
coupling of several frequency inverters. Never
connect a braking resistor to DC! For further details
of DC-coupling, please refer to Section 2.8.5.
Cable cross-section: 0.2 ... 6mm
2
stiff cable
0.2 ... 4mm
2
flexible cable
AWG 24-10
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