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4.3.4.3. Earth connection
Two types of earth are usually present in distribution boards:
• (High-frequency) EMC earth comprising an unpainted metal wall, to which the drives and filters are connected, creating
an adequate electrical contact
• Protective earth (PE) according to EN60204-1 using conductors with a minimum cross-section of 10 mm
2
The length of the individual cables which connect to the earth must be minimal; for this reason, it is advisable to position an
earth bar as close as possible to the drives.
4.3.5. Power supply unit wiring
4.3.5.1. Earthing
Connect the filter and power supply housing to the structure of the board, making sure the contact surface is adequate
and the connection has low resistance and low inductance.
Avoid fitting the filter and power supply housing on painted surfaces.
4.3.5.2. Power supply cable connection
See section “2.2.3.3. Cables” of DM2020 manual for cable selection.
Fig 4.6 Connector X2
4.3.5.3. Brake resistor connection
See section “2.2.3.4. Brake resistor” for resistor selection.
X1 - R.R.
Connect
the brake resistor
on RR1
and RR2
RR2 RR1
Fig 4.7 Fixed brake resistor connector
Use a shielded cable for the connection, with shielding closed on the drive side.
MAR2-E-191
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