09.02 Connection
Siemens AG 6SE7087-6AK85-1AA0
3-19
Rectifier/Regenerating Unit Operating instructions
Pin assignment for interface cable X300:
1
2
3
4
5
9
8
7
6
1
2
3
4
5
9
8
7
6
on PC, COMx: male
on cable: female
on 6SE70 device, X300: female
on cable: male
3.4 Measures for keeping to RFI suppression regulations
So that you can observe the radio interference regulations, you must note the following points:
• Grounding
The converter necessarily generates radio interference as it functions. It is necessary to return them to
source via a connection with as low resistance as possible (cross-sectional area of ground connection ≥
cross-sectional area of network connection).
Use the best grounding opportunity when installing the rectifier/regenerating unit and optional radio
interference suppression filters (e.g. mounting plate, grounding cable, ground bus). Interconnect all
conductive housings with a large contact surface.
For interference suppression not only the cross-sectional area (observe safety regulations in case of fault),
but especially the contact surface is important because high-frequency interference currents do not flow
through the entire cross-sectional area but mainly along the outside skin of a conductor.
• Shielding
To reduce interference and observe the radio interference suppression levels,
- shielded cable must be used between the converter output and the motor and
- shielded control cables laid.
The shield must be connected to ground potential at both ends.
• Filters
The radio interference filters must be connected before the infeed unit. The housings must be
interconnected conductively.
To observe the radio interference suppression regulations, A1 interference suppression filters are
recommended.
NOTICE
Perform hipot tests on systems with radio interference suppression filters with direct voltage because of the
filter capacitors!
Control cables that are directly connected with the converter are always shielded so that the highest possible
interference immunity is achieved. The shield must be grounded at both ends.
To avoid coupled interference, control cables directly connected to the device must be routed separately from
power cables. Minimum distance 20 cm.
If converters are installed in systems by authorized workshops, interference immunity can be ensured by other
suitable wiring practices.
See also "SIMOVERT MASTERDRIVES Installation instructions for design of drives in conformance with EMC
regulations“ under "Documentation" on the DriveMonitor CD-ROM of the inverter or converter "compendium"
Chapter 3.
AoteWell Automation Sales Team
Buy Siemens PLC HMI Drives at AoteWell.com
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