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Wiring
1 - Sheet steel grounded casing supplied with the speed controller, to be fitted as indicated on the
diagram.
2 - BLEMO-ER21
3 - Non-shielded power supply wires or cables.
4 - Non-shielded wires for the output of the safety relay contacts.
5 - Attachment and connection to ground of the shielding of cables 6, 7 and 8 as close as possible to the
speed controller :
- strip the shielding
- use cable clamps of an appropriate size on the parts from which the shielding has been stripped, to
attach them to the casing 1.
The shielding must be clamped onto the casing sufficiently tightly to create a good contact.
- types of clamp : stainless steel.
6 - Shielded cable for connecting the motor, with shielding connected to ground at both ends.
This shielding must be unbroken, and if there are intermediate terminals, they must be in EMC
shielded metal boxes.
7 - Shielded cable for connecting the control.
For applications which require a large number of conductors, small cross-sections must be used
(0.5 mm
2
).
The shielding must be connected to ground at both ends. This shielding must be unbroken, and if
there are intermediate terminals, they must be in EMC shielded metal boxes.
8 - Shielded cable for connecting the braking resistor, if used. The shielding must be connected to
ground at both ends. This shielding must be unbroken, and if there are intermediate terminals, they
must be in EMC shielded metal boxes.
9 - Ground screw for the motor cable with low ratings, as the screw on the heatsink is inaccessible.
Note :
• If an additional input filter is used, it is mounted on the speed controller, and connected directly to the
line supply by an unshielded cable. Connection 3 on the speed controller is then made using the filter
output cable.
• Although there is an HF equipotential ground connection between the speed controller, the motor and
the cable shielding, it is still necessary to connect the PE protective conductors (green-yellow) to the
appropriate terminals on each of the devices.
