rulmeca RDR BL3, Technical Manual

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TECHNICAL MANUAL FOR THE RDR BL3 - V1.1 DRIVE ROLLER Rev. 21/09/2018 page 24
In order to avoid disturbed signals, hazardous voltage spikes for the electronic systems inside and outside the
Drive Roller, and electromagnetic interference (EMI), it is vital for the electrical system to be designed from the
outset in such a manner as to:
1. Separate the signal lines and 24VDC power lines to the Drive Rollers from VAC lines of motors or lines
coming from inverters or which are above the vents of servo drives and motors
2. Ground all the equipment on a single point, using a parallel ground system.
3. If necessary, take additional measures to filter noise and voltage spikes if the VDC supply is particularly
affected.
Correct routing of the cables and careful manufacture of the cables improve the system's electromagnetic
compatibility (EMC). To prepare and install the cables, take the following steps:
1. Keep the cables as short as possible.
2. Route the signal cables and 24VDC power cables far from cables carrying alternating current in general.
3. Never ground both the ends of the cables shield.
WARNING :
If the shielding of the VAC cables is not grounded, the shield could carry high voltage that is then passed
on to adjacent cables.
ALWAYS check that all the power cable shields are grounded.
Noncompliance with these safety measures could cause personal injury or damage the Drive Roller or conveyor.
The grounding structure and system must not only be correct but must also comply with the regulations in force in
the place of installation.
Make sure that the items travelling on the roller conveyor are free of static electricity.
In order to ensure that the electrostatic charges are dispersed that are created by the sliding of the belts
or of the package on the rollers, antistatic rollers must be used.
WARNING:
Rubberized features, insulating cladding, rings causing greater friction between the package and tube or
tapered plastic sleeves for bends insulate the package from the roller and prevent electrostatic charges
being grounded (even if the base roller is antistatic).
In such cases, it is the customer's responsibility to create alternative systems (with systems such as
brushes in direct contact) to disperse the electrostatic charges away from the conveyed package.