Shielding And Cable Routing - Balluff BML-S1G0-B7-M5E-0-S284 Serie Betriebsanleitung

BML-S1G0-B/S7_ _-M5E_-_0-(SA26-)S284
Absolute Magnetically Coded Position Measuring System
4
Installation and connection (continued)
4.5

Shielding and cable routing

Defined ground!
The position measuring system and the control
cabinet must be at the same ground potential.
Shielding
To ensure electromagnetic compatibility (EMC), observe
the following:
– The cable shield must be grounded on the controller
side, i.e. connected to the protective earth conductor.
– When ducting the cable between the sensor, controller,
and power supply, it is important to avoid going near
high voltage cables due to interferences.
Stray noise from AC harmonics (e.g. from phase angle
controls or frequency converters) are especially critical
and the cable shield offers very little protection against
this.
Magnetic fields
The position measuring system is a magnetically coded
system.
It is important to maintain adequate distance between the
position measuring system and strong, external magnetic
fields (see page 11, external magnetic fields).
Cable routing
Do not route the cable between the position measuring
system, controller, and power supply near high voltage
cables (inductive stray noise is possible).
The cable must be routed tension-free.
Bending radius
For information on the permissible bending radius, see the
connector on page 32.
Cable length
Max. cable length 20 m. Longer cables may be used if
their construction, shielding and routing prevent noise
interference.
Observe voltage drop in cable!
The cable has a resistance of approx.
0.4 Ohm/m (back and forth). The nominal voltage
on the BML must not be undercut (see Tab. 10-1
on page 32).
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