Shielding And Cable Routing - Balluff BTL5-T1 -M Série Manuel D'instructions

BTL5-T1 _ _ -M _ _ _ _ -A/B/Y/Z-S103
Transducer – Rod Style
4
Installation and connection (continued)
Magnet
(e.g. BTL-P-1028-15R)
Supporting rod made of non-magnetizable material
Fig. 4-8: Example 2, transducer installed with supporting rod
4.4

Shielding and cable routing

Defined ground!
The transducer and the control cabinet must be
at the same ground potential.
Shielding
To ensure electromagnetic compatibility (EMC), observe
the following:
– Connect transducer and controller using a shielded
cable.
Shielding: Braided copper shield with minimum 85%.
– Shield is internally connected to connector housing.
Magnetic fields
The position measuring system is a magnetostrictive
system.
It is important to maintain adequate distance between the
transducer/holding cylinder and strong, external magnetic
fields.
Cable routing
The Profibus bus line must be routed according to
Technical Guideline 2.111, Installation Guidelines for
PROFIBUS-DP/FMS.
When ducting the cable between the transducer, controller,
and power supply, it is important to avoid going near high
voltage cables due to interferences. Inductive stray noise
from AC harmonics (e.g. from phase angle controls) are
especially critical and the cable shield offers very little
protection against this.
The signal is transmitted to the controller via the
PROFIBUS DP interface.
Cable twisted in pairs, shielded.
Maximum length of the entire field bus cable: 1200 m
10 english
The transfer rate depends on the length of the cable. In
accordance with EN 50170, the values named in Tab. 4-2
apply.
Cable length
< 100 m
< 200 m
< 400 m
< 1000 m
< 1200 m
Tab. 4-2: Baud rate depending on cable length
The bus must be terminated at both ends in accordance
with EN 50170 (see Fig. 4-10).
The BTL5-T... can be assigned a station
address via DIP switches. In addition, the
BTL5-T... can internally terminate the bus via
DIP switches. For further information, see
Presettings on page 12.
Baud rate [kbit/s]
12000
1500
500
187.5
93.7/19.2/9.6