ProMinent DULCO flex Control Original Operating Instructions page 50

Supplementary operating instructions for PROFIBUS
Tab. 31: Data transmission rate and length of the bus cabling
Data transmission rate
kBit/s
12000
6000
3000
1500
500
187.5
93.75
19.2
9.6
Note for achieving IP 65 degree of
protection
50
®
Using shielding which is earthed at one end pre‐
vents low-frequency ground loops. Shielding
earthed at one end is not effective in countering
HF magnetic pick-up. Shielding earthed at both
ends as well as twisted conductors are effective in
countering magnetic HF pick-up but are not effec‐
tive against electrical HF pick-up.
We would recommend establishing a bilateral, low-inductance (i.e.
large area and low-impedance) connection with the protective
earth with PROFIBUS ® .
The overall length of the bus cabling without repeaters varies
according to the desired data transmission rate:
Maximum length of bus cabling
m
100
100
100
200
400
1000
1200
1200
1200
The PROFIBUS module has two M12 industrial sockets for con‐
®
necting with the PROFIBUS
with the PROFIBUS ® standard - see below - which means that
commercially available bus plugs may be used. Please note that
cable connections made with these plugs generally only meet the
requirements for protection against contact and moisture according
to IP 20!
But:
Installation in accordance with IP 65 protection against contact and
moisture is possible, since the M12 industrial socket of the PRO‐
FIBUS module allows it. But the PROFIBUS
®
provided with IP 65 class M12 industrial connectors.
® cable. The pin configuration complies
cable must then be
®