Bus cables
Only cables according to IEC 61158 and 61784 standards, cable type A,
may be used for Profibus DP wiring.
Cable recommendation:
Impedance:
135 to 165 Ohm, at a frequency
of 3 to 20 MHz.
Cable capacity:
< 30 pF per metre
Core diameter
> 0.64 mm
Core cross section:
> 0.34 mm², corresponds to AWG 22
Loop resistance:
< 110 Ohm per km
Screening:
Copper shielding braid or shielding braid and
shielding foil
Prior to installation, please note:
.
Connect maximum 32 devices to one segment.
.
If more devices are to be connected:
–
Allot devices to different segments.
–
Connect segments using repeaters.
.
Respect a distance of minimum 20 cm between the bus cable and other
cables.
.
If possible, bus cables should be laid in a separate, conductive, and
earthed cable tray.
.
Make sure to avoid potential differences between the individual devices
on the bus (perform a potential compensation)
18
Multi-turn actuator SAExC 07.1 – SAExC 16.1/SARExC 07.1 – SARExC 16.1 Non-Intrusive
with actuator controls AUMATIC ACExC 01.1 Profibus DP
Operation instructions
Data transmission rate
in kbit/s
£
93.75
187.5
500
1,500
Maximum segment length
in m
1,200
1,000
400
200
Table 3
