Overview Of Auma Electrical Connections - AUMA SQEx 05.2 Operating Instructions Manual

Electrical connection
Cable installation in ac-
cordance with EMC
Fieldbus cable
6.2.

Overview of AUMA electrical connections

24
SQEx 05.2 SQEx 14.2/SQREx 05.2
Signal and fieldbus cables are susceptible to interference. Motor cables are
interference sources.
Lay cables being susceptible to interference or sources of interference at the
highest possible distance from each other.
The interference immunity of signal and fieldbus cables increases if the cables
are laid close to the earth potential.
If possible, avoid laying long cables and make sure that they are installed in
areas being subject to low interference.
Avoid parallel paths with little cable distance of cables being either susceptible
to interference or interference sources.
Table 14:
Cable recommendation
Only cables complying with IEC 61158 or IEC 61784, cable type A, may be used for Profibus DP wiring.
Impedance
Cable capacity
Wire diameter
Cross section
Loop resistance
Screening
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.
Install fieldbus cables at a distance of minimum 20 cm to other cables.
If possible, fieldbus cables should be laid in a separate, conductive, and earthed
cable tray.
Ensure absence of equipotential earth bonding differences between the indi-
vidual devices at fieldbus (perform an equipotential earth bonding).
Baud rate [kbit/s]
Maximum segment length [m]
The section below provides an overview of the different electrical connections
described in the chapters to follow.
SQREx 14.2 Control unit: electronic (MWG)
ACExC 01.2 Non-Intrusive Profibus DP
135 to 165 Ohm, at a measurement frequency between 3 and 20 MHz
< 30 pF per metre
> 0.64 mm
> 0.34 mm², corresponds to AWG 22
< 110 Ohm per km
CU shielding braid or shielding braid and shielding foil
≥ 93.75
187.5
1,200 1,000
500 1,500
400 200