AUMA SAEx 07.2 User Manual

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For connecting cables exposed to UV radiation (outdoor installation), use UV
resistant cables.
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For the connection of position transmitters, screened cables must be used.
Cable installation in ac-
cordance with EMC
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.
Fieldbus cable
Table 17:
Cable recommendation
Only cables complying with the recommendations of EIA-485 specifications should be used for Modbus
wiring.
135 to 165 Ohm, at a measurement frequency between 3 and 20 MHzImpedance
< 30 pF per metreCable capacity
> 0.64 mmWire diameter
> 0.34 mm², corresponds to AWG 22Cross section
< 110 Ohm per kmLoop resistance
CU shielding braid or shielding braid and shielding foilScreening
Prior to installation, please note:
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Connect maximum 32 devices to one segment.
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If more devices are to be connected:
- Connect several segments using repeaters.
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Install fieldbus cables at a distance of minimum 20 cm to other cables.
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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).
Table 18: Transmission rate/cable length for line topology
Possible cable length with repeater
(total network cable length)
Max. cable length (segment length)
without repeater
Baud rate (kbit/s)
Approx. 10 km1,200 m9.6 – 115.2
Table 19: Transmission rate/cable length for loop topology
Max. possible cable length of redund-
ant loop
Max. cable length between actuators
(without repeater)
Baud rate (kbit/s)
Approx. 290 km1,200 m9.6 – 115.2
6.2. Overview of AUMA electrical connections
The section below provides an overview of the different electrical connections
described in the chapters to follow.
27
SAEx 07.2 – SAEx 16.2/SAREx 07.2 – SAREx 16.2 Control unit - electromechanical
ACExC 01.2 Intrusive Modbus RTU Electrical connection

AUMA SAEx 07.2 Specifications

General

Brand	AUMA
Model	SAEx 07.2
Category	Controller
Language	English