Burkert 8681 - AS Interface Connection Options

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AS Interface - Design
12.2 Electrical connection options for AS interface
The following connection concepts are available for the electrical connection of the control head:
Cable gland with multi-pole connection
(M12plugaccordingtoIEC61076-2-101,4-pole),
cable length approx. 15 cm
Cable gland with multi-pole connection
(M12plugaccordingtoIEC61076-2-101,4-pole),
cable length approx. 80 cm
Connection left: AS interface
Connection right: external initiator
Connection left: AS interface
Connection right: external initiator
Fig. 21: AS interface connection concepts
12.3 Number of connectable control heads
The level of expansion that is actually possible depends on the total number of all individual operating currents
foreachcontrolhead,whicharesuppliedviathebusatthecommonASinterfacebussegment(seechapter
“12.6Designaid”).
Standard: AS interface/62 slaves
(ASinterfaceversionwithextendedaddressingrange(A/Bslave))
InASinterfaceversionswithextendedaddressingrange(A/Bslave),1mastercancommunicatewith62
slaves.
Option: AS interface/31 slaves
(ASinterfaceversionwith31slaveaddressingrange)
Inthiscase,amaximumof31controlheadscanbeconnectedtoabusline(addressrangerestriction).
12.4 Maximum length of the bus line
The bus cable may be a maximum of 100 m long. All AS interface lines of an AS interface string must be con-
sidered for the design, i.e. even the drop lines to the individual slaves and the cabling inside the control head.
When designing the system, the calculated line length of the cable at the control head must be either 0.3
or 1 m
(seethefollowing„Table1“).Thistakesintoaccounttheouterandinnercablelengths(seealsothe
followingexamplecalculation).
english
Control Head Type 8681