effeff ePED Hi-O Technology Bus Installationsanleitung Seite 25

Installation – Topology
Physical bus topology
Hi-O Technology™ can be implemented in a star or linear topology. A ring
Star or linear
topology is not permitted.
topology
Terminating resistor
The Hi-O Technology™ bus must be terminated with a terminating resistor. For this
purpose, many Hi-O Technology™ compatible devices can be factory-equipped
with a switchable terminating resistor (see instruction guide for the device to be
connected).
In normal door wiring, exactly one terminating resistor must be activated.
In a topology with remote interface, a terminating resistor must be activated at
Remote interface
each line end of the longer connection lead.
Running the lines together at a central distribution point, such as a distributor or
gateway, where the terminating resistor is activated, is a practical approach.
Cable lengths for Hi-O door wiring
The lengths of all lines within a Hi-O Technology™ system may not exceed 50 m.
The length of a branch connection line may not exceed 10 m.
(„Wiring examples", page 27)
Cable quality
In principle, any cable type can be used, having regard to local circumstances and
regulations. Special requirements apply for a remote interface („Bus addresses/
devices", page 26). The appropriate cable cross-section must be selected
depending on the cable length.
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EN