25
EN
Physical bus topology
Hi-O Technology
™ can be implemented in a star or linear topology. A ring
topology is not permitted.
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
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.
Star or linear
topology
Remote interface
Installation – Topology
