DencoHappel ZGF.1E series Operation Manual page 91

Flex-Geko Fan Coil Unit
6.8.3 Topologies of network MATRIX.Net
6.8.4 Line structure
1 2
4-wire
PR-2011-0115-GB • Subject to modifications • R4-12/2015
The MATRIX.Net can be set in a line structure and a line structure with
branch feeder. All units equipped with DencoHappel MATRIX system can
access this data bus. The data bus must be terminated at both physical ends to
avoid reflections which can interfere with data transfer. Switchable bus terminat-
ing resistors are integrated on the respective boards enabling safe termination –
refer to Chapter "Connecting MATRIX.Net".
The illustration shows the setup of the MATRIX.Net with line structure. As an
example, two groups, each consisting of a control panel and a global module, are
networked. In addition, the power supply of the control panel via the controller
(terminal 95/99) is also presented.
2-wire
Fig. 6-40: Set up of MATRIX.Net in line structure
NOTICE!
The data transfer cable must be run as demonstrated in Fig. 6-40 so that only
one side of the respective shielding is applied – see "Shielding / Earthing" on
page 94..
Group 1
2-wire
Safety and User Instructions
Group 2
4-wire
91