Interfaces
The central communication unit has three interfaces to communicate between unit and
user, and the interface or connection for the KNX bus.
The "PC" interface is intended to directly connect a central communication unit to a
local operator station. A USB cable, type A-B, is required to this end.
PC
The "Modem" interface is intended to connect a modem via RS-232. When communi-
cating via modem, the following message recipients are supported: Operator stations
(PC/laptop with ACS software), SMS recipients, pagers, fax machines.
Modem
The interface labeled "Ethernet" corresponds to a RJ45 plug on the Ethernet card
OZZ7E5. Order the card separately and insert in the central communication unit. A
network cable Cat-5 is required to connect to the Ethernet (Ethernet category 5 cable).
Ethernet
The"KNX" labeled connection terminals CE+ and CE- are intended for the KNX bus.
For more information on the KNX bus, see data sheet N3127.
KNX
We speak of parallel operation if one central communication unit is operated with two or
multiple operator stations. Also, e.g. with one operator station via USB, and/or via
modem, and/or via Ethernet.
Parallel operation
Operation
Communication connections for local operation (USB), and for remote operation via
modem and Ethernet.
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Building Technologies
Central communication unit OZW775 V2.0
CE1N5663en
HVAC Products
29.10.2008
