User Manual

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Building Technologies M-bus System CE1P5361en
HVAC Products 4 Interconnected systems with zone controllers 08.02.2007
4 Interconnected systems with zone
controllers
4.1 Introduction
The functionality of a standard controller is not sufficient to cover the requirements of
complex plant. For this reason, several controllers can be interconnected.
For detailed information about interconnected systems, refer to the following pieces of
documentation:
Title Type of document Document
LPB – Basic System Data Data Sheet N2030
LPB – Basic Engineering Data Data Sheet N2032
LPB – System Engineering Basic Documentation P2370
4.2 Use
Interconnected systems are used in terraced houses, multifamily houses with substa-
tions, or hotels with attached buildings, where the functionality of a standard controller
is not sufficient to meet the requirements.
In that case, an RVD… primary controller is connected via LPB (Local Process Bus) to
a maximum of 40 other controllers that control heat consumption. For remote operation
and monitoring of these controllers via the M-bus system, the RVD2… can also be
used.
4.3 Functions
Data exchange between the various controllers takes place via LPB. The LPB is the
basis for the following functions:
 Plant extensions with zone controllers
 Transmission of heat demand signals
 Common use of an outside sensor for several controllers
 Use of common sensor data (e.g. common flow temperature sensor)
 Transmission of forced and locking signals for DHW heating
 Influencing the output
 Transmission of fault messages received from the zone controllers