Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Communication 03.10.2011
28.2.6 Universal transmission and reception zones
The device RMU7x0B allows for the universal exchange of data via its own
terminals as well as via terminals for the extension module RMZ78x. The data is
exchanged via KNX bus from device to device.
 Universal inputs, digital and analog outputs can be used as send objects (to the
send zones).
 Universal inputs can be used as receiving objects (in the receiving zones).
 The data is exchanged as if the device terminals were hardwired.
A maximum of 32 transmission and reception zones each are permitted for each
line (for the KNX bus, see N3127, P3127).
"Allowed" and "not allowed" applications exist pursuant to the KNX bus
specifications (e.g. send frequency).
The use of universal transmission and reception zones is allowed and makes
sense for:
 Controlling decentralized aggregates such as motors, pumps, etc..
 Simple control functions that are not time-critical.
 Common follow-on processing or use of bus information.
The applications below or input/output variables cannot be implemented using
universal transmission and reception zones:
 Safety-relevant plants and facilities (e.g. fire alarm off, smoke extraction, frost
protection function).
 If a "simultaneous start behavior of plants" is requested.
 Applications where the loss of communications of transmission and reception
zones can cause damage.
 Controlled systems of a time sensitive or highly complex manner (e.g. speed
control via pressure, humidity).
 Main controlled variable that must be present.
 Recording and evaluating pulses.
After switching on the RMU7x0B (power-up), it may take some time before signals
from the bus are available. For not allowed applications of the transmission and
reception zone, this may result in a faulty plant behavior.
The desired transmission or reception zone must be set on a terminal on the
RMU7x0B to activate the function. The partner device must also be set in the same
manner.
The transmission/receiver procedure is a 1:n relationship, i.e. in a
transmission/reception zone, one transmitter, but multiple receivers are possible.
Function principle
Number of transmission /
reception zones
Note
Examples of allowed
applications
Examples of not allowed
applications
Note
Activation
Note