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Building Technologies
Network Node WTT16…, WTX16…
CE1N2874en
HVAC Products
14.07.2005
Functions
•
Reception and storage of the data transmitted by the Siemeca™ AMR consumption
meters
•
Automatic creation of a network with up to 12 WT…16 (with a maximum of 500 con-
sumption meters)
•
Passing on all relevant consumption values to all WT…16 on the network
•
Communication via the Siemeca™ gateway
•
Communication with the OZW10 M-bus central unit
Network node versions
The WT…16… network node is a component of the Siemeca™ system and has been
designed for exclusive use with that system.
It is available in a number of versions for different applications:
Application Battery-powered
Mains-powered
Standard
WTT16 WTX16
With RS-232 interface for local data readout
WTT16.232 WTX16.232
Network nodes with integrated gateway are used for the remote readout of Siemeca™
AMR networks. They are described in data sheet N2878.
Combinations
All network nodes with integrated gateway can be used along with any other network
node. The maximum number of 12 network nodes in one system must not be ex-
ceeded.
The network nodes with gateway and integrated M-Bus master (WTX16.GSM and
WTX16.IP) are able to read M-Bus meters according to EN1434/3.
Technical design
The network node consists of the following subassemblies:
tr
ans
ceiv
er for
Siem
ec
a™
network
memory for
500 meters
M-Bus
(Slave)
RS232
(optional)
backup battery
power supply:
mains supply WTX16..
battery WTT16...
Receiver and transmitter are used for re-
ceiving consumption data and forwarding
them to other network nodes of the network.
The memory stores the consumption data. It
is protected against temporary power drops
(e.g. mains power failure or replacement of
the main battery) by a backup battery. The
network can be read locally via the M-Bus
interface. The network nodes WT…16.232
have an additional RS232 interface for rea-
dout purposes.
WTT16… nodes are battery-operated, while WTX16… require a mains power supply
AC 100 V…230 V.
The network node consists of 2 major sections: The base and the housing with the
electronics. It is thus possible to mount the base prior to commissioning, enabling the
electrical installer to connect the WTX16 to the mains network. At the time of commis-
sioning, the electronics section is snapped on and the electrical connections are made.
Basic design
