SonNet System Standard system devices are used for the actual final installation,
and consist of the receiver, battery powered ‘end devices’ (EDs) and, if
required, permanently powered routers.
EDs achieve long battery life (5 years or more)
by taking measurements only at predefined intervals and transmitting
them to the receiver for processing.
Description
At all other times an ED is in an ultra-low power mode. EDs can measure
temperature and RH as well as offering momentary switch and setpoint
knob facilities.
Leaflet
Start guide
Manual
on request
Routers are ‘awake’ at all times to process data
from EDs and respond to commands from the receiver. Routers can also
have all the measurement features as an ED.
The receiver is the heart of the system and
processes all data from EDs and routers for integration into a BMS or
control system.
SonNet Parts
Battery Powered Sensors (EDs)
Sensor nodes are used in conjunction with the RF-RX20 or RF-RX40
receiver units, and if required (depending on installation topography),
RF-RR series of routers.
Data is transmitted back to the receiver at
configurable time intervals, or on a configurable change in measured
value.
Each sensor retains these configurations if the battery becomes
discharged or requires replacement. The sensors automatically find the
best path back to the receiver, which may be directly to the receiver or
via ‘parent’ routers.
Allmän
Information
Battery powered nodes are available in four
formats
Space mounting temperature, with setpoint and
momentary switch options
Space mounting RH&T, with setpoint and
momentary switch options
Plant mounting temperature
Plant mounting RH&T
Why wireless? Market Requirements
Increased need to report / improve energy
savings (Bldg Code)
High installed new installations cost with
legcy wired system
Emerging refurbishment market (Over 70% of
commercial space)
Flexibility requirement TECHNOLOGICAL
DEVELOPMENT WITH MIRCO-CONTROLLERS
Enabling technologies emerging
New low power RF standards (IEEE 802.15.4)
Lower cost micro controllers with embedded
radios
Maturing of battery technology PRODUCT
POSITIONING BEST INSTALLED COST
Less wiring on install
Lower engineering cost
Little planning required prior to install
Simple commissioning
THE STANDARD SYSTEM
The final system of devices permanently installed on site for the
purposes of monitoring and control.
THE CONTROL AND MONITOR SOFTEWARE
Free software used to configure devices on the wireless network and to
monitor the network topology.
The Radio Network A SonNet radio system
is comprised of a receiver, battery powered sensors and permanently
powered routers. Routers, though permanently powered, can also have
sensing elements, accomplishing both router and sensors functions.
Routers and sensors can either communicate
directly with the receiver or via other routers. Routers are required to
be permanently powered as they need to stay “awake” at all times to
allow signals from “child” nodes to be instantly forwarded to their
“parent” nodes.
Battery powered sensors only “wake” for very
short periods to send data. In the schematic above, routers R2 to R7
have 5 children each, all battery powered sensors. Their parent is the receiver.
Router R1 has 8 children and R8 has 4 children, giving a total number of network
devices of 51, including the receiver. The receiver can support a
maximum of 16 directly connected “child” devices, of which only 12 can
be battery powered nodes, plus up to 4 routers. Routers can support a
maximum of 16 directly connected “child” devices, of which only 8 can be
battery powered nodes, plus up to 8 routers.
There can be a maximum depth of 8 layers of
routers in a network and a maximum of 50 nodes per network with the
RF-RX series of receivers.
Note that battery powered devices can
only route their signals to the receiver directly or through routers,
and not through other battery powered devices.
How to use the SonNet Radio System
Install Configuration and Monitoring Software
(CMS)
Connect the PC and switch on the receiver
Start the CMS Software ... start the CMS
application by clicking the icon
Log on at administrator level
Mount all routers, sensors and the receiver (in accordance with the plan made using the Site Survey Kit. Note
the MAC address of each device)
Power up all 24V routers and battery sensor
nodes
Authorisation of the devices
View a list of all devices
Turn off Auto Commision Mode
Organise the devices in a graphical view
See a summary of a device to map a sensor parameter to a receiver
