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• For a stable wireless communication and an optimal network structure (with minimal number of
components) it is neccessary to evaluate the site for defining the exact location of each transmitter,
router and antenna. The site evaluation shall take place before ordering the EE240 network
components. Please contact the E+E sales representative for details.
3.1.2
The Structure of the EE240 Wireless Sensor Network
Max. 10 RF connections each node
Max. 10 RF connections each node
Transmission range: up to 60 m within buildings / up to 1 000 m free field (without obstacles)
Fig. 1
Structure of EE240 wireless network
Each EE242 base station can communicate with max. 10 transmitters (EE244 or EE245) or routers
(EE244-R).
Each EE244-R router can communicate with max. 10 transmitters (EE244 or EE245) or routers (EE244-R).
The network is self-configuring and builds up in a star, tree, meshed or mixed topology.
3.2
Components of the EE240 Wireless Sensor Network
3.2.1
EE242 Base Station
The EE242 base station receives the measured data from all the transmitters and routers. It offers
following data outputs and interfaces:
• Modbus (ASCII, RTU, TCP)
• JSON
• Four analogue outputs
• Display (optional)
The EE242 base station features a web server, which facilitates the setup of the entire EE240 wireless
sensor network and the receving of the measured data.
For details see chapters 4.1 Base Station and 6 EE240 Network
3.2.2
EE244 and EE245 Transmitter
Each EE244 and EE245 transmitter communicates with the base station either directly or indirectly via
one or more routers. The transmitters can be powered ether by batteries or by an external supply unit,
see accessories in the EE240 data sheet.
For details see chapter 4.2 EE244 Transmitter/Router, EE245 Transmitter, Sensing Probes.
6
SENSING PROBES
TRANSMITTERS / ROUTERS
TRANSMITTERS / ROUTERS
BASE STATION
Configuration.
User Manual EE240 Wireless Sensor Network
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