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1.1 Wireless monitoring devices
For the retrofi t of food refrigeration and room cooling systems, energy
consumption measurement and I/O management via supervisor, CAREL
proposes the rTM SE wireless system (Remote Temperature Monitoring). This
solution guarantees the maximum in terms of:
•
Flexibility;
•
Functions;
•
Reliability;
•
Easy operation
•
Reduced installation costs;
•
Easy commissioning/service;
•
Integration with the most common BMS (Building Management Systems);
This solution ensures considerable savings in terms of installation costs
(eliminating the cost of wiring), off ering fl exibility in the layout of supermarkets
and allowing faster retrofi t installation. Ideal for all installations where electrical
wires cannot be laid, i.e. properties that do not have raised fl oors or false
ceilings.
The retrofi t of existing systems is required for compliance with HACCP
standards, for monitoring the systems via remote connections, for
recording events and analysing them for scheduled maintenance.
The CAREL rTM SE system can be used in all industrial and trade businesses
that require the prevention of risks relating to the safety and storage of food
for human consumption, in accordance with the HACCP standards; moreover,
it off ers the possibility to manage fl exible spaces very simply, thus reorganising
the layout of showcases in a supermarket without having an impact on the
wired network (communication and power supply);
The system is a network of wireless sensors fi tted inside the showcases, easy
to confi gure and install, connected to a Carel supervisor (PlantVisorPRO or
PlantWatchPRO) for recording the temperature, events and alarm notifi cations.
The data measured and the alarms signalled are saved and can be accessed at
any time, in compliance with EN 12830.
The system can be easily installed on all types of refrigeration unit (showcases or
cold rooms), is independent of the controller installed on the unit and requires
no additional wiring because the devices are wireless and battery powered,
meaning signifi cant cost savings.
The sensors require no electrical connections as they use a long life battery
(typically 5 to 8 years, depending on the transmission frequency set), a wireless
connection with ZigBee™ technology (mesh) at a transmission frequency of
2.4 GHz authorised for operation in all countries around the world, and are
ready for connection to the most common BMS systems using Modbus®
protocol. The sensors monitor the inputs (temperature, humidity, light and
digital input status) and send the data wirelessly to the Access Point or Router.
Communication between sensors and the Access Point is two way. The
sensors, as well as sending the change in the status of the variables, can also
receive data.
Moreover, a mains powered model has been designed for use in all
applications that require frequent communication (e.g. monitoring fl oating
suction pressure).
In ambient monitoring applications,
intensity can all be recorded by simply installing battery powered sensors in
the desired location. The sensors cover a wide range of uses in refrigeration,
air-conditioning and humidifi cation applications.
Many applications are also available for remote I/O management from
, as the module manages generic I/Os and saves on the cost of
supervisors
laying cables, without the need for separate power and signal cables.
The wireless devices send the temperature and alarm data wirelessly to the
Router and Access Point, which relay the information to the supervisory system
1. INTRODUCTION
the temperature, humidity and light
The CAREL rTM SE system consists of the following components:
•
Battery powered devices:
-
Temperature sensor from fi tted inside the showcase,
in Probe);
-
Sensor with two external NTC probes and two digital inputs,
SE
(External Probe) for showcases and cold rooms;
-
Room temperature and humidity sensor for installation in residential
environments,
version SA
-
Temperature, humidity and light sensor, SI industrial version;
-
Pulse counter to be used with the energy meter module confi gured for
pulse counters,
version CI;
•
Access Point. Wireless receiver that acquires data from the various sensors
in the ZigBee™ network, making such data available to the supervisor via
Modbus® RTU over RS485. Up to 30 sensors can be directly associated with
each Access Point, or a maximum of 60 if one or more Routers are used. The
supervisor (PlantVisorPRO or PlantWatchPRO) can thus see all the variables
in the rTM SE system;
•
Router. To be used when the distance between the Sensors and the
Router exceeds 30 m (relays the wireless signals so as to cover greater
distances between the Access Point and sensors), or if there are more
than 30 Sensors in the network. There can be a maximum of 60 Routers in
the wireless network, 48 of which are visible to the supervisor. The Access
Point automatically assigns a serial address in the order in which these are
"bound", starting from 200 up to 247. Five versions of Router are available,
which also include other functions:
-
Router powered at 230 Vac mains voltage, version RO;
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Router Bridge powered at 12-24 Vac, version RB. Integrates the function
to extend the RS485 network;
-
Router Sensor powered at 12-24 Vac, version EP1. Integrates the functions
of the battery powered EP SE Sensor);
-
Router-Actuator powered at 12-24 Vac, version RA. Integrates the
functions of I/O module or local thermostat;
-
Router-Pulse Counter powered at 12-24 Vac, version RC. Integrates the
same functions as the CI battery powered pulse counter;
•
Modbus® supervisor system: The rTM SE system is designed to be used
together with Carel PlantVisor PRO or PlantWatch PRO supervisors
Wireless transmission between the various devices uses standard ZigBee™
communication protocol and encryption technology with a Carel private key.
This is an advanced system that has achieved an excellent level of security in
data exchange for wireless communication and is used in many applications.
The CAREL solution uses mesh technology between Access Points and
Routers, ensuring more reliable communication and delivery of the data sent
by the sensor.
Note: ZigBee wireless connection without interoperability.
rTM SE handheld: network analyser used to check the ZigBee wireless signal
level and to open/close the wireless network when binding the devices
(sensors and Routers), including the possibility to set the BP Sensor address
and reset the Router and Access Point. Useful during installation;
7
"Wireless probes" +0300030EN - rel. 1.0 - 16.07.2010
ENG
version BP SE
(Built-
version EP
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