World News

Industry news and insights from Europe and around the World

UK News

Latest news and developments in the United Kingdom


Keep up-to-date with the latest new products and technology


General articles, applications and industry analysis

RDM adds Bluetooth wireless mesh control

UK: Resource Data Management (RDM) has introduced a new range of Bluetooth wireless networking modules for the building controls industry. 

Using Bluetooth Low Energy (BLE) technology, the modules transmit data between heating, ventilation, air conditioning and refrigeration, lighting and other building control equipment. The new Bluetooth range is designed for space-restricted areas or if building structure hinders the installation of cable solutions.

The range includes a two-input/output module, four input module, R232 interface for RDM controllers and a battery-operated temperature probe. All these devices connect to a central access point, that then links to RDM’s leading control system front-end DMTouch. Access point options include PoE, 5v and either DIN or ceiling mount options. 

The solution features mesh topology, a significant benefit compared to systems communicating point to point. In a mesh system signals can hop between available devices, bypassing obstacles and creating a more robust and reliable wireless infrastructure. The RDM solution allows for continuous data transmission between powered modules, as often as every 15 seconds.  

All of the new RDM Bluetooth modules are compatible with the DMTouch, RDM’s control system front-end when utilising the new Bluetooth access points. Up to four access points can be connected to one DMTouch, allowing for a wide range of coverage across large buildings and multiple floors. One DMTouch is said to be able to support a combined total of 64 Bluetooth devices, increasing the scope and flexibility of RDM’s extensive HVACR control network capabilities. 

For flexible installation options, two variants are available. One is designed for DIN rail mount while the other is intended for surface (wall or ceiling) mount. Both can be powered with a 5V power supply, while the surface mount variant supports the option of PoE.

Input/output modules 

The Bluetooth range includes two input/output (I/O) modules. One module features four inputs, while the other one features two inputs and two outputs. Both modules can be used to extend or improve the Bluetooth Mesh network resilience, without being used for I/O.

All inputs can connect to a mix of resistive temperature sensors. Each has their own over and under temperature alarm thresholds, associated alarm delay and temperature offset option. Alternatively, they can be used as digital on/off volt free inputs, for example, when monitoring plant faults. If monitoring refrigeration equipment, the inputs can also be used to prevent alarms when on defrost mode by mixing temperature inputs and volt free defrost signals. 

The two relay outputs are controlled via the DMTouch using either a GP Timer Channel or a TDB programmable logic control program. They are volt-free in operation and provide both N/C and N/O contacts.

RS232 to Bluetooth interface

This module connects to any RDM RS232 controller equipped with Bluetooth solution and provides wireless communication with the DMTouch via the Bluetooth network. The controller will appear as a device on the DMTouch with similar capabilities to RDM’s standard IP connections.

Bluetooth temperature probe

The probe transmits temperature readings to a DMTouch every 10 minutes, going to sleep between transmissions to conserve battery life.  In the event of a connection loss the probe will log data at 10-minute intervals for up to a week.  Transmitting the data when a connection to DMTouch is restored.  

A mobile app for Android and iOS, allows for a temperature offset to be adjusted for calibration purposes. Programming and a battery voltage check can also be carried out via the mobile app. A user replaceable battery further simplifies maintenance of the battery temperature probe.


Latest News

1st March 2024

Heat pump grant requests up 39%

UK: Applications for the UK’s boiler upgrade scheme in January were up 39% on January 2023, according to figures from the Department for Energy Security and Net Zero.
1st March 2024

Bitzer to launch new hydrocarbon compressors

GERMANY: Bitzer is to expand its range of compressors with new models for use with hydrocarbon refrigerants.
29th February 2024

BESA backing for WorldSkills UK

UK:The Building Engineering Services Association (BESA) is organising the refrigeration and air conditioning (RAC) category of the WorldSkills UK competition.
29th February 2024

Beijer Ref to acquire Australian firm QAE

SWEDEN/AUSTRALIA: Beijer Ref will expand its position in the Australian market with the agreement to acquire 60% of the shares in Sydney-based Quality Air Equipment (QAE).
29th February 2024

Chemours places CEO on administrative leave

USA: Chemours has placed its president and CEO Mark Newman, CFO Jonathan Lock and principal accounting officer Camela Wisel on administrative leave pending the completion of an internal review.
28th February 2024

Seeley to boost production in US export push

AUSTRALIA: Evaporative cooling equipment manufacturer Seeley International is to upgrade and expand its manufacturing plant in Lonsdale, South Australia, to boost exports to the USA.