Alarm control apparatus; Analogue circuits; Analogue control apparatus; Analogue converters; Analogue output modules; Analogue slave modules; Apparatus and instruments for controlling electricity; Apparatus and instruments for switching electricity; Apparatus designed to monitor the performance of apparatus; Apparatus for climatic technology; Apparatus for checking boiler efficiency; Apparatus for controlling the operation of machines (electric); Automatic access control apparatus; Automatic access control systems; Automatic emergency reporting devices; Bus interfaces; Cellular telecommunications apparatus; Cellular telecommunications instruments; Communication interface units; Communications electronics for computers; Computer based control apparatus for assembly lines; Computer input instruments; Computer programs for use in computer aided engineering; Computer programs for use in telecommunications; Computer programs relating to local area networks; Computer software for time control; Connecting devices for data collection; Control apparatus for electric indoor light installations; Control devices (thermostats) for heating installations; Control panels for electronic supervision; Controller interface modules; Data carriers bearing machine readable data; Digital controllers; Digital electrical gauges adapted for use in controlling air pressure; Digital slave modules; Electric apparatus for commutation; Electrical apparatus for data acquisition; Electrical controls; Electronic apparatus for data processing; Electronic apparatus for developing communication links; Electronic apparatus for monitoring machines; Electronic control apparatus for automatic machines; Electronic control apparatus for electric motors; Electronic control apparatus for valves; Electronic control systems; Electronic digital automation installations for measuring building services installations; Electronic digital building automation systems; Electronic digital controllers for controlling digital flow control valves; Electronic digital switching apparatus; Electric apparatus for controlling; Electric apparatus for controlling the operations of machines