Electrical and digital building infrastructure specialist Legrand’s new generation of programmable time switch technology encompasses AlphaRex³ and MicroRex time switches for precise temperature control in domestic, commercial and industrial environments.
“Legrand’s Rex time switches, with analogue and digital dials, are ideally suited to original-equipment manufacturers and panel builders, who can preprogramme the time switch during installation. At a later stage, when the panel or product is connected to power, all the end-user has to do is set the real time. These programmable time switches ensure high clock precision, optimum reliability, maximum safety and enhanced aesthetics,” says Legrand technical and solutions manager Marius Labuschagne.
“In temperature control applications, these time switches are used to switch an electric circuit on or off at selected times during a preprogrammed time period. These devices also have an automatic return facility and a permanent forced switching on or off override control,” he notes.
AlphaRex³ programmable time switches have a user-friendly standardised text-guided programming facility, with a high resolution digital display and backlight. There is a standard, single data key for all devices in this range to allow quick and easy transfer of programmes to other time switches and for creating backup copies.
These time switches are available with standard and multiple functions, with a daily or weekly programme facility and a clock working reserve of six years.
Programming with precision to the second is controlled directly on the time switch, or outside the distribution board using a personal computer and Legrand’s Alpha-Soft programming software. Other features include an EEPROM memory – a read-only memory in which content can be erased and reprogrammed using a pulsed voltage, which prevents settings being lost, and the facility to programme the clock prior to despatch. Once the unit has been programmed, the information will remain installed even if the switch is not connected to power. The battery can be removed without having to uninstall the time switch from the distribution board.
MicroRex time switches offer simple plug-and-play installation for daily and weekly programming. By simply setting the analogue switching dial during start-up, the time is automatically set using the fast-run mode. In the event of a power failure, the time is automatically reset.
These units have the capability to run multiple programmes, which ensures optimum time setting flexibility. MicroRex time switches have a light emitting diode status indicator, a precision clockwork of 0.2 seconds a day and are controlled by either a quartz or synchronous motor. For increased safety and user convenience, there is an automatic and manual and advance/override facility.
An analogue defrost switch is available for short periods of controlled defrosting. The timer can repeat one or two settable short programmes within 24 hours and the defrosting time is from one minute to 60 minutes for every contact.
This range is available nationally from Legrand’s distributor network and a technical advisory and backup service is also offered.