Operator Interfaces, Switches & Relays

Advanced programmable time switch technology

April 2019 Operator Interfaces, Switches & Relays

Legrand’s AlphaRex3 and MicroRex time switches are designed for easy programming and ensure high clock precision in industrial, commercial and domestic environments.

Based on advanced time switch technology, they are used to switch an electric circuit on or off at selected times during a pre-programmed time period.

The AlphaRex³ series has a user-friendly standardised text-guided programming facility, with a high resolution digital display and backlight. Programming with clock precision to the second is controlled using Legrand’s AlphaSoft programming software. Other features include an EEPROM memory, which prevents settings being lost. Typical applications for this series include industrial pump stations, security alarms, lighting, air conditioners, heating and ventilation systems.

MicroRex time switches offer easy plug and play installation for daily and weekly programming. By simply setting the analog switching dial during startup, the time is automatically set using the fast-run mode. In the event of a power failure, the time is automatically reset.

With analog and digital dials, there are 24 hour and seven-day time switches for DIN rail and wall mounting, with a five-year running reserve. These units have the capability for multiple programs, which ensures optimum time setting flexibility. MicroRex time switches have an LED status indicator, a precision clockwork of 0,2 s/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/over-ride facility. The MicroRex series is designed for use in applications, including periodic lubrication of machines or regularly repeated switching of pumps, feed conveyors and sprinkler systems.


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