LEGRAND - MicroRex - 412812
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eBayLegrand 4128 12 Microrex T31 230V AC 50Hz mechanical Daily Time switch 24Hour
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Product Information
Full details
The LEGRAND MicroRex 412812 is a reliable analog daily timer designed for homeowners and professionals seeking automated control over 230V AC electrical circuits. This rail-mounted device is perfect for managing lighting, heating, or ventilation systems with precision, though users should note that it is limited to a 24-hour cycle and does not support digital programming or complex weekly scheduling.
All features
| Series | MicroRex |
|---|---|
| Model Part Number | 412812 |
| Brand | LEGRAND |
Extended Product Information
FAQs
Does this timer have a battery backup?
The MicroRex 412812 operates using mains frequency to keep time; if power is lost, the clock stops.
Can I use this for weekly programming?
No, the 412812 is strictly a 24-hour daily timer.
Is this device suitable for outdoor use?
Only if housed within an IP-rated weatherproof electrical enclosure.
What is the maximum current load it can handle?
It is rated for a maximum load of 16 Amps.
How do I install this on a rail?
The device features a standard rear-locking mechanism for clipping onto a 35mm DIN rail.
Troubleshooting
Timer is not switching the load.
Verify that the input power supply is active and that the manual override switch is set to the 'Auto' position.
The device is losing time synchronization.
Ensure the power connection is constant, as the timer relies on the mains supply for frequency-based timekeeping.
Mechanical gears appear stuck.
Check the programming dial for any debris and ensure the unit is mounted in an area free from vibration or extreme dust.
Pros and Cons
Pros
- Simple and intuitive analog operation
- Easy installation on standard DIN rails
- High current capacity of 16A
- Reliable daily repetition cycles
Cons
- Limited to 24-hour scheduling cycles
- Lacks digital screen or precise time-of-day feedback
- Not suitable for complex weekly or seasonal programs
Setup, Compatibility & Care
Installation should be performed by a qualified electrician to ensure safety, as the device operates at 230V AC. To set the timer, ensure the unit is correctly seated on a 35mm DIN rail and connected to the appropriate circuit phase and neutral terminals. For maintenance, keep the installation environment dry and free of excessive dust to prevent obstruction of the mechanical gears. Periodic checks are recommended to ensure the timing synchronization remains accurate against real-time clocks.