AlphaRex D21 astro, digital astro timer with control input, series installation, for switching lights and other electrical consumers on and off at dusk. Astro function can be combined with timer function. Offset for sunrise and sunset times adjustable via time offset +/-120 min. or angle offset +/-12°00. Control directly from the distribution board, no separate light catcher required. With text-guided programming concept. Programming accurate to the second. Simple program creation via PC using Legrand AlphaSoft and data key. Switching times visible as a weekly overview in the display. Programming by selecting day blocks or selecting preset blocks Mon-Sun, Mon-Fri or Sat-Sun. 56 programs. Shortest switching time 1 sec., switching step 1 sec. Power reserve 5 years for date and time. EEPROM memory for saving the switching programs. Additional convenience functions: holiday program, random program, cycle function, operating hour counter, PIN code input lock, 1h test, background lighting, automatic summer/winter time changeover, mains synchronous operation adjustable, manual switching, with zero-crossing switching. Switching output: 1 changeover contact 250 V/ 50 Hz, 16 A~ cos phi = 1
| Property | Value |
| Width in division units: | 2 |
| Number of channels: | 1 |
| Protection class (IP): | IP20 |
| Supply voltage: | 24 V |
| Power reserve in years: | 5 |
| Weekly program: | yes |
| Annual program: | yes |
| Mounting type: | DIN rail |
| Type of supply voltage: | AC/DC |
| Frequency of supply voltage: | 50 to 60 Hz |
| Accuracy per day: | 0.1 s |
| Text guidance in the display: | yes |
| 24 h program: | yes |
| 60 min program: | no |
| Automatic summer/winter time change: | yes |
| Shortest switching time channel 1: | 0.01666 min |
| Holiday program: | yes |
| Pulse program: | no |
| Cycle program: | yes |
| Astro program: | yes |
| External button input: | yes |
| Random program: | yes |
| Operating hours counter: | yes |
| Mains synchronous: | yes |
| Quartz controlled: | yes |
| Radio controlled: | no |
| Manual operation: | yes |
| Number of memory locations: | 56 |
| Switching preselection: | yes |
| Nominal switching current at 250 V AC: | 16 A |
| Potential-free switching contact: | yes |
| Width: | 35.6 mm |
| Height: | 83 mm |
| Depth: | 60 mm |
| External programming: | yes |
| Radio-controlled (DCF77): | no |
| GPS: | no |
| With memory card: | no |
