AlphaRex D21, digital weekly timer, series installation, 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 second, switching step 1 second. Power reserve 5 years for date and time. EEPROM memory to save the switching programs. Additional convenience functions: holiday program, random program, cycle function, operating hours counter, PIN code input lock, 1-hour 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: | 120 V |
| Power reserve in years: | 5 |
| Weekly program: | yes |
| Annual program: | yes |
| Mounting type: | DIN rail |
| Type of supply voltage: | AC |
| 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: | no |
| External button input: | no |
| 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 |
