Weekly time switch ASTRO Digital 230V 16A 2-channel 2TE time switch 7LF4 Astro for flexible switching or switching adapted to sunrise and sunset times. The digital time switch 7LF4 Astro from Siemens switches electrical consumers adapted to the local sunrise and sunset times or variably to certain switch-on and switch-off times accurate to the tenth of a second. The digital time switches from Siemens are characterized above all by: 1. Automatic calculation of the daily changing sunrise and sunset times. 2. Models tailored to requirements for different areas of application: 1-channel version with 56 and 2-channel version with 28 memory locations per channel. 3. User-friendly menu for on-site programming and convenient programming on the PC using a data key. 4. Secure data retention thanks to backup battery and PIN code lock. www.siemens.com/lowvoltage. Siemens offers a comprehensive portfolio of protection, switching, measuring and monitoring devices, distribution systems as well as switches and sockets for safe, efficient electrical infrastructure in buildings and industry.
| Property | Value |
| Width in modular units: | 2 |
| Number of channels: | 2 |
| Protection class (IP): | IP20 |
| Weekly program: | yes |
| Annual program: | yes |
| Voltage type of Supply voltage: | AC |
| Frequency of supply voltage: | 50 to 60 Hz |
| Accuracy per day: | 0.1 s |
| Text guidance in display: | yes |
| 24 h program: | yes |
| 60 min program: | yes |
| Automatic summer/winter time change: | yes |
| Shortest switching time channel 1: | 0.016666666 min |
| Holiday program: | yes |
| Pulse program: | yes |
| Cycle program: | yes |
| Astro program: | yes |
| External button input: | no |
| Random program: | yes |
| Operating hours counter: | yes |
| Mains synchronous: | yes |
| Quartz controlled: | no |
| Radio controlled: | no |
| Manual operation: | yes |
| Number of memory locations: | 28 |
| Circuit preselection: | yes |
| Nominal switching current at 250 V AC: | 16 A |
| Potential-free switching contact: | yes |
| Width: | 36 mm |
| Height: | 83 mm |
| Depth: | 70 mm |
