Sangamo Astro Zone 2 4-Pin Time Switch - 2 On/Off Operations

The Sangamo Astro Zone 2 is a 24-hour programmable time switch with two independent on/off operations per day, rated at 20A and designed for DIN rail mounting via a 4-pin base. The unit combines astronomical timekeeping with zone-based switching, allowing circuits to be controlled according to sunrise and sunset times or set clock schedules.

Designed for commercial, industrial and residential installations requiring automatic control of lighting, heating or ventilation circuits, the Zone 2 designation indicates the unit can control two separate zones or circuits independently. The 4-pin base clips onto standard 35mm DIN rail and provides both power supply and switching connections, simplifying panel installation. The 20A rating handles loads up to 4,600W on 230V mains, suitable for multiple lighting circuits or individual heating elements.

The 100-hour battery reserve maintains programmed schedules during mains power outages, preventing the need to reprogram the unit after supply interruptions. The astronomical function calculates sunrise and sunset times based on geographic location entered during setup, automatically adjusting switching times throughout the year to match changing daylight hours. This makes the unit particularly suited to outdoor lighting control, security lighting and commercial premises where lighting needs to track natural light levels.

The clear dial face shows the 24-hour cycle with red hour markings and numbered intervals, and the central rotary control allows on/off times to be set using mechanical tabs. The dial rotates once per 24 hours, with the tabs triggering switches as they pass the fixed contact points. The unit dimensions of 104mm height, 83mm width and 134mm depth allow it to fit standard electrical enclosures alongside circuit breakers and contactors.

Product Specification Sheet

Product Manual

What does Zone 2 mean?

Zone 2 indicates the time switch can control two separate circuits or zones independently, each with its own pair of on/off switching events per 24-hour cycle. This allows two different lighting circuits or loads to be programmed separately on the same unit.

How does the astronomical function work?

The astronomical function calculates sunrise and sunset times based on geographic coordinates entered during initial setup. The unit automatically adjusts switching times throughout the year to track changing daylight hours, removing the need to manually reprogram seasonal lighting schedules.

What happens during a power cut?

The 100-hour battery reserve maintains the programmed schedule and current time during mains power interruptions. When power is restored the unit continues operating from the correct time position without needing to be reprogrammed.

What type of mounting does it require?

The unit mounts onto standard 35mm DIN rail via a 4-pin base. The base clips onto the rail and provides both power supply and switching connections, allowing the time switch to be installed in standard electrical enclosures alongside circuit breakers and contactors.