The Schneider Electric MTN6606-0008 is an 8-channel KNX year time switch (REG-K/8/800) with 800 switching memory locations. It drives lighting, HVAC, shutters, and scenes on a weekly, calendar, and astronomical basis, and can synchronise date and time to other KNX devices on the bus.

Programming is via the backlit text display on the device or from a PC. An astronomical program calculates sunrise/sunset from geographic position; DCF or GPS antennas provide atomic-clock accuracy. An 8-year lithium battery retains clock and programs during mains loss. Power the line with MTN684064 or MTN6513-1202; trigger loads via MTN6700 actuators.

Key Features — Year Time Switch with Astro

Scheduling

• Channels: 8 independent switching channels.
• Memory: 800 switching points — holiday, random, impulse, and cycle programs.
• Astronomical: Sunrise/sunset switching from location data (GPS refines position).
• Synchronisation: Bus-wide date/time broadcast; DCF/GPS antenna inputs.
• Security: PIN protection against unauthorised manual changes.

Operation and Backup

• Display: Backlit text-oriented front panel for local programming.
• Memory card: Copy programs between devices (accessory).
• Battery backup: 8-year reserve for clock and schedules.
• Operating-hours counter: Built-in runtime logging per channel.
• Shortest switch time: 1 second.

At a Glance

Specification	Detail
Order code	MTN6606-0008
Channels	8
Memory locations	800
Mains supply	110–240 V AC
KNX bus	24 V DC (bus-powered communication)

Full electrical and mechanical data are under Technical Specifications. Official Schneider documentation is under Downloads.

Applications and KNX Integration

• Building schedules: Office lighting and HVAC pre-start via MTN6700-0116 heating channels.
• Outdoor lighting: Astronomical switching for facade and car-park luminaires.
• Holiday mode: Absence simulation with random programs and MTN6300 presence override.
• Multi-line sites: One time switch per area; couple lines with MTN6500-0101.
• BMS logic: Complement bus schedules with LSS100200 for complex calendar rules.

Choosing a KNX Time Switch

Use MTN6606-0008 when you need 8 channels, 800 memory points, astronomical switching, and GPS/DCF sync on one DIN-rail unit. Ensure the KNX line PSU is sized for the time switch bus current plus field devices.