Siemens – 7LS1004 – Synchronous Time Switch T55, 230 V AC, 16 A, Day Timer

Main Features

• Manufacturer: Siemens – part of the 7LS series synchronous switch range  

• Model/MPN: 7LS1004 T55

• Function: Mains-powered synchronous time-switch, designed for daily ON/OFF control cycles  

• Voltage & Current Rating: 230 V AC, 50 Hz; switching capacity up to 16 A  

• Contact Configuration: Single changeover (1 NO or 1 CO) output mechanism  

• Time Resolution: 1 single daily switching cycle (1 S) – ideal for basic day-to-day automation tasks  

• Mounting Style: Built for panel/flush mounting with a 55 mm insertion depth, T55 format  

• Typical Applications:

  • Lighting or HVAC daily scheduling

  • Equipment that operates on one ON/OFF cycle per day

  • Building automation requiring simple repeatable schedules