Skip to Main Content



Control. Accuracy. Compatibility. Take control of your time with a complete AllSync IQ Wired Clock System!
  • Type: Master Clock Controller
  • Product Series: AllSync Plus
  • Wattage: 0 watt
  • Circuits: Clocks & Bells Circuits
  • Sync Option: Ethernet
This replaces the following model numbers: LTR-512, MC4181LV


Product Specs

The American Time AllSync IQ® Wired Clock System and Master Clock provide accurate, synchronized time and reliable quality for any business, organization or school. Streamline the management of wired clocks, bells, lights, and door locks into one system; replace a failing wired Master Clock; or install a new wired clock system. Save time and money with this flexible clock technology!

  • Accurate to ±1 second to Master Clock
  • Automatic time synchronization via Ethernet
  • Easy installation with color-coded Molex plug
  • Easily manage all clocks from a web interface
  • Control up to six programmable circuits
  • Synchronize clocks with bell signals and electrical circuits (such as door locks or lights)
  • Automatic updates for daylight saving time (where applicable)
  • AllSync Wired Master Clock features include:
    • Ethernet time synchronization
    • Available with one clock circuit and up to 6 programmable circuits
    • 99 schedules-9999 events plus a temporary schedule feature
    • Automatic Daylight Saving Time and Leap Year correction
    • Password security
    • Included battery keeps time without external power and retains programmed data
    • Manual control of signal circuits
    • Quartz crystal time base is accurate to ±1 minute/year
    • Impact-resistant polycarbonate enclosure
Sign up to get the latest news, product information, and exclusive promotions delivered to your inbox.