MC3 Master Clock

The MC3 Master Clock is available in two versions, the MC3-X10 and MC3-MI. These control National Time’s Architectural Clock product line. The MC3-X10 control the MR Series synchronous driven clock movements which include the 2MR, 3MR, HMR etc. and will correct at 10 times (x10) speed either by a second motor or by utilizing National Time’s reversible motor transmission. The MC3-MI corrects the minute impulse type clocks like the 2MI, 3MI, HMI, etc. These clocks increment each minute and correct by advancing 1 minute every 10 seconds.

Benefits

  • Controls most Outdoor Clock Types

  • Synchronous or Impulse Clock Control

  • Long Life Solid-State Outputs

  • Large LED Display

  • Accurate 50/60Hz Timekeeping

  • Automatic Power Failure Correction

  • Daylight Savings Adjustments

  • GPS or LAN Time base Options

  • Wire Terminals Ease Installation Effort

  • UL Listed

  • Made in the U.S.A.

More Details


The MC3 Master Clock is available in two versions, the MC3-X10 and MC3-MI. These control National Time’s Architectural Clock product line. The MC3-X10 control the MR Series synchronous driven clock movements which include the 2MR, 3MR, HMR etc. and will correct at 10 times (x10) speed either by a second motor or by utilizing National Time’s reversible motor transmission. The MC3-MI corrects the minute impulse type clocks like the 2MI, 3MI, HMI, etc. These clocks increment each minute and correct by advancing 1 minute every 10 seconds.... Both MC3s come standard with three solid state 120VAC outputs to directly control clocks without the need for additional relays. These solid state outputs are capable of driving 3 amps each and incorporate zero-cross technology to handle undesirable current surges and inrush. The MC3 uses power-line frequency to keep accurate time eliminating the inaccuracies of crystal oscillators found in other products. In countries that do not regulate the power-line frequency or installations that frequently test backup power generators, the power-line frequency will not be an acceptable time base. For these installations, a minute impulse clock system should be used. The MC3 can be equipped with a Global Position Satellite (GPS) antenna (separately order MC3-GPS) to keep time with the National Institute of Standards and Technology (NIST) satellite time base. Also available is the MC3-LAN (separately order) that allows a connection to the local area network. With this connection, the MC3 can synchronize with any simple network time protocol (SNTP) time server. The MC3 series master clocks also automatically correct clocks after a power outage or daylight savings adjustment. The MC3’s battery-less backup design can keep time internally for over 150 days. For multiple clock installations, the MC3-4SW (ordered separately) 4 switch module provides individual clock control helpful during installation or when the clocks are being serviced. The clocks can be synchronized with each other to allow the MC3 to advance them to the correct time together.

Specifications and Related Literature


# Doc. Num. Name/Description File size View / Download
1 603 MC3-x10 Data Sheet 214 KB View

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