Overview#

The “mini” master clock is a device used to controll small-scale system of unified time, with up to 35 pieces of slave clocks and up to 8 pieces of school bells (signalling devices).

The clock is mounted to DIN rail (6M) and is finding its use mostly in schools and plants of reduced size.

Basic Properties#

  • LCD display with 2x16 characters.

  • Easy operations using 6 buttons located on the front panel.

  • Well-arranged user-friendly menu.

  • Multi language support.

  • Monitoring quality of GPS signal.

  • Possibility of configuration for any time zone.

  • USB connector for connection of Flash memory drive with saved switching programs.

  • Powered by mains 115 or 230 VAC or by DC power 12 or 24 VDC.

  • Striking function.

Time-Base#

  • The clock is controlled by a microprocessor and locked to its own precise quartz time base.

  • Local time calculation with automatic DST: entry of desired time zone from time zone table.

Slave Line#

1 slave line (24 V) with total load of 250 mA, freely adjustable for the transmission of:

  • MOBALine.

  • Polarized minute impulses (12 / 24 V, bipolar / unipolar).

  • Polarized half-minute impulses (12 / 24 V, bipolar / unipolar).

  • Polarized second impulses (12 / 24 V, bipolar / unipolar).

  • MOBATIME serial code.

The impulse length, gap length and cycle type can be set for all types of impulse lines.

Switching Channels#

  • Weekly program cycle with up to 399 programmable lines.

  • Astronomical calendar with sunrise and sunset calculation based on entry of geographical coordinates.

  • Manual switching with various modes (ON / OFF, push-buttons, timer).

Operation Reserve#

Passive#

  • Internal backup battery for RTC in case of power loss.

    • As soon as the power becomes resumed, the slave clocks adjust automatically and in an accelerated mode to the proper time, the channel stat corresponds to the actual time.

Active#

  • Internal circuit for chargind the accumulators.

  • Optional external maintenance-free lead-acid batteries.

  • Energy saving mode to save the back-up battery.

Other I/O#

  • Input for connection of GPS receiver (with DCF output).

  • Output 24 VDC with adjustable current limit to 200 mA (for powering of bells or other devices), can serve as 24 VDC power input alternatively.

  • Terminal for connection of external backup battery with adjustable current limit.

  • GPIO with striking (up to two tones) and carillon (up to four tones, on request) functions.

Daylight Saving Time Processing#

  • By setting the time zone when synchronizing from GPS.

  • Respecting time zone settings.