The rack mount version of the MC100 is a 3U standard 19" rack mount. The MC100-RM is a microprocessor based clock and auxiliary circuit controller capable of synchronizing both digital and analog secondary clocks. The MC100-RM provides automatic corrections for power outages as well as programmed events such as daylight savings. Powered by a 120VAC supply, the MC100-RM utilizes a 10 year lithium battery for backup during power outages. A user-selectable time base allows the master clock to either monitor the power-line frequency, internal crystal oscillator as well as an optional GPS or LAN interface to provide the most accurate time keeping.

The MC100-RM comes standard with four circuits which may be used as either clock circuits or auxiliary circuits for tones, bells, and other timed events. Each circuit has an indicating LED and an OFF/AUTO/RESET slide switch for ease of manual control. The rack mount MC100 may be expanded to up to 8 circuits with the addition of an EXP-4 circuit expander board.

Programming is easy utilizing a backlit 32 character liquid crystal display and a 16 button keypad. The multifunction keypad provides single button menu access allowing quick and easy time, schedule, and setup changes. Two level password security may be used to protect technician level settings and programmed events. The MC100-RM supports 20 program schedules with up to 200 program entries. Each event duration is programmable from 1 second to over 4 days. Attractive neutral Powder Gray finish with Night Blue graphic overlay complete with label pockets for custom circuit legends.

Accessories

EXP-4 Circuit Expansion Module. The EXP-4 circuit expander adds additional clock and auxiliary circuits to a standard MC100. Included are four slide switches, relay board with terminal block, and graphic overlay with label pocket. The rack mount MC100 may be expanded to up to 8 circuits with one EXP-4. The EXP-4 modules must be ordered with the MC100 since it may not be field upgraded.

WeM-MC100 Web-Enable Module. The WeM-MC100 module allows the MC100 to be synchronized to LAN or Internet time. Additionally, it upgrades the MC100 to a user-friendly web-based interface to create and edit program schedules and configure auxiliary devices and clocks. The MC100 can be configured, programmed, and monitored from any PC on the LAN network through a standard browser interface and a dedicated PC is not required during normal operation.

MC100-GPS Antenna. The MC100-GPS module enables the MC100 to receive accurate time information from up to 12 satellites. The GPS Antenna sends the number of satellites in view to the MC100 which is displayed on its LCD display. The communication between the MC100 and antenna is supervised and fault conditions are displayed. The standard outdoor mounting requires a 1” x 14 TPI pole (by others). The GPS antenna comes standard with a 30’ cable. Cable length may be extended to 100’ with 5 conductor shielded low capacitance cable.

PS-DRIVER-2/5A Power Supply Driver. The PS-DRIVER-2/5A output module provides general purpose solid state outputs to be used in conjunction with other National Time products to enhance the performance of the standard relay outputs. “Zero-Cross” turn on technology greatly reduces inrush currents and contact arcing exhibited by standard relay type control circuits. A standard MC100 Master Clock’s relay output performance may be enhanced with the addition of the PS-DRIVER-2/5A output module. When On-Demand resets are superimposed on an existing synchronous clock circuit, it is recommended to utilize this solid state output to eliminate the contact damaging arcing and high currents caused by high inductive loads like synchronous clock motors. The 5-amp outputs share a common feed which may be either 120VAC or 24VAC depending upon the clock or auxiliary device requirements. The outputs are individually fused with standard Type GBB fuses. Comes standard in 9" x 8" x 4" enclosure, add suffix "-BO" to order board only, or add suffix "-MP" to exchange the standard enclosure for a mounting plate for the MC100.