The Spectrum Series analog clock operates on a wide range of wired clock system types. From historical 3-wire synchronous systems to 2-wire midnight resets to 2-wire On-Demand reset systems, from 24V to 120V -- the Spectrum Series has it covered. The energy efficient design uses less power than previous systems allowing longer wire distances with less power supplies. An on-board microprocessor monitors the hand position to ensure accurate time display and does not require any user intervention to re-calibrate the hand location like clocks by others.

3-Wire Synchronous Operation

This microprocessor based time piece can automatically discern the reset protocol transmitted from the master clock (by National Time or others) and synchronize with the existing clocks on the system. Reset schemes from popular manufacturers such as IBM, Simplex, Lathem, Rauland, Cincinnati, Honeywell, Standard Electric Time, Faraday, Stromberg, and others are supported. Refer to the compatibility list in bulletin C-578 for details. When used with master clock by others, the SPECTRUM series clock can coexist with the existing clocks and operate similarly. However, with a National Time master clock, the clocks can coexist on the same circuit but the SPECTRUM clocks can reset immediately after a power outage without the 12-hour reset cycle required by historical clocks using National’s exclusive On-Demand reset transmission on the existing motor wiring. This provides a means to upgrade your clock system to a higher level of operation incrementally as older clocks fail or funds become available.

2-Wire Operation

With a master clock by others, a simple 0.25 second pulse at midnight can synchronize the clocks. With a National Time master clock, the On-Demand reset protocol transmits power and time information using two wires to send the clocks to the correct time at any time. This eliminates the waiting period for errant clocks following a power interruption.

Case Styles

SPECTRUM series clocks are available in either steel or ABS cases. The steel clock is equipped with an all metal case and white polystyrene dial having black markings and hands. Cases are attractively finished in Powder Gray enamel, other finishes are available upon request. A shatter-proof lens is standard. The ABS clock is composed of grey or black durable ABS with a shatter-proof polycarbonate lens. The dial is white polystyrene with black markings and hands. All clocks are furnished with a sway-proof hanger plate that securely holds clock to wall.