The CC186/2 is a double sided clock with six, 1.8 inch high digits per side. Each model is for displaying time or elapsed time in hours, minutes, and seconds (HH:MM:SS). This manual covers both single sided and the double sided versions of the clock and will refer to both simply as a CC186. The time on the display can manually be set by switches or may receive a 10-byte time data and control message via an RS232 input signal. Up to 50 CC186 displays can be connected to a single RS232 port at distances of up to 2000 feet away using a simple two-conductor cable such as Belden 8442. CC186 displays require local power to illuminate the digits. The display may be turned ON/OFF at the display and never lose time as long as the power is not disconnected. The 1.8 inch high digits are visible up to 50 feet away.