led display, led displays, led, led sign, led signs, outdoor electronic signs, electronic signs, electronic sign, electronic display, electronic displays, led moving message display, moving message display, moving message signs, message center, message display, signage, digital signs, digital display clock, indoor led signs, outdoor led signs, full color display, outdoor led, sign, andon, andon board, alpha acd readerboards, acd, acd wallboards, marquee, wallboards, readerboards, acd software, acd wallboards, acd readerboards, reader boards, acd programmable displays, time and temperature sign,time temp sign, ticker, serial interface, brand-name plc, real-time stats, clocks ansi terminal mode serial interface discrete inputs isolated and non-isolated inputs event counting pulse duration measurement period measurement programmable timekeeping products, synchronous serial clocks, counters, timers, lean manufacturing, visual lean productivity, salescaster "