The Autonics CT6Y-1P4T is a 6-digit 7-segment LED display/controller designed for precise counting and timing. It supports counter functions (count up, count down, count up/down) and timer functions (count up, count down), uses a terminal block, and offers a 1-stage preset output via an SPDT relay and a single NPN open-collector output. It adds a communications option with RS485 and operates from 100–240 VAC at 50/60 Hz, with an external power supply up to 12 VDC. Signal inputs support voltage input (PNP) or no-voltage input (NPN). The maximum counting speed is up to 10k cps, with a minimum input width of 1 ms or 20 ms, and memory protection is about 10 years. Setting ranges span from 0.001 s to 9.999 s across multiple scales, and the device features IP65 front-panel protection. The counting range is -99,999 to 999,999 with a decimal point up to the fifth digit. Reset input width and timer input widths are selectable as 1 ms or 20 ms. Operating temperature is -10 to 55°C (storage -25 to 65°C) with 35–85% relative humidity (storage the same). This model is well suited for compact industrial counting, timing, and interval control with added RS485 communication capability.