Description Specifications Description The Model ATC550 TC/PID Controller 1/16 DIN from the Automatic Timing and Controls comes standard with a dual 4 digit 7 segment led display,TC / RTD input, two setpoints, celsius and fahrenheit selectable scale, field selectable control output (relay or SSR), auxiliary output (relay or SSR depending on model), led indicators, 1/16 din (48 x 48 mm) housing, contact ratings of 5a @ 230vac / 30vdc resistive for control and alarm, a 12vdc SSR drive and a supply operating voltage range of 85 to 270 vac/dc (50/60Hz). The ATC550 series is UL approved and CE certified.Features:Dual Display, 4-digit, 7-segment LEDTC/RTDPID, ON/OFF ControlTwo Setpoints°C/ °F SelectableField selectable Control Output (Relay or SSR)Auxiliary Output: Relay / SSREasy to use State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Product Specifications General SpecificationsDigits:4 digit, 7 segment LED Dual DisplayHeight of Upper display: 0.3785"Height of Lower display: 0.2720"LED Indications:Relay On, Tune, Soak TimeInputs:Thermocouple (J,K,T,R,S) / RTD (Pt100)Sampling Time:250 msInput Filter (FTC):0.2 to 10.0 secSupply Voltage:85 to 270V AC/DC (50/60 Hz)Temperature:Operating: 0° to 50°F (32° to 122°C)Storage: -20° to 75°F (-4° to 167°C)Humidity:95% RHControl Output:Relay - 12V DC SSRAuxilary Output:RelayTemperature Unit:C/F deg selectablePower Consumption:6VA max @ 230 VACProtection Level:IP65 for faceplate Literature & Docs Accessories