2-Channel Analog Input Thermocouple K Diagnosis The analog input module allows for the direct connection of two thermocouples. The operation of grounded sensors is possible due to the internal galvanic isolation. The module handles linearization across the entire temperature range. To compensate for the error voltage at the terminal in the range of 0 to 55 °C, cold junction compensation is performed using comparative measurement. A broken wire is indicated by a red error LED. The green LED indicates operational readiness and trouble-free communication with the bus coupler. The shield connection is directly routed to the mounting rail.