BL20 electronic module. 2 Analog Thermocouple Inputs. Ident. no.: 6827020. Fieldbus and connection technology independent. Protection class IP20. LEDs indicate status and diagnostic. Electronics galvanically separated from the field level via optocouplers. 2 analog inputs for connection of thermocouples, types B, E, J, K, N, R, S and T. Base module with internal cold compensation