The presence of the data logger depends on the specifications of the relay and the type of control used. If the relay operates a switch release command by means of a minimum voltage coil, the use of the data logger is not necessary. However, if a current-throwing command is used, tracking on the data logger is necessary.
Most CEI 0-16 certified Thytronic relay models are already equipped with a data logger. However, for the NA60 relay alone, it is necessary to purchase an additional module called MRI. For the NA016, however, the presence or absence of the data logger is determined by the purchase code: NA016....5M100 with logger, 5M000 without logger.