Safety transformer Acti 9 iTR. Output 12-24V AC from 230V low-voltage network, power 63VA. With bell and safety transformers, low voltages can be taken from a low-voltage network. Short-circuit proof. Protection class II with terminal cover (optional). Galvanic isolation between primary and secondary voltage. The bell transformer iTR meets the following standards - EN 61558-2-6 and EN 60742.