Residual current monitoring device RCM 202-AB The RCM 202-AB is used with connected current transformers to measure and monitor residual currents of types A, B and B+ in TN and TT systems (earthed AC systems). Supply voltage: 85 ... 305 V AC (50/60Hz) - Residual current measurement via up to two connected current transformers - Transformer connection monitoring for wire breakage or short circuit per channel - Recording, evaluation and monitoring of residual currents of types A and B in accordance with IEC 62020 - Recording of sinusoidal alternating residual currents with frequencies up to 20 kHz (type B+) - Measured value and extreme value memory with time stamp Measuring channels - Two current transformer connections (compatible with all Janitza residual current transformers) - AC/DC measuring range: 10mA ... 20AMeasured value display and operation - Two-color LED display (128 x 64 pixels) - 3-button operation- German, English and Spanish user interface selectableCommunication- RS485 interface (protocol: Modbus RTU)- Compatible with all communication-capable Janitza Modbus master devices