Bender GmbH RCMA420-D-1 Residual Current Monitor

The LINETRAXX RCMA420-D-1 residual current monitor from Bender GmbH detects AC/DC sensitive earth‑leakage current in TN and TT systems by routing the monitored conductor through a single current transformer, with a pickup range of 10 to 500 mA and a measurement frequency up to 0–2000 Hz. It can be powered from DC 9.6–94 V or AC 16–72 V (42–460 Hz), with an operating range that supports pulsed DC and standard AC signals. The unit provides two Form-C alarm outputs (changeover contacts) with selectable normally‑open or normally‑closed operation, plus fault memory, continuous self‑monitoring, a multi‑function LC display, and password protection for settings, all housed in a 36 mm two‑module enclosure with sealable, transparent cover. Terminal options include a screw‑type version (Art. No. B94043001) or a push‑wire version (Art. No. B74043001). Typical applications include AC/DC sensitive residual current monitoring in earthed two-, three-, or four‑conductor systems, monitoring for variable‑speed drives, UPS, generators, battery systems, medical electrical equipment, and other general power‑distribution scenarios.