The adjustable response range spans 0.85 to 1.1 times the full-scale value, with a 1-second delayed switching to ignore transient dips. It monitors AC/DC control circuits with a measurable voltage range of 0 to 250 V AC and a line frequency from 15 to 400 Hz, making it suitable for both 50 Hz and 60 Hz mains as well as variable-frequency drives on the line side. The control supply voltage is universal AC/DC, rated 24 to 240 V at both 50 and 60 Hz, so it can be powered from the same circuit it monitors or from a separate control transformer without worrying about polarity.
Housed in a 22.5 mm wide enclosure (78 mm high, 100 mm deep), it snaps onto standard 35 mm DIN rail and can be mounted in any orientation — no clearance required above, below, or to the sides. Screw-type terminals accept solid wire 20-12 AWG (1x) or 20-14 AWG (2x), and stranded 18-14 AWG (1x) or 18-16 AWG (2x).
Electrical ratings and environment
Rated surge voltage resistance of 6000 V gives it solid isolation for industrial control panels where transients from contactors or drives are common. An error memory function (latching) is built in, so the relay holds the alarm state after a fault clears — useful for troubleshooting intermittent ground faults.