The DUB71 is a precise TRMS AC/DC over or under voltage (selectable by DIP-switch) monitoring relay. Owing to the built-in latch function, the ON-position of the relay output can be maintained. Inhibit function can be used to avoid relay operation when not desired (maintenance, transitions). The LED's indicate relay output status, alarm and power supply ON.
The DUB71 monitoring relay from Fubihong provides true RMS measurement of AC or DC voltages from 0.1 V up to 500 V. Users can select the measuring range via DIP‑switches and adjust voltage level, hysteresis and delay settings on relative scales. The relay features a 5 A SPDT output that can be configured as normally de‑energized (N.D.) or normally energized (N.E.) and includes LED indicators for power, alarm and relay status.
The unit is housed in a 35.5 mm wide DIN‑rail compatible case (35.5 × 81 × 67.2 mm, ~150 g) and operates from 24/48 VAC or 115/230 VAC supplies. It meets IEC standards for over‑voltage category III, offers IP20 protection, and is approved by UL, CSA and CE.
| Measuring range | 0.1 to 500 V AC/DC |
|---|---|
| Output type | 5 A SPDT relay (N.D. or N.E. selectable) |
| Power supply options | 24/48 VAC or 115/230 VAC (±15 %) |
| Housing dimensions | 35.5 × 81 × 67.2 mm |
| Weight | ≈ 150 g |
| Dielectric voltage | 4 kV (1.2/50 µs) |
It can monitor AC or DC voltages from 0.1 V up to 500 V.
The relay provides a 5 A SPDT output that can be set as normally de‑energized (N.D.) or normally energized (N.E.).
Use the DIP switches; hysteresis is set on a relative scale from 0 % to 30 % of the set value.
The relay can be powered from either 24/48 VAC or 115/230 VAC, each with a ±15 % tolerance.