The document describes a TRMS AC/DC over or under voltage monitoring relay with adjustable parameters and programmable features. It is suitable for measuring ranges from 0.1 to 500 V AC/DC. The product features an 8 A SPDT relay output and LED indication.
The DUB01 (DIN‑rail) and PUB01 (plug‑in) relays monitor AC and DC voltages from 0.1 V up to 500 V. Users can select the measuring range via DIP‑switches, adjust voltage level, hysteresis and delay (0.1‑30 s), and choose a programmable latching or inhibit mode. LED indicators show power, alarm and relay status.
Both versions feature an 8 A SPDT output relay, optional N.D. or N.E. contacts, and can be powered from 24 VDC, 48 VDC, 24/48 VAC or 115/230 VAC. Mechanical life exceeds 30 k operations, electrical life over 10 k cycles, and dielectric strength up to 2 kV AC (rms). The manual includes wiring and operation diagrams, DIP‑switch settings, and installation instructions.
| Measuring range | 0.1 V to 500 V AC/DC |
|---|---|
| Output relay rating | 8 A SPDT, 250 VAC insulation |
| Power supply options | 24 VDC, 48 VDC, 24/48 VAC, 115/230 VAC |
| Mechanical life | >30 k operations |
| Electrical life | >10 k operations at 8 A, 250 V |
They can monitor voltages from 0.1 V up to 500 V for both AC and DC signals.
The range is selected using DIP‑switches 1 and 2 on the relay.
The input voltage must not exceed 300 VAC/DC for the PUB01 version.