The MTT MS3705HA is a slim plug-in digital alarm setter that watches a DC current or voltage signal and switches two independent, isolated relay outputs when the signal crosses a set point. Unlike a simple rotary-dial alarm setter, the MS3705HA shows the trip point on a bright 3-digit LED display and lets it be set in fine 0.1% steps, giving more precise and repeatable alarm thresholds along with a clear on-panel readout of exactly where each alarm is set.
Because the two relay outputs are electrically isolated from the input, from the power supply, and from each other, the MS3705HA can drive two independent alarm circuits, such as a low and a high limit, from a single measured signal, with adjustable hysteresis to prevent relay chatter near the trip point. Like the rest of the plug-in transmitter range, it clips into its own socket base so the unit can be swapped for calibration or replacement in seconds without disturbing the field wiring, and flexible AC or DC power plus wall or DIN rail mounting keep installation straightforward.
