The MTT MS3121 is a terminal block type PT transmitter that reads AC voltage from a potential transformer, calculates its true RMS value, and delivers two independent, isolated DC outputs from a single compact unit. Because the two outputs are electrically isolated from each other, from the input, and from the power supply, the MS3121 lets one voltage measurement feed a control system and a monitoring or recording device at the same time, without the risk of ground loops or cross-talk between circuits.
Housed in a slim, flame-retardant ABS enclosure with drop-proof screw terminals, the transmitter clips directly onto a standard DIN rail for fast, tool-light installation in a control panel or switchgear cabinet. Flexible power options mean it can be run from an AC mains supply or a DC control-power bus, so it fits into a wide range of existing panel designs without extra conversion hardware. Fast response and stable, temperature-compensated accuracy make it well suited to continuous voltage monitoring on generators, transformers, and distribution switchgear where a reliable, isolated signal is essential.
