The MS3707G is a high-efficiency, slim plug-in distributor engineered to power two-wire level gauges and transmitters while converting their 4 to 20mA DC current loop signals into isolated standard process outputs. Optimized for system versatility and panel-density maximization, this 29mm wide module supports clean wall or DIN rail mounting and is equipped with a highly flexible design providing isolated single or dual outputs. A key engineering advantage of this model is its exceptionally wide span adjustment range (10% to 100% of span), allowing industrial instrumentation teams to deploy the transmitter across various level gauge measurement spans. To guarantee superior signal fidelity and heavy fault tolerance in demanding process plant environments, the MS3707G incorporates comprehensive 4-way galvanic isolation rated for a 2000V AC dielectric strength, complete with built-in continuous short-circuit protection. This effectively isolates field sensors, power distribution loops, and downstream control systems from harmful ground differentials and noise transients.
Key Product Features
- Built-In Two-Wire Loop Supply: Provides a dedicated transmitter power supply delivering 24 to 28V DC at zero input and a minimum of 18V DC at a full 100% loop input.
- Advanced Short-Circuit Protection: Safely limits fault currents to a typical 22mA (40mA maximum) with continuous, permanent short-circuit survival duration.
- Extended Span and Zero Calibration: Front-accessible trimmers and a hardware rotary switch provide a zero adjustment of approx. ±10% of span and an adjustable span range from 10% to 100% of span.
- Multi-Channel Isolation Barrier: High-integrity 4-way galvanic isolation among the input, Output 1, Output 2, and the power supply channels backed by a 100MΩ minimum insulation resistance.
- Industrial Material Construction: Packaged in a ruggedized, flame-retardant UL 94V-0 rated ABS resin housing utilizing reliable M3.5 nickel-plated steel screw terminals and an integrated HumiSeal® polyurethane anti-humidity coating.
