The MS3705HA is an industrial-grade, slim plug-in digital alarm setter designed to deliver high-precision monitoring and critical trip execution for standard industrial process loops. Engineered for high-density architectures, this 29mm wide module supports convenient wall or DIN rail mounting. It continuously measures incoming DC current or voltage signals, comparing them against two separate set-points to command two independent isolated Form C relay contact outputs. A key engineering advancement in this high-accuracy model is its front-accessible 3-digit 7-segment LED display and integrated UP/DOWN push buttons. These controls provide an absolute digital interface for parameter viewing and configuration, enabling operators to field-program trip points across a wide 0 to 105% span in hyper-granular 0.1% steps. Featuring a premium 4-way galvanic isolation barrier rated for a 2000V AC dielectric strength, the MS3705HA isolates input, power, and individual output channels to ensure absolute signal accuracy and complete ground loop elimination in harsh factory environments.
Key Product Features
- High-Accuracy Digital Microprocessor: Employs a premium digital operation circuit providing a trip point setting accuracy better than ±0.1% of span.
- Independent Multi-Parameter Adjustment: Provides full field configurability for trip points (0 to 105% of span) and flexible hysteresis limits (0.5 to 50.0% of span) independently across both output channels.
- Highly Visible Local Interface: Features a bright, front-mounted 8.0mm high 3-digit LED display alongside dedicated red status LEDs for rapid visual trip and CPU diagnostic indication.
- Heavy-Duty Form C Relay Outputs: Provides two independent relay closures rated for a maximum allowable voltage of 250V AC / 30V DC and a 5A continuous current capacity on the normally open contacts.
- Superior Environmental Fortification: Constructed within a rugged UL 94V-0 ABS resin enclosure and layered with a standard HumiSeal® polyurethane conformal coating for high resistance against moisture and airborne particulate contaminants.
