The MS3705 is a high-reliability, slim plug-in alarm setter designed to monitor and safeguard industrial process loops. This precision instrument continuously compares incoming DC current or voltage signals against two independently configured set-points (upper and lower limits), providing isolated dual Form C relay contact closure outputs for dependable alarm interlocking and process trip execution. Engineered to optimize space inside control panels, the module features a compact 29mm wide housing designed for flexible wall or DIN rail mounting. It boasts robust galvanic isolation across all active channels with a 2000V AC dielectric strength rating between the input, power supply, and each individual relay output, effectively halting ground loop propagation and enhancing noise immunity. With field-adjustable rotary switches, operations and maintenance teams can easily calibrate trip parameters to maintain precise, real-time safety thresholds across demanding factory automation architectures.
Key Product Features
- Dual-Limit Alarm Monitoring: Compares DC current or voltage loop levels against two independent upper and lower set-points to orchestrate safe system trips.
- Form C Relay Contact Outputs: Features two completely independent, isolated Form C relay contact closures supporting a robust rated load of 5A at 125V AC / 5A at 30V DC.
- Precise Front-Panel Configuration: Incorporates intuitive, front-accessible rotary switches that allow operators to dial in trip points from 0 to 99% of span in granular 1% incremental steps.
- Excellent Galvanic Isolation: Full multi-channel isolation barrier rated for 2000V AC dielectric strength for 1 minute, preventing dangerous high-voltage transients from crossing between input, power, and relay lines.
- Industrial Resilience: Built with a flame-retardant UL 94V-0 rated ABS resin housing, featuring integrated red status LEDs for rapid visual trip indication and a standard premium HumiSeal® polyurethane conformal coating.
