The ABB 216GD61a (HESG324436M1/A) serves as a high-density relay and optocoupler interface board purpose-built for the Symphony DIN (SD) controller series. It manages discrete bidirectional data paths by providing complete galvanic isolation between low-power logic processors and high-voltage field assets.
Technical Specifications
Brand: ABB
Product Series: Symphony DIN (SD) Control and I/O Family
Model Designation: 216GD61a
Part Code: HESG324436M1/A
Functional Variant: Combined Relay Outputs and Optocoupler Inputs Interfacing Board
Control Logic Input Potential: 24 V DC internal operating voltage
Field-Side Working Potential: Nominal 110 V operational rating for field switching execution
Maximum Switching Capability: Rated for frequencies up to approximately 1.23 kHz
Chassis Form Factor: Compact hot-swappable layout matching proprietary SD series mounting subracks
Thermal Performance Thresholds: Safe continuous operation from -40 to +85 degrees Celsius limits
Industrial Application Scenarios
This Symphony DIN interface board is integrated into power plant turbine controls, petrochemical process platforms, and large manufacturing distribution racks to isolate incoming field sensor metrics and actuate heavy 110V trip-coil interlocks without overtaxing localized bus logic.
