Description
DO820 3BSE008514R1 ABB Module
Brand: ABB Product Series: System 800xA / S800 I/O System
Model: DO820 (Part Number: 3BSE008514R1)
Product Type: Digital Output Relay Module (8-Channel Relay Module)
DO820 3BSE008514R1 ABB Module
Technical Parameters: Channel Configuration: Features 8 individually isolated digital relay output channels (Form C / SPDT contacts). Output Voltage Rating: Supports dual AC/DC switching thresholds up to 250 V AC or 125 V DC per channel. Continuous Current Capacity: Rated for up to 3 A continuous load current per relay contact channel. Galvanic Isolation: Provides high-voltage optical and physical channel-to-channel and channel-to-system-bus isolation (up to 250 V AC isolation rating). Output Set to Predetermined State (OSP): Features configurable safe-state fallback logic, automatically setting individual output contacts to pre-defined states (Open/Closed) during communication loss or system fault. Contact Life Expectations: High-durability relay contact architecture built to withstand demanding inductive switching and frequent cycle operations. Conformal Coating: Options include G3-compliant conformal coating on internal boards for enhanced protection against airborne corrosive gases and high humidity. Diagnostic LED Array: Front panel equipped with dedicated LED status indicators providing real-time visual tracking of module health, fault conditions, and individual channel states (1 through 8). Mechanical & Mounting: Standard plug-in S800 form factor designed for snapshot installation on S800 Module Termination Units (MTUs such as TU810, TU812, TU814, or TU830).
Industrial Sectors: Electrical Power Generation and Substation Automation, Chemical and Petrochemical Refining, Oil and Gas Processing, Water and Wastewater Utilities, Metallurgy and Mining, and Pulp and Paper Mills.
Application Scenarios:
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High-Voltage Interfacing and Switching: Installed within central DCS control panels to route low-voltage controller logic out to high-voltage field devices, such as solenoid valves, motor starter coils, and alarm beacons.
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Electrical Substation Breaker Tripping: Deployed in utility control enclosures to execute reliable isolation switching and circuit breaker trip routines operating on 110 V/220 V DC auxiliary control loops.
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Galvanic Isolated Load Control: Integrated into plant environments with severe common-mode voltage differences or noisy electrical ground planes, using independent relay contacts to isolate control circuits from external field loads.
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Legacy System Interlocking and Safety Signaling: Positioned inside marshalling panels to drive external hardwired safety interlocks and status signaling loops across geographically dispersed plant sections.
