DO820 8-Channel Digital Output Relay Module 24-230V AC/DC | ABB

The Original New ABB DO820 3BSE008514R1 is an 8-channel digital output relay module for the ABB S800 I/O system, designed to provide robust switching performance for demanding industrial control applications. It features 8 individually isolated normally open (NO) relay outputs, each rated for 3 A continuous current with a wide voltage range of 5–250 V AC/DC. Integrated diagnostics, LED status indicators, and OSP (Output State Preset) functionality ensure reliable operation in distributed control environments.

Core Engineering Highlights:
8 individually isolated relay output channels (NO) | 5–250 V AC/DC output range | 3 A continuous current per channel | 30 A inrush make current (200 ms) | Individually galvanically isolated channels | ModuleBus current consumption: 60 mA @ 5 V, 140 mA @ 24 V | 2.9 W typical power dissipation | 600 m maximum field cable length | –40°C to +70°C operating temperature | Hot-swappable | IP20 protection

Key Features:

• Original New ABB DO820 module (3BSE008514R1)

• 8 normally open (NO) relay output channels with individual isolation

• Wide operating voltage range: 5–250 V AC/DC

• 3 A continuous current per channel; 30 A make current capability (200 ms, L/R >10 ms)

• Max. break power: 720 VA (AC, power factor >0.4), 40 W (DC, L/R <40 ms)

• Optical isolation barrier per channel with EMC protection components

• Front panel LEDs: Fault (F), Run (R), Warning (W), Output Status (OSP), and Channel 1-8 Status indicators

• Relay supply voltage supervision (24/12 V) with error signal via ModuleBus

• OSP (Output State Preset) timer: 256, 512, or 1024 ms—sets outputs to predetermined state upon error detection

• Module Termination Unit (MTU) keying code: AD

• Hot-swappable—replace module without system shutdown

• 600 m maximum field cable length

• Rated insulation voltage: 250 V; dielectric test voltage: 2000 V AC

Applications:

• Valve actuation and positioner control

• Motor starter control and contactor switching

• Solenoid switching in chemical and petrochemical processing

• Alarm signaling and annunciator control

• Pump control in water and wastewater treatment

• Conveyor and material handling systems

• Power generation and utility infrastructure

• Oil and gas facility automation

Technical Specifications:

System Compatibility:

• Compatible with ABB S800 I/O system architecture

• AC 800M controllers: PM860, PM861, PM862, PM863, PM864, PM865, PM866 series

• ABB 800xA DCS (versions 4.0, 4.1, 5.0, 5.1, 6.0)

• Freelance 800F distributed control system

• Module Termination Units (MTU): TU811, TU813, TU831, TU836, TU837, TU851

• ModuleBus cluster communication

• Third-party integration via PROFIBUS DP, PROFINET, or Modbus TCP gateways

Related Products:

• DI810 – 16-channel digital input module, 24V DC

• DO802 – 8-channel digital output relay module

• TU810 / TU813 / TU831 – Module Termination Units (MTU) for S800 I/O

• CI801 – PROFIBUS interface module for S800 I/O

• TU836 / TU837 – Fused MTUs for relay output protection

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. ABB, S800, 800xA, and AC 800M are trademarks of ABB Group.