DO820 3BSE008514R1 ABB 8-channel 230 V AC/DC Relay Output Module IP20 3A

1. Product Overview
The ABB DO820 (Part Number: 3BSE008514R1) is a classic digital output module in the ABB S800 I/O family. It features 8 relay-isolated outputs, with a rated current of 3A per channel. Compatible with a wide range of loads (AC 24–230V and DC 24–110V), it can directly drive field devices such as solenoid valves, contactors, alarms, and motor starters, providing a highly reliable and easy-to-maintain solution for switching control in process automation, power automation, and intelligent manufacturing applications.

2. Key Features
- High Isolation: Each channel features independent relay isolation with a withstand voltage of ≥2 kV, effectively preventing ground loops and surge interference.
- Millisecond Response Time: Typical operating time < 8 ms, meeting the requirements for high-speed sequential control and fault interlocking.
- Wide Temperature and Voltage Range: Industrial-grade temperature range of -40…+70 °C; 12…48 VDC redundant power supply; suitable for long-term operation in harsh environments such as offshore platforms and desert power plants.
- Tool-less Installation: Standard 35 mm DIN rail mounting; supports hot-swapping; built-in LED channel indicators and group diagnostics; replacement in 10 seconds, minimizing downtime.
- Open Protocol: Seamless integration with AC 800M, AC500, and third-party PLC/DCS via PROFIBUS-DP/V1, DeviceNet, or Modbus-TCP, reducing spare parts and training costs.

3. Technical Specifications

- Output Channels: 8 × Relay (Normally Open Contacts)
- Contact Rating: 3 A / 250 VAC, 3 A / 30 VDC (resistive load)
- Minimum Load: 1 mA / 5 V
- Isolation Voltage: Channel-Bus 2 kVrms; Channel-Channel 1 kVrms
- Response Time: ≤ 8 ms (energize), ≤ 5 ms (de-energize)
- Power Consumption: ≤ 1.5 W (no load)
- Protection Level: IP20 (IEC) (IEC 60529)
- Dimensions/Weight: 102 × 119 × 45 mm, approx. 0.3 kg
- Certifications: CE, UL, cUL, ATEX Zone 2, IECEx, RoHS

4. Typical Applications
- Process Industry: Chemical reactor valve control, pharmaceutical sterilization cabinet interlocking, water treatment pump/valve control
- Power & Energy: Substation circuit breaker operation, UPS unit switching, photovoltaic combiner box control
- Discrete Manufacturing: Automotive welding line fixtures, machine tool cooling pumps, on/off control of heating elements in packaging machines
- Infrastructure: Precision air conditioning for data centers, airport baggage conveyor systems, building lighting and fire protection dampers

5. Compatibility and Integration
- Directly plugs into ABB S800 I/O rack; supports PROFIBUS or Ethernet communication via interface modules such as CI830/CI867
- Supports unified configuration with ABB Compact Product Suite, 800xA, Symphony Plus, and Freelance DCS; channel-level diagnostic information can be uploaded to asset management systems for predictive maintenance

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