The ABB DO820 (3BSE008514R1) is an 8-channel digital output module from the S800 I/O family, designed to provide robust and reliable control for demanding industrial automation applications . Featuring electromechanical relay outputs with Normally Open (NO) contacts, this module bridges the gap between your control system and high-power field devices.
As part of the ABB S800 I/O system, the DO820 interfaces seamlessly with AC800M controllers and System 800xA via the ModuleBus. Its individually isolated channels and comprehensive diagnostic capabilities make it a trusted choice for discrete output control in process industries, power generation, and factory automation.
Item No :
DO820 3BSE008514R1Order(MOQ) :
1Payment :
EXWProduct Origin :
SwedenShipping Port :
Wuhan, Hubei, ChinaLead Time :
3-5 daysWeight :
0.5kgProducts Description
ABB DO820 3BSE008514R1 Digital Output Module in stock
| Model Number | DO820 3BSE008514R1 |
| Place of Origin | Sweden |
| Dimension/Weight | 0.5kg |
| Condition | New and Original |
| Warranty | 1 year |
| Shipping term | DHL Fedex TNT EMS UPS |
| Payment | TT / Western Union |
| Delivery time | 3-5 days |
| Service | 24 Hours Online Service |
HART pass-through:
Media: The system has pass-through functionality and can be connected either as local I/O (S800) or as Remote I/O.
Purpose: Makes HART data available for clients, e.g. Fieldbus Builder
Protocol: HART protocol
SW interface: Process data via 4 – 20 mA signal are I/O copied to application variables. HART data (status and diagnostic data) are available via “pass-through”.
HW Interface: S800 I/O modules AI845, AI895, AO845 and AO845 S900 I/O modules AI930/931 and AO930
OPC interface: Yes, via HART OPC server
8 Relay Output Channels – Normally Open (NO) Form A contacts for AC/DC load switching
Wide Voltage Range – 5 to 250 V AC/DC, accommodating diverse field devices
3A Continuous Current per Channel – Drives contactors, solenoids, valves, and indicators directly
Channel-to-Channel Galvanic Isolation – 2000 V AC dielectric test voltage; 250 V rated insulation voltage for enhanced safety
Output Safe Preset (OSP) – Predetermined safe state on communication or module fault
Relay Supply Voltage Supervision – Warning LED and error signal on power loss
Hot Swap Capability – Replace modules without powering down the system
Comprehensive Diagnostics – Fault (F), Run (R), Warning (W), OSP, and individual channel status LEDs
| Specification | Details |
|---|---|
| Catalog Number | 3BSE008514R1 |
| Type | Digital Output Module – Relay (NO) |
| Number of Channels | 8 |
| Output Type | Electromechanical Relay, Form A (SPST-NO) |
| Voltage Range | 5 – 250 V AC/DC |
| Continuous Current per Channel | 3 A (resistive load) |
| Maximum Inrush Current | 30 A for ≤200 ms (L/R > 10 ms) |
| Maximum Breaking Capacity | 720 VA AC (PF > 0.4) / 40 W DC (L/R < 40 ms) |
| Operate / Release Time | 9 ms max / 5 ms max |
| Max Operations per Hour | 2000 (at rated load) |
| Mechanical Life | > 20 × 10⁶ operations (no load) |
| Electrical Life | > 1 × 10⁶ operations (resistive, rated) |
| Galvanic Isolation | Channel-to-channel and to system; routine tested at 2000 V AC |
| Rated Insulation Voltage | 250 V |
| Power Dissipation | Typical 2.9 W |
| Current Consumption (+5V ModuleBus) | 60 mA |
| Current Consumption (+24V ModuleBus) | 140 mA |
| Maximum Field Cable Length | 600 m (shielded) |
| Diagnostic LEDs | F(ault), R(un), W(arning), O(SP), Channel 1-8 Status |
| Dimensions (W × H × D) | 45 × 119 × 102 mm (111 mm with connector) |
| Weight | Approx. 0.23 kg (0.5 lbs) |
| Mounting | S800 I/O rack / DIN rail |
| Specification | Details |
|---|---|
| Operating Temperature | 0 to +55°C (vertical mounting: 40°C) |
| Storage Temperature | -40 to +70°C |
| Relative Humidity | 5 to 95%, non-condensing |
| Protection Class | IP20 |
| Pollution Degree | 2 (IEC 60664-1) |
| Corrosive Atmosphere | ISA-S71.04 G3 |
| CE Mark | Yes |
| Electrical Safety | IEC/EN 61010-1, UL 508 |
| Marine Certification | ABS, BV, DNV-GL, LR, RS, CCS |
| RoHS Compliance | Yes (EU Directive 2011/65/EU) |
Compatible MTUs (Module Termination Units): The DO820 requires a compatible termination unit. Supported bases include:
TU811 / TU811V1 – standard screw termination
TU813 – screw termination with fuse
TU831 / TU831V1 – standard spring termination
TU836 / TU837 – extended temperature range
TU851 – with fuse and relay output
Keying Code: AD – mechanical anti-insertion keying prevents insertion of incorrect module type
OSP (Output Safe Preset): Configure predetermined output states (safe/off or hold last value) to be applied upon module or communication failure. Ensure proper configuration before commissioning .
Relay Supply Supervision: The module monitors the 24V relay drive voltage derived from the ModuleBus. Loss of this supply triggers the Warning LED and can be read as a diagnostic error via the bus. This feature can be enabled/disabled by parameter .
The ABB DO820 is suited for discrete output control across a wide range of industries:
Process Industries: Driving solenoid valves, actuators, and alarm indicators in chemical, oil & gas, and water/wastewater plants
Power Generation: Control of contactors, relays, and auxiliary systems in thermal and hydroelectric plants
Factory Automation: Switching of motors, conveyors, and packaging equipment
General Purpose: High-voltage AC/DC load switching where galvanic isolation and robust relay contacts are essential
1 × ABB DO820 Digital Output Module (3BSE008514R1)
In Stock – ready to ship same/next business day
Fully Tested – each unit verified for functionality
Competitive Pricing – significant savings
Warranty Included – purchase with confidence
Technical Support – integration assistance available
Q1: How many output channels does the DO820 have, and what type of outputs are they?
The DO820 provides 8 output channels based on electromechanical relays with Normally Open (NO) contacts (Form A / SPST) .
Q2: What voltage and current can the outputs handle?
Each channel supports a wide voltage range of 5–250 V AC/DC with a maximum continuous current of 3 A (resistive load) .
Q3: Is the DO820 suitable for high-speed switching applications?
No. As a relay-based output module, it has mechanical switching limitations—max 9 ms operate time and 2000 operations per hour at rated load. It is designed for conventional ON/OFF control, not high-frequency PWM or pulse applications .
Q4: Do I need a special base (MTU) to use this module?
Yes. The DO820 must be installed on one of the following compatible MTUs: TU811, TU813, TU831, TU836, TU837, or TU851. Check the specific TU type and revision for your chassis .
Q5: What diagnostic features does the DO820 offer?
The module provides front-panel LEDs: Fault (F), Run (R), Warning (W), Output Safe Preset (OSP), and individual channel status LEDs. It also supervises relay supply voltage and can report errors via the ModuleBus .
Q6: Does the DO820 support hot swapping?
Yes, the DO820 supports hot swap—modules can be replaced while the system remains operational, minimizing downtime .
Q7: What is the maximum field cable length for DO820 outputs?
The maximum recommended field cable length is 600 meters (656 yards) when using shielded cable .
Q8: What is the Output Safe Preset (OSP) function?
OSP allows the module to automatically set outputs to a predetermined safe state (e.g., all off or hold last value) in the event of a communication or module fault. This safety feature must be configured in the system parameters .
Q9: What is the typical power consumption of the module?
Typical power dissipation is 2.9 W. The module draws 60 mA from the +5V ModuleBus and 140 mA from the +24V ModuleBus .
Q10: Is the module intrinsically safe for hazardous areas?
No, the DO820 is not intrinsically safe. However, it can be installed in certain hazardous locations when used with appropriate external barriers or enclosures per local regulations
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