PRODUCT INFORMATION
Product Overview
The ABB DO821 3BSE013250R1 is an 8-channel digital output module for S800 I/O systems. This unit provides normally closed relay contacts rated up to 250 V a.c. or d.c. It handles a maximum continuous output current of 3 A per channel. All output channels are individually isolated from channel to channel and to circuit common.
Each output channel includes an optical isolation barrier, an output state LED, and a relay driver. Internal EMC protection components protect the relay switching circuits against electrical transients. The module monitors internal relay supply voltage derived from the 24 V ModuleBus power distribution. A supply voltage loss triggers an error signal and activates the front Warning LED. Supervision can be enabled or disabled through software parameters.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Signal specification | 230 V a.c./d.c. (5-250 V a.c./d.c.), 3 A |
|---|
| Number of channels | 8 |
|---|
| Signal type | Relay (NC) |
|---|
| HART | No |
|---|
| SOE | No |
|---|
| Redundancy | No |
|---|
| High integrity | No |
|---|
| Intrinsic safety | No |
|---|
| Mechanics | S800 |
|---|
| Isolation | Individually isolated, channel-to-channel and to circuit common |
|---|
| Current limiting | Can be current limited by the MTU |
|---|
| Maximum field cable length | 600 meters (656 yards) |
|---|
| Rated insulation voltage | 250 V |
|---|
| Dielectric test voltage | 2000 V a.c. |
|---|
| Power dissipation | Typ. 2.9 W |
|---|
| Current consumption +5 V Modulebus | 60 mA |
|---|
| Current consumption +24 V Modulebus | 140 mA |
|---|
| Current consumption +24 V external | 0 |
|---|
| Front LED’s | F(ault), R(un), W(arning), O(SP), Channel 1-8 Status |
|---|
| Supervision | 24 / 12 V Relay power converter monitor |
|---|
| Status indication of supervision | Module Error, Module Warning, Channel error |
|---|
| CE mark | Yes |
|---|
| Electrical safety | EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201 |
|---|
| Hazardous Location | - |
|---|
| Marine certification | ABS, BV, DNV, LR, CCS |
|---|
| Temperature, Operating | 0 to +55 °C (+32 to +131 °F), approvals are issued for +5 to +55 °C |
|---|
| Temperature, Storage | -40 to +70 °C (-40 to +158 °F) |
|---|
| Pollution degree | Degree 2, IEC 60664-1 |
|---|
| Corrosion protection | ISA-S71.04: G3 |
|---|
| Relative humidity | 5 to 95 %, non-condensing |
|---|
| Max ambient temperature | 55 °C (131 °F), for vertical mounting in compact MTU 40 °C (104 °F) |
|---|
| Protection class | IP20 according to IEC 60529 |
|---|
| EMC | EN 61000-6-4, EN 61000-6-2 |
|---|
| Overvoltage categories | IEC/EN 60664-1, EN 50178 |
|---|
| RoHS compliance | EU RoHS, UAE RoHS, CN RoHS |
|---|
| WEEE compliance | DIRECTIVE/2012/19/EU |
|---|
| Use with MTU | TU811, TU813, TU831, TU836, TU837, TU851 |
|---|
| Keying code | CA |
|---|
| Width | 45 mm |
|---|
| Depth | 102 mm, 111 mm including connector |
|---|
| Height | 119 mm |
|---|
| Weight | 0.23 kg |
|---|
TECHNICAL INFORMATION
Features
- Provides eight individually isolated normally closed relay output channels.
- Switches nominal voltages up to 250 V a.c. or d.c.
- Delivers continuous load current up to 3 A per channel.
- Supervises internal 24 V to 12 V relay power converter supply voltage.
- Displays status using front LEDs for Fault, Run, Warning, and OSP.
- Includes individual status LEDs for each of the eight output channels.
TECHNICAL INFORMATION
Applications
- Interfacing discrete field devices in S800 I/O automation systems.
- Switching a.c. or d.c. actuators requiring normally closed contact logic.
- Galvanically isolated relay output control in industrial electrical cabinets.
TECHNICAL INFORMATION
Connections / Interfaces
- Mounts onto compatible S800 Module Termination Units.
- Routes field wiring connections through termination unit terminal blocks.
- Communicates over the S800 I/O ModuleBus backplane interface.
- Accommodates field cable runs up to 600 meters in length.
TECHNICAL INFORMATION
Installation Guidelines
- Fit the module onto a supported S800 Module Termination Unit.
- Verify that mechanical keying code CA matches the termination unit before seating.
- Derate operating ambient temperature to 40 °C when mounting vertically in compact MTUs.
- Operate up to 55 °C ambient temperature in standard horizontal mounting arrangements.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure module operational parameters within the system engineering environment.
- Enable or disable relay voltage supervision using the ModuleBus software parameter.
- Read supervision status flags including Module Error, Module Warning, and Channel Error.
TECHNICAL INFORMATION
Compatibility
- Mounts on ABB Module Termination Units TU811, TU813, TU831, TU836, TU837, and TU851.
- Communicates across the S800 I/O ModuleBus backplane interface.
TECHNICAL INFORMATION
Compliance and Certifications
- CE mark compliant.
- Certified to electrical safety standards EN 61010-1, UL 61010-1, EN 61010-2-201, and UL 61010-2-201.
- Meets EMC immunity and emission standards EN 61000-6-4 and EN 61000-6-2.
- Holds marine certifications from ABS, BV, DNV, LR, and CCS.
- Provides ISA-S71.04 Class G3 harsh environment corrosion protection.
- Complies with EU RoHS, UAE RoHS, CN RoHS, and WEEE directives.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSMounts on ABB Module Termination Units TU811, TU813, TU831, TU836, TU837, and TU851. Communicates across the S800 I/O ModuleBus backplane interface.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What contact configuration does the ABB DO821 module provide?
The DO821 provides eight normally closed relay outputs. Each channel is individually isolated from other channels and common.
What are the load voltage and current ratings for the DO821 3BSE013250R1?
The module switches 5 to 250 V a.c. or d.c. Maximum continuous current is 3 A per channel.
Which module termination units support the ABB DO821?
The DO821 uses keying code CA. Compatible termination units include TU811, TU813, TU831, TU836, TU837, and TU851.
What is the reference price for the ABB DO821 module?
Observed market reference pricing is 148 USD for refurbished condition. This is indicative reference pricing only, not a final quotation.
