PRODUCT INFORMATION
Product Overview
The ABB DI821 3BSE008550R1 is an 8-channel digital input module designed for the S800 I/O system. It processes 230 V AC and 220 V DC discrete field signals. Each channel features individual optical isolation to prevent electrical interference. An integrated 6 ms analog filter suppresses incoming electrical noise. The unit draws 50 mA from the 5 V ModuleBus supply. Internal power dissipation typically equals 2.8 W during normal operation.
This module supports dedicated process voltage supervision using channels 1 and 8. Channel 1 supervises field voltage for channels 2 through 4. Channel 8 supervises field voltage for channels 5 through 7. Loss of field voltage triggers the module warning LED and activates internal error signaling. Diagnostic alerts transmit across the ModuleBus backplane to the host controller. The unit mounts onto standard Module Termination Units.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Signal specification | 230 V a.c., 220 V d.c. |
|---|
| Number of channels | 8 |
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| Signal type | Current sinking |
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| HART | No |
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| SOE | No |
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| Redundancy | No |
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| High integrity | No |
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| Intrinsic safety | No |
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| Mechanics | S800 |
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| Input voltage range, "0" | 0..50 V a.c., 0..40 V d.c. |
|---|
| Input voltage range, "1" | 164..264 V a.c., 175..275 V d.c. |
|---|
| Input impedance | 21 kΩ (a.c.) / 134 kΩ (d.c.) |
|---|
| Isolation | Individually isolated channels |
|---|
| Filter times (digital, selectable) | 2, 4, 8, 16 ms |
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| Input frequencey range | 47..63 Hz |
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| Analog filter On/Off delay | 5 / 28 ms |
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| Current limiting | Sensor power can be current limited by the MTU |
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| Maximum field cable length | 200 meters (219 yards) 100 pF/m for a.c., 600 meters (656 yards) for d.c. |
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| Rated insulation voltage | 250 V |
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| Dielectric test voltage | 2000 V a.c. |
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| Power dissipation | Typ. 2.8 W |
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| Current consumption +5 V Modulebus | 50 mA |
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| Current consumption +24 V Modulebus | 0 |
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| Current consumption +24 V external | 0 |
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| Front LED’s | F(ault), R(un), W(arning), Channel 1-16 Status |
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| Supervision | Process voltage, Channel 1 and 8 can be used per group |
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| Status indication of supervision | Module Error, Module Warning, Channel error |
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| CE mark | Yes |
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| Electrical safety | EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201 |
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| Hazardous Location | - |
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| Marine certification | ABS, BV, DNV, LR, CCS |
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| Temperature, Operating | 0 to +55 °C (+32 to +131 °F), approvals are issued for +5 to +55 °C |
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| Temperature, Storage | -40 to +70 °C (-40 to +158 °F) |
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| Pollution degree | Degree 2, IEC 60664-1 |
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| Corrosion protection | ISA-S71.04: G3 |
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| Relative humidity | 5 to 95 %, non-condensing |
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| Max ambient temperature | 55 °C (131 °F), for vertical mounting in compact MTU 40 °C (104 °F) |
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| Protection class | IP20 according to IEC 60529 |
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| EMC | EN 61000-6-4 and EN 61000-6-2 |
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| Overvoltage categories | IEC/EN 60664-1, EN 50178 |
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| RoHS compliance | EU RoHS, UAE RoHS, CN RoHS |
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| WEEE compliance | DIRECTIVE/2012/19/EU |
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| Use with MTU | TU811, TU813, TU831, TU839, TU851 |
|---|
| Keying code | AC |
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| Width | 45 mm |
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| Depth | 102 mm, 111 mm including connector |
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| Height | 119 mm |
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| Weight | 0.18 kg |
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TECHNICAL INFORMATION
Features
- Eight individually isolated digital input channels for AC and DC operation.
- Built-in current limiting and EMC protection on every input channel.
- Process voltage supervision functionality configurable on channels 1 and 8.
- Front panel LED indicators displaying Fault, Run, Warning, and input channel states.
- Optical isolation barrier rated for 2000 V AC dielectric testing.
- Selectable digital filter times of 2, 4, 8, and 16 milliseconds.
TECHNICAL INFORMATION
Applications
- Supervision of 230 V AC field switches and auxiliary motor contacts.
- Interfacing 220 V DC discrete control signals in utility automation systems.
- Distributed digital input processing in ABB S800 I/O process installations.
TECHNICAL INFORMATION
Connections / Interfaces
- ModuleBus communication interface drawing 50 mA at +5 V DC.
- Supports field wiring through compatible MTU terminal bases.
- Compatible terminal units include TU811, TU813, TU831, TU839, and TU851.
- Maximum field cable length reaches 200 meters for AC and 600 meters for DC.
TECHNICAL INFORMATION
Installation Guidelines
- Snap the module onto an approved S800 Module Termination Unit.
- Ensure keying code AC aligns correctly before seating the module.
- Limit ambient temperature to 40 °C when mounting vertically in compact MTU units.
- Maintain IP20 enclosure protection by mounting inside an industrial cabinet.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure digital input filter settings through engineering software to 2, 4, 8, or 16 ms.
- Assign channel 1 for voltage supervision across channels 2 through 4 if required.
- Assign channel 8 for voltage supervision across channels 5 through 7 if required.
TECHNICAL INFORMATION
Compatibility
- ABB S800 I/O communication interfaces and controllers via ModuleBus.
- Module Termination Units TU811, TU813, TU831, TU839, and TU851.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- The 3BSE008550R1 DI821 module serves as the primary 230 V AC/DC input for S800 I/O.
- Replacement units install directly onto existing matching MTUs using mechanical keying code AC.
TECHNICAL INFORMATION
Compliance and Certifications
- CE Mark
- EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201
- EN 61000-6-4, EN 61000-6-2
- Marine certifications: ABS, BV, DNV, LR, CCS
- ISA-S71.04: G3 corrosion protection
- EU RoHS, UAE RoHS, CN RoHS
- WEEE Directive 2012/19/EU
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSABB S800 I/O communication interfaces and controllers via ModuleBus. Module Termination Units TU811, TU813, TU831, TU839, and TU851.
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 is the primary function of the ABB DI821 3BSE008550R1?
The DI821 module acquires discrete 230 V AC or 220 V DC field signals across eight isolated channels.
Which Module Termination Units are compatible with the DI821?
The module mounts on ABB MTU models TU811, TU813, TU831, TU839, and TU851.
How does the voltage supervision feature function on DI821?
Channel 1 supervises voltage for channels 2 to 4, while channel 8 supervises channels 5 to 7.
What is the market reference price for the DI821 3BSE008550R1?
Secondary market observations show an indicative reference price of approximately 139 USD. Figures represent market reference pricing only and are not a final quotation.
