ABB DI831 (3BSE013212R1) – S800 I/O Digital Input Module for 24 V DC field signals

The ABB DI831 3BSE013212R1 is a digital input module in the S800 I/O family, typically used with AC 800M–based control systems and S800 I/O stations. From my experience, it’s a reliable choice when you need clean, stable 24 V DC input collection from machines, valves, proximity sensors, or interlocks—without adding complexity to your cabinet. You might notice that it drops neatly onto a TU8xx terminal base, so expansion and replacement are fast and predictable.

Company’s Order Placement Process and Guarantees

• – Warranty period: 365 days

• – Delivery time: 1 week for in-stock items; no more than one month at the latest

• – Payment: 50% advance payment; full payment prior to delivery

– Express delivery methods: FedEx, UPS, DHL

Key Features

• 24 V DC digital inputs – Designed for standard industrial sensors and dry contacts; stable detection in most plant environments.
• S800 I/O form factor – Plugs onto TU8xx terminal bases on DIN rail, making installation straightforward and service-friendly.
• Per-channel status indication – Onboard LEDs typically help technicians verify input states quickly during commissioning.
• Diagnostics and fault reporting – It seems to be well-behaved with channel- and module-level diagnostics, helping reduce troubleshooting time.
• ModuleBus connectivity – Integrates into AC 800M systems via S800 I/O ModuleBus; easy to scale and mix with AI/DI/DO/AO modules.
• Field power flexibility – Uses field 24 V DC for input circuits while the module electronics are powered via the backplane.
• Hot-swap capability (within S800 I/O rules) – In many cases, you can replace modules with minimal process interruption.

Technical Specifications

Brand / Model	ABB DI831 (3BSE013212R1)
HS Code	853890 (parts for electrical control equipment) — commonly used for I/O modules
Power Requirements	Module electronics powered via S800 ModuleBus; field inputs use external 24 V DC
Dimensions & Weight	Standard S800 module footprint (approx. 45 × 119 × 104 mm; typical module mass ~0.18–0.22 kg)
Operating Temperature	Typically 0…+55 °C in S800 I/O cabinets (observe de-rating and enclosure ventilation)
Signal Input/Output Types	24 V DC digital inputs (multi‑channel), with status LEDs and diagnostic reporting
Communication Interfaces	S800 I/O ModuleBus (for use with AC 800M via communication interfaces such as CI801/CI840A/CI854A)
Installation Method	DIN-rail via TU8xx terminal base (e.g., TU810/TU812/TU814 series); front-pluggable module

Application Fields

Typically specified in distributed control and high-availability PLC architectures where you need many 24 V DC inputs in compact cabinets:

• Process industries: water/wastewater skids, chemical dosing, boiler/burner management interlocks
• Factory automation: packaging line sensors, conveyor logic, safety interlock monitoring (per system design)
• Power and utilities: switchgear status feedback, breaker auxiliary contacts, valve/actuator feedback
• Marine and mining: ruggedized cabinets reading proximity switches and limit switches

Advantages & Value

• Reliability – S800 I/O modules are widely deployed; the DI831 typically runs for years with minimal attention.
• Compatibility – Seamless with AC 800M and S800 I/O networks; mixes alongside AI/DO/AO without surprises.
• Lower lifecycle cost – Hot-swap serviceability and clear diagnostics shorten downtime and technician hours.
• Spare parts strategy – Same form factor across S800 I/O reduces stocking burden; easy field replacement.
• Technical support – Documentation and tooling around S800 I/O are mature; engineers typically ramp fast.

One thing I appreciate is how quickly maintenance teams can trace a wiring issue using the channel LEDs and the clear terminal labeling on TU bases. A maintenance lead at a food & beverage plant told us they swapped a DI831 during production changeover “in under 5 minutes” without reworking any harnesses.

Installation & Maintenance

• Cabinet & mounting – Mount on DIN rail using a compatible TU8xx terminal base. Keep adequate ventilation; avoid heat sources. Follow S800 I/O grounding and shielding practices.
• Wiring – Use correctly rated 24 V DC field power for inputs. Separate signal and power wiring where possible; observe polarity and the terminal base connection map.
• Safety – De-energize the affected circuits before inserting or removing wiring. Hot swapping modules should follow ABB S800 procedures and your site’s MOC/LOTO policy.
• Routine checks – Periodically verify terminal torque, clean dust from module fronts, and review diagnostics in the DCS/PLC. Firmware management is typically handled at controller/communication module level.
• Spare handling – Store modules in anti-static packaging, in a dry environment. Keep one spare per cabinet row for critical lines.

Quality & Certifications

• Manufacturer quality system: ISO 9001
• Conformity: CE
• Safety approvals: cULus (typically for S800 I/O family)
• Environmental: RoHS compliant
• Warranty: 365 days

Related and Supporting Components

• Terminal bases – TU810, TU812, TU814 (selection depends on wiring density and isolation grouping)
• ModuleBus accessories – ModuleBus terminators and power feed units for S800 I/O segments
• Communication interfaces – CI801/CI840A/CI854A for linking S800 I/O to AC 800M or higher-level networks

If you’re matching an existing installation, share a photo of the terminal base and current module sticker—this typically helps confirm keying and wiring compatibility on the first pass.