ABB DSDI110AK14 (3BSE019927R1) – 24 VDC Digital Input Module for S800 I/O Systems

The ABB DSDI110AK14 is a compact 24 VDC digital input module from the S800 I/O family, used widely with AC 800M and Symphony Plus controllers. From my experience, it’s a straightforward drop‑in for brownfield expansions where you need stable, noise‑tolerant DI points without rewriting your I/O strategy. You might notice that the “K14” keying helps prevent mis‑slotting on the termination unit, which in many cases saves time during commissioning and service.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Lead time: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment prior to delivery
• Express options: FedEx, UPS, DHL

Key Features

• 24 VDC digital inputs: Designed for standard industrial sensors and dry contacts found on field panels and machinery.
• Channel density that fits most panels: Typically 16 DI channels per module, helping consolidate cabinet space.
• S800 I/O compatibility: Works with AC 800M controllers through the ModuleBus, so no extra gateways are usually needed.
• Keyed installation (K14): The K14 keying aligns with the proper termination unit to avoid wiring mix-ups during maintenance.
• Noise-resistant design: In many cases, performs reliably in electrically noisy environments common to power and process sites.
• Tooling and diagnostics: Integrates with ABB engineering tools for status monitoring and point testing, which speeds FAT/SAT.

Technical Specifications

Application Fields

This module suits discrete and process plants where robust 24 VDC digital sensing is needed: power generation auxiliaries, water & wastewater skids, oil & gas compressor stations, mining/conveyors, and pulp & paper machine sections. One thing I appreciate is how it drops into existing S800 racks during turnaround projects—technicians typically wire limit switches, pushbuttons, valve end‑switches, and relay contacts directly to the TU, then the DSDI110AK14 handles the rest.

Advantages & Value

• Proven reliability: S800 I/O has a strong track record in continuous‑process environments with minimal nuisance trips.
• Lifecycle continuity: Compatible with common TU8xx bases, which makes replacement and expansion straightforward.
• Cabinet efficiency: The channel density typically reduces I/O card count, cutting panel footprint and wiring costs.
• Ease of maintenance: Front extraction and keyed mounting (K14) help reduce maintenance errors and downtime.
• Support readiness: Spares are easy to stock; most sites keep a couple on the shelf due to high interchangeability.

Feedback from a power plant client: “Swapping a faulty DI card took under 10 minutes. The keying kept us from mixing modules, and the points came back healthy right away.”

Installation & Maintenance

• Cabinet & ventilation: Install in an enclosed control cabinet per IEC/UL standards. Maintain ambient 0…55 °C with adequate airflow.
• Termination units: Mount on ABB TU8xx (e.g., TU810/TU812/TU814). K14 keying should match the TU position to prevent mismatch.
• Wiring: Use industrial 24 VDC wiring practices; typical cross‑section 0.5–2.5 mm². Keep sensor and power cabling segregated to reduce noise.
• ESD & safety: De‑energize the ModuleBus before inserting/removing modules. Observe ESD precautions when handling.
• Routine checks: Periodically verify terminal tightness, clean dust from vents, and confirm DI point status in engineering tools after shutdowns.
• Firmware/config: While DI modules usually require minimal configuration, it’s good practice to confirm module definition and point naming after replacement.

Quality & Certifications

• CE marked
• UL/cUL conformity (typical for S800 I/O ranges)
• RoHS compliant
• Manufactured under ISO 9001 quality systems
• Standard manufacturer warranty terms apply; we provide a 365‑day warranty on supply

Supporting Components and Compatibility

• Recommended TUs: TU810, TU812, TU814 (selection depends on wiring style and channel count; keying should match K14).
• System integration: S800 I/O with AC 800M and Symphony Plus; connects over ModuleBus via CI8xx communication interfaces at the head of the I/O string.
• Common sensors: Proximity switches, float/level contacts, pressure switch contacts, pushbuttons, relay outputs at 24 VDC.