Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | ABB DP840 3BSE028926R1 |
| Manufacturer | ABB |
| Product Category | Digital Input Module (S800 I/O Series) |
| Channels | 16 isolated inputs |
| Input Voltage Range | 24 VDC nominal (19.2–30 VDC) |
| Logic Threshold | 15 VDC (ON), 5 VDC (OFF) |
| Response Time | ≤1 ms (typical) |
| Isolation | 500 VAC channel-to-channel & channel-to-backplane |
| Backplane Communication | S800 I/O Bus (via carrier module) |
| Power Consumption | 1.2 W (typical) |
| Operating Temperature | –25°C to +70°C |
| Safety Certification | SIL 3 (IEC 61508), Cat. 4 (EN 954-1) |
| Connection Interface | Removable screw terminal block |
| Compatible Carriers | CI840, CI847, CI854, etc. |
ABB DP840 3BSE028926R1
Product Introduction
The ABB DP840 3BSE028926R1 is a high-density 16-channel digital input module designed for ABB’s flagship S800 I/O system within the 800xA distributed control architecture. This module converts field-level discrete signals (e.g., switch contacts, relay status) into process data for real-time monitoring and control. Engineered for critical industrial applications, the DP840 features galvanic isolation per channel, enabling safe operation in electrically noisy environments.
As a core component of ABB’s modular S800 I/O family, the 3BSE028926R1 interfaces with carrier modules (e.g., CI840) to communicate with AC 800M controllers. Its SIL 3 certification ensures compliance with stringent functional safety requirements for processes in oil & gas, power generation, and chemical plants. The ABB DP840 delivers deterministic data acquisition with sub-millisecond response times, forming a reliable foundation for safety instrumented systems (SIS) and process shutdown logic.
Core Advantages and Technical Highlights
Ultra-Fast & Reliable Signal Acquisition: With ≤1 ms response time per channel, the DP840 3BSE028926R1 captures transient events critical for safety logic execution. Redundant diagnostics verify signal integrity 1,000×/second.
Enhanced Safety & Isolation: Each channel features 500 VAC galvanic isolation, preventing ground loops and cross-channel interference. Meets SIL 3 hardware fault tolerance requirements with HFT=1 architecture.
Extreme Environmental Robustness: Operates reliably from –25°C to +70°C without derating. Conformal-coated PCB resists humidity, dust, and corrosive atmospheres (certified for ISA-71.04 G3 severity).
Seamless System Integration: Hot-swappable design allows module replacement without system shutdown. Auto-recognized by ABB’s Control Builder engineering tool, reducing commissioning time. Compatible with all S800 carrier revisions.
Lifecycle Management: Firmware updatable via Control Builder. Built-in channel-level diagnostics (open wire, short circuit) minimize troubleshooting downtime. MTBF > 300,000 hours per IEC 61709.
Typical Application Scenarios
Safety Shutdown Systems (ESD): Monors emergency stop buttons, flame detectors, and pressure switches in SIL 3-rated oil/gas shutdown panels. The DP840 3BSE028926R1’s deterministic response ensures <100 ms trip execution.
Power Plant Turbine Control: Reads turbine lube oil pressure switches, valve limit switches, and fire protection system statuses, integrating with ABB’s 800xA DCS for coordinated protection.
Pharmaceutical Batch Processing: Tracks interlock signals from cleanroom access doors and safety mats, enabling GMP-compliant access control.
Marine LNG Loading Systems: Monitors intrinsically safe (IS) zone 1/21 sensors for leak detection during cryogenic transfer, leveraging its ATEX-compatible isolation.
Water Treatment PLC Backups: Provides hardwired fallback for pump fault signals when SCADA communications fail.
Related Model Recommendations
ABB CI840 3BSE041882R1: S800 carrier module for mounting the DP840 3BSE028926R1 (supports ≤12 I/O modules).
ABB DO840 3BSE020838R1: 16-channel digital output module – complementary to DP840 for control loops.
ABB AI845 3BSE008518R1: Analog input module for temperature/flow signals in same S800 rack.
ABB FI830F 3BSE003127R1: Foundation Fieldbus interface for integrating DP840 with smart devices.
ABB SD822 3BSC610068R1: Signal conditioner for interfacing 120VAC sensors with DP840’s 24VDC inputs.
ABB PM864AK1 3BSE018161R1: AC 800M controller for processing DP840 data.
ABB TA520 3BSE007389R1: Terminal unit for redundant DP840 installations.
ABB CP635-T 3BSE039204R1: Panel-mounted HMI for visualizing DP840 alarms.
ABB DP840 3BSE028926R1
Installation, Commissioning and Maintenance Instructions
Installation Preparation: Mount the ABB DP840 3BSE028926R1 on a compatible carrier (e.g., CI840) with S800 backplane power OFF. Verify carrier firmware compatibility (≥v3.0). Use shielded twisted-pair cables for inputs; ground shields at one end. Maintain 10 mm spacing between high-voltage (>60VDC) and DP840 wiring.
Maintenance Suggestions: Quarterly: Check terminal block torque (0.5 N·m). Annually: Verify isolation resistance (>100 MΩ at 500VDC). Monitor channel diagnostics via Control Builder or Asset Vision. Replace modules using ABB’s hot-swap procedure: (1) Disable module in software, (2) Release lever, (3) Extract horizontally. Never exceed 30 VDC input.
Service and Guarantee Commitment
ABB provides a 36-month warranty for the DP840 3BSE028926R1, covering defects in materials and workmanship. Global support includes:
24/7 technical assistance via ABB Ability™ Collaborative Operations Centers
On-site commissioning support by certified engineers
Lifetime firmware updates through Control Builder
SIL recertification services every 5 years
Extended service agreements offer priority replacement (next-business-day) and preventive maintenance audits. ABB guarantees ≥15-year product lifecycle support with traceable calibration to ISO/IEC 17025 standards.
