Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | ABB AX722F 3BDH000377R0001 |
| Manufacturer | ABB |
| Product Category | SIL 3 Certified Digital Input Module |
| Safety Standard | IEC 61508 SIL 3, IEC 61131-2 Type 1 |
| Input Channels | 16 channels (dual-redundant per group of 8) |
| Input Type | 24V DC Sink/Source (configurable) |
| Input Voltage Range | 19-30V DC (ON), 0-5V DC (OFF) |
| Response Time | ≤1 ms (filter disabled) |
| Diagnostic Coverage | >99% (per IEC 61508) |
| Isolation Voltage | 500V AC (channel-to-system) |
| Communication Interface | S800 I/O Bus (AC 800M integration) |
| Operating Temperature | -40°C to +70°C |
| MTBF | 350,000 hours (IEC 61709) |
| Certifications | TÜV, ATEX II 3G, DNV-GL, cFMus |
ABB AX722F 3BDH000377R0001
Product Introduction
The ABB AX722F 3BDH000377R0001 is a safety-certified digital input module designed for ABB’s AC 800M High Integrity safety system. Engineered for critical applications requiring the highest safety integrity level (SIL 3), this module processes signals from emergency stops, safety gates, and fire/gas detectors with zero compromise on reliability. As part of ABB’s S800 I/O family, the ABB AX722F 3BDH000377R0001 features dual-channel redundancy with discrepancy monitoring for each input pair, enabling it to detect dangerous failures like stuck contacts or wiring shorts while maintaining process continuity.
Integrated with ABB AC 800M HI controllers, this module executes safety functions with ≤1 ms response times – crucial for preventing catastrophic events in hazardous processes. Its TÜV-certified design includes continuous hardware self-tests and automatic fault reporting through Control Builder Safe. The ABB AX722F 3BDH000377R0001 forms the frontline defense in safety instrumented systems where human lives and environmental protection depend on fail-safe operation.
Core Advantages and Technical Highlights
Ultimate Safety Integrity: Certified for SIL 3 applications per IEC 61508 with >99% diagnostic coverage. Dual independent input circuits per channel with configurable discrepancy time (1-500 ms) detect contact welding or asynchronous signals. Faults trigger predefined safe states without spurious trips.
Sub-Millisecond Response: ≤1 ms reaction time enables the ABB AX722F 3BDH000377R0001 to outpace conventional safety modules by 5x. Time-stamped event logging with 100 μs resolution provides forensic data for incident analysis.
Advanced Diagnostics: Continuous monitoring detects:
Open circuits (wire break)
Short circuits to ground/24V
Cross-channel faults
Module internal failures
Dual-color LEDs (green/red) provide per-channel health status at the module faceplate.
Flexible Field Connectivity: Software-configurable per channel group for sinking (NPN) or sourcing (PNP) sensors. Wide voltage tolerance (19-30V DC) accommodates unstable power networks. Integrated surge protection withstands 1kV transients.
Cybersecurity Fortification: Hardware-enforced read-only access for safety variables. Secure boot with cryptographic signature verification per IEC 62443-4-2. Unauthorized configuration changes trigger controller alarms.
Extreme Environment Operation: -40°C cold-start capability without heaters. Conformal-coated PCB resists corrosive atmospheres in chemical plants. DNV-GL certification validates performance in offshore vibration conditions.
Typical Application Scenarios
Oil Refinery SIS: Processes emergency shutdown commands from fire/gas detectors. SIL 3 certification meets IEC 61511 requirements for hydrocarbon processing units.
Pharmaceutical Sterilizers: Monitors door interlocks and pressure traps. ≤1 ms response prevents door opening during 140°C sterilization cycles.
Power Plant Burner Management: Validates flame scanner signals and fuel valve positions. Dual-channel inputs detect faulty sensors before unsafe burner starts.
Offshore HIPPS Systems: Interfaces subsea pressure transmitters. DNV-GL compliance ensures reliability in sub-zero North Sea environments.
Automotive Paint Robots: Safeguards personnel entry zones. ATEX certification allows installation in Zone 2 explosive atmospheres.
ABB AX722F 3BDH000377R0001
Related Model Recommendations
ABB AX723F: SIL 3 Digital Output module; pairs with AX722F for safety actuation.
ABB AI725F: SIL 3 Analog Input module; monitors critical process variables.
ABB PM803F: Safety controller; processes AX722F inputs for SIL 3 logic.
ABB TA521: Termination board; provides fused field connection.
ABB CI871: PROFIBUS gateway; integrates non-safety signals.
ABB SD833: Surge protector; enhances lightning protection for field wiring.
Installation, Commissioning and Maintenance Instructions
Installation Preparation: Mount in S800 rack with safety backplane (e.g., SA801F). Segregate safety/non-safety wiring per IEC 60204-1. Use shielded cables (≥0.5 mm²) with separate conduits. Verify external power supply meets SELV/PELV requirements. Apply safety lockout during installation.
Maintenance Suggestions:
Quarterly: Validate response time using certified test equipment
Annually: Perform forced fault injection via Control Builder Safe
Replace if DIAG LED flashes red continuously
Verify discrepancy time settings after maintenance
Calibrate field sensors concurrently with module tests
Maintain cybersecurity logs for configuration changes
Service and Guarantee Commitment
ABB provides a 36-month warranty with SIL 3 functional safety guarantee. Comprehensive support includes:
• TÜV-certified safety validation reports (FMEDA)
• 24/7 critical failure response within 4 hours
• On-site SIL verification audits
• Lifetime firmware updates with cybersecurity patches
• Spare parts availability for 20+ years
• Training programs for IEC 61511 compliance
All modules undergo 168-hour burn-in testing with full diagnostic validation. ATEX/IECEx certification documents provided upon delivery.
