Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | NRAI01 |
| Manufacturer | ABB |
| Product Category | 16-Channel Digital Input Module |
| Input Type | Sink/Source (24 VDC) |
| Isolation Voltage | 1500 VAC (channel-to-channel/field) |
| Input Delay | ≤1 ms (On)/≤2 ms (Off) |
| Surge Protection | ±30 kV (IEC 61000-4-5) |
| Power Consumption | 1.8W (typ) @ 24 VDC |
| Operating Temperature | -40°C to +70°C |
| Connection | Removable screw terminal (0.2–2.5 mm²) |
| Compatibility | S800 I/O Baseplates (e.g., TB801/TB811) |
| Certifications | UL 508, CE, IECEx Zone 2 |
| Safety Integrity | SIL 2 (IEC 61508) |
| Diagnostics | Per-channel LED, Open-circuit detection |
ABB NRAI01
Product Introduction
The ABB NRAI01 is a high-density digital input module engineered for ABB’s S800 I/O platform, designed to interface with field devices like limit switches, push buttons, and proximity sensors in industrial automation systems. As a critical component of ABB’s 800xA and Advant Controller ecosystems, this 16-channel module provides galvanic isolation and noise immunity in electrically harsh environments. The ABB NRAI01 supports both sinking and sourcing configurations with universal 24 VDC compatibility, enabling flexible integration without external signal conditioning.
Featuring sub-millisecond response times, this module captures fast state transitions for time-critical applications such as safety interlocks and machine sequencing. Its hot-swappable design allows maintenance without system shutdown, while integrated diagnostics simplify troubleshooting. For industries prioritizing reliability, the ABB NRAI01 delivers SIL 2-certified performance with built-in surge protection exceeding industrial standards.
Core Advantages and Technical Highlights
Robust signal integrity:
1500 VAC reinforced isolation eliminates ground loops and suppresses EMI. ±30 kV surge protection shields against lightning strikes and switching transients. Wetting current (2 mA min) ensures reliable contact sensing even with corroded switches.
High-speed diagnostics:
Per-channel LEDs provide instant visual status. Open-circuit detection alerts via controller diagnostics within 10 ms. Supports live replacement during operation.
Extreme environment resilience:
Operates at -40°C without external heaters. Conformal-coated PCB withstands 95% humidity and corrosive atmospheres. Vibration resistance to 5g (5–150 Hz).
Safety by design:
SIL 2 certification enables deployment in safety instrumented systems (SIS). Dual-wire inputs with cross-monitoring detect field wiring faults.
Engineering efficiency:
Auto-recognition in Control Builder M software. Channel-level configuration (filter time, alarm thresholds).
Typical Application Scenarios
In power distribution substations, the ABB NRAI01 monitors circuit breaker auxiliary contacts, leveraging its 1 ms response time to trigger SCADA alarms during fault conditions. SIL 2 compliance validates its use in transformer protection schemes.
Automotive assembly lines deploy this module for safety door monitoring on robotic cells, where open-circuit detection prevents operation when guards are ajar. The module’s -40°C cold-start capability ensures reliability in unheated facilities.
Water treatment plants utilize the NRAI01 for pump seal failure detection, with surge immunity protecting against VFD-induced transients. Removable terminals accelerate sensor replacement during maintenance shutdowns.
ABB NRAI01
Related Model Recommendations
NRAO01: 16-channel digital output module (complementary pairing)
NRAS01: Analog input module (4-20mA/RTD) for same baseplate
TB801: 8-slot S800 I/O baseplate
CI854: PROFIBUS DP communication interface
PP825: Compact operator panel for local diagnostics
SD822: Industrial SD card for configuration backup
3BSE008516R1: Redundant power supply (24VDC)
UFH001A: Fieldbus coupler for hazardous areas
Installation, Commissioning and Maintenance Instructions
Installation preparation: Mount vertically on S800 baseplate (e.g., TB801). Use shielded twisted-pair cables (Belden 8760) grounded at one end. Maintain 10 cm separation from AC power lines. Verify input voltage range (19–30 VDC) before energizing.
Maintenance suggestions: Check terminal tightness annually (0.5 N·m torque). Clean airflow vents quarterly. Replace modules with >1 million operations. Use Control Builder M’s “Channel Response Test” to validate timing performance. Isolate power before cleaning contacts.
Service and Guarantee Commitment
ABB provides a 36-month warranty for NRAI01, covering material defects and workmanship. Global technical support includes 24/7 hotline access and on-site assistance within 48 hours for critical failures. Lifetime product support guarantees spare parts for 15 years post-discontinuation. All modules undergo 500-hour accelerated aging tests (-40°C to +85°C thermal cycling) and 100% Hi-Pot isolation verification (2.2 kVAC). IECEx certification includes test reports from notified bodies.
