Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | ABB LWN2660-6 |
| Manufacturer | ABB |
| Product Category | PROFIBUS DP Communication Module |
| Interface Standard | PROFIBUS DP-V0/V1 |
| Data Transfer Rate | 9.6 kbps – 12 Mbps (auto-negotiating) |
| Port Configuration | 2x independent PROFIBUS ports (A/B) |
| Redundancy Support | Media redundancy (MRP) |
| Electrical Isolation | 500 V AC (field-to-system) |
| Termination | Integrated 220Ω resistor (software-selectable) |
| HART Passthrough | Yes (via PROFIBUS PA segment couplers) |
| Operating Voltage | 24 V DC ±10% |
| Power Consumption | 2.1 W (typical) |
| Operating Temperature | -25°C to +70°C |
| Certifications | UL, CE, ATEX Zone 2, SIL 2 (IEC 61508) |
| Compatible Systems | ABB Symphony® Plus, 800xA |
ABB LWN2660-6
Product Introduction
The ABB LWN2660-6 is a high-performance PROFIBUS DP interface module engineered for ABB’s S800 I/O platform, delivering robust fieldbus connectivity in mission-critical automation systems. Designed as a slave interface for Symphony® Plus and 800xA DCS architectures, the ABB LWN2660-6 enables seamless integration of PROFIBUS DP devices – including motor starters, flow meters, and remote I/O – into ABB’s control environment. With dual independent PROFIBUS ports supporting simultaneous operation, this module provides exceptional network flexibility for complex topologies.
Featuring auto-baud detection and advanced diagnostics, the ABB LWN2660-6 simplifies commissioning while maintaining deterministic data exchange with cycle times <100ms for 128 I/O points. Its integrated HART passthrough capability extends diagnostic visibility to smart field instruments via PROFIBUS PA segment couplers. The ABB LWN2660-6 is particularly valuable in brownfield modernization projects, acting as a protocol bridge to incorporate existing PROFIBUS assets into ABB’s latest control platforms without rewiring.
Core Advantages and Technical Highlights
Dual-Port Architecture: Unlike conventional single-port modules, the ABB LWN2660-6 features two electrically isolated PROFIBUS interfaces. This enables daisy-chaining of devices without external repeaters and supports redundant ring topologies via Media Redundancy Protocol (MRP).
Enhanced Noise Immunity: Triple-shielded internal design with galvanic isolation (500V AC) eliminates ground loops. Advanced signal conditioning maintains BER <10⁻⁹ even in high-EMI environments like switchyards or VFD rooms.
Diagnostic Depth: Real-time monitoring of telegram error rates, station status, and signal quality. Integrated “PROFIBUS Sniffer” mode captures network traffic for troubleshooting without additional hardware.
Safety-Critical Design: SIL 2-certified firmware implements watchdog timers and protocol checksums. Hardware-based short-circuit protection (30V/100mA limit) prevents field wiring faults from disrupting the S800 backplane.
Operational Efficiency: Automatic device replacement recognition – when swapping identical field devices, the ABB LWN2660-6 automatically restores parameters via GSD files stored in controller memory.
Environmental Robustness: Conformal-coated PCB withstands 95% non-condensing humidity. Vibration-resistant connectors rated for 2g continuous operation.
Typical Application Scenarios
In cement plant rotary kiln control, the ABB LWN2660-6 integrates motor drives and temperature sensors across 500m+ distances. Its dual ports create redundant rings around the kiln, maintaining control during cable damage events. The module’s -25°C rating ensures reliability in unheated areas like raw mills.
For automotive paint shops, the ABB LWN2660-6 connects robotic color mixers via PROFIBUS while its HART passthrough monitors valve positioners in solvent delivery systems. ATEX certification allows installation in Zone 2 areas where flammable vapors exist.
In offshore compressor stations, the module’s corrosion-resistant housing (ISO 12944 C5-M) withstands salt spray. MRP redundancy maintains safety system communications during lightning storms, with <200ms switchover time preventing process trips.
ABB LWN2660-6
Related Model Recommendations
ABB LWN2660-8: Enhanced version with PROFINET support
ABB CI854: PROFIBUS DP Master for AC 800M controllers
ABB SA801F: Fieldbus base unit for LWN2660-6 mounting
ABB TA521: Termination unit with surge protection
ABB SD821: 16-channel digital input module for same station
ABB COM620: Cybersecurity gateway for network segmentation
ABB 3BSE020510R1: PROFIBUS PA segment coupler for HART integration
ABB DSTD190: Diagnostic tool for LWN2660-6 network analysis
Installation, Commissioning and Maintenance Instructions
Installation Preparation: Verify DIN rail mounting surface flatness (±0.5mm/m). Use PROFIBUS-certified Type A cables (shielded twisted pair). Ground shield at both ends for MRP rings. Maintain 30mm clearance from high-voltage cables. Pre-load GSD files in Control Builder before power-up.
Maintenance Suggestions: Quarterly inspect signal quality metrics in diagnostics. Annually clean connectors with fiber-free wipe and isopropyl alcohol. Monitor “Telegram Error Rate” – sustained >1% indicates cable issues. Replace modules showing amber “SF” LED for >24 hours. For firmware updates: 1) Disable redundancy, 2) Update via USB service port, 3) Verify checksum. Store configuration backups on controller SD card.
Service and Guarantee Commitment
ABB provides a 36-month warranty for the LWN2660-6, covering all manufacturing defects. Our global support includes:
24/7 technical assistance through ABB’s ControlCare hotline
Firmware updates with backward compatibility assurance
On-site diagnostics within 8 business hours (critical sites)
Extended product lifecycle commitment until 2038
Complimentary network configuration audits
Calibration services traceable to NIST standards
All modules undergo 72-hour burn-in testing at 85% relative humidity and 65°C ambient temperature prior to shipment. SIL 2 certification includes TÜV Rheinland validation reports.
