Description

The ABB LWN2660-6EG (also identified by part number 3BHL000986P7002) is a high-integrity, compact programmable logic controller (PLC) CPU module belonging to ABB’s AC500-eCo series. Designed for cost-sensitive yet reliable automation applications, the LWN2660-6EG delivers efficient control performance in a space-saving footprint, making it ideal for machine builders, OEMs, and system integrators across diverse industrial sectors. As a member of the scalable AC500 platform, this module combines ease of use with robust functionality, supporting both basic logic control and more complex tasks such as motion coordination, data logging, and remote monitoring.

Engineered for versatility, the ABB LWN2660-6EG features integrated communication ports including Ethernet (10/100 Mbps) and RS-485, enabling seamless connectivity with HMIs, drives, SCADA systems, and other controllers using standard protocols like Modbus TCP/RTU and CANopen. It operates within ABB’s proven automation ecosystem, fully compatible with Automation Builder engineering software and capable of integration into larger systems via PLCnext Technology, allowing for open development environments and future-proofing.

The LWN2660-6EG is built to withstand demanding industrial conditions, offering wide operating temperature ranges, high noise immunity, and resistance to vibration and shock. Its modular design allows expansion with additional I/O modules, communication interfaces, and function units, providing flexibility for application growth. With CE, UL, and IEC 61131-3 compliance, the ABB LWN2660-6EG (3BHL000986P7002) ensures safe, certified operation in global installations—from municipal water pumps to packaging lines and building management systems.

LWN2660-6EG 3BHL000986P7002 ABB

Technical Specifications

Main Features and Advantages

The ABB LWN2660-6EG (3BHL000986P7002) offers an optimal balance of performance, reliability, and affordability, making it a preferred choice for mid-range automation tasks. Its integrated dual communication interfaces eliminate the need for additional modules, reducing system complexity and cost. The Ethernet port enables fast configuration, remote diagnostics, and integration into Industry 4.0 frameworks, while the RS-485 interface supports legacy field devices and distributed I/O networks.

One of the key advantages of the LWN2660-6EG is its compatibility with ABB’s Automation Builder, a unified engineering environment that streamlines hardware configuration, logic programming, HMI design, and network setup. This reduces engineering time and minimizes errors during commissioning. Additionally, its support for PLCnext Technology opens the door to advanced applications using C++, Python, or web-based services—ideal for users seeking innovation without sacrificing stability.

The LWN2660-6EG also excels in scalability. It can be expanded with up to three additional I/O modules, supporting digital, analog, and specialty inputs/outputs for flexible system design. Whether monitoring tank levels in a wastewater plant or controlling conveyor sequences in a factory, the ABB LWN2660-6EG adapts effortlessly.

Designed for longevity and resilience, the module features conformal coating on critical circuitry, protecting against moisture, dust, and corrosive atmospheres. Its wide temperature range ensures stable operation in unheated enclosures or outdoor cabinets. With no moving parts and solid-state reliability, the LWN2660-6EG delivers years of uninterrupted service—making it not just a controller, but a long-term investment in operational efficiency.

Application Field

The ABB LWN2660-6EG (3BHL000986P7002) is widely deployed in applications where dependable, compact control is essential. In water and wastewater treatment plants, it automates pump control, level monitoring, chemical dosing, and filtration cycles, ensuring regulatory compliance and energy efficiency. Its Modbus capabilities make it ideal for integrating with flow meters, pressure transducers, and telemetry systems.

In HVAC and building automation, the LWN2660-6EG manages chiller sequencing, fan control, temperature regulation, and alarm handling across commercial and industrial facilities. Its small size allows installation in tight electrical panels, while its communication flexibility supports integration with BMS (Building Management Systems).

For packaging and material handling equipment, the module provides precise timing, motor control, and fault detection for conveyors, fillers, and labeling machines. Its fast scan times ensure smooth coordination between sensors and actuators, minimizing downtime.

Other common applications include:

• OEM machinery control(e.g., test rigs, assembly stations)
• Renewable energy systems(solar tracking, battery management)
• Food and beverage processing(temperature control, batching)
• Remote monitoring and telemetry(via GSM gateways)

With its SIL 2 capability (when used in safety-related architectures) and robust design, the LWN2660-6EG is trusted in environments ranging from offshore platforms to desert pumping stations.

LWN2660-6EG 3BHL000986P7002 ABB

Related Products

• ABB DO620– Digital Output Module (16-channel relay), compatible with LWN2660-6EG expansion.
• ABB DI620– Digital Input Module (24-channel, 24 VDC), for discrete signal acquisition.
• ABB AI620– Analog Input Module (8-channel, 4–20 mA / 0–10 V), for process variable monitoring.
• ABB AC500 Base Unit– Chassis for mounting CPU and I/O modules.
• ABB CI531– Communication Interface Module (Profibus DP Slave), expands connectivity options.
• ABB Automation Builder– Configuration and programming software for AC500 series.
• ABB LWC510– Smaller CPU variant in the AC500-eCo family, suitable for simpler applications.
• ABB CP600– HMI Panel designed to work seamlessly with AC500 controllers.

Installation and Maintenance

Pre-installation Preparation: Before installing the ABB LWN2660-6EG, ensure the DIN rail is securely mounted and properly grounded. Verify that the 24 VDC power supply is clean, stable, and within the 18–30 V range. Use shielded cables for communication lines and route them away from high-voltage conductors to prevent interference. Handle the module with ESD precautions—avoid touching connectors or PCB traces. Confirm firmware version compatibility with your project file in Automation Builder before downloading.

Installation Steps:

1. Snap the base unit onto the DIN rail.
2. Insert theLWN2660-6EG firmly into the base until it clicks.
3. Connect power terminals (24 VDC and GND).
4. Wire communication ports (Ethernet and/or RS-485).
5. Power up and verify LED status (RUN, ERROR, COMM indicators).
6. Download program via Automation Builder using Ethernet or USB adapter.

Maintenance Recommendations: Regularly check LED status for signs of faults or communication issues. Monitor system logs for unexpected reboots or protocol timeouts. Perform periodic backup of the program and configuration. Clean the cabinet interior to prevent dust accumulation. Inspect terminal screws for tightness every 6–12 months. Update firmware only with versions approved by ABB to maintain system integrity. The LWN2660-6EG requires minimal maintenance but benefits from scheduled health checks to ensure peak performance.