B&R 3AT660.6 PLC Module from Automation Panel Series

The B&R 3AT660.6 is a powerful programmable logic controller (PLC) module that belongs to the Automation Panel series, specifically designed as an integrated CPU and touch screen panel for machine-level automation. It combines a high-performance Intel Atom processor, onboard memory, and real-time communication ports in a single compact unit. The 3AT660.6 is fully compatible with B&R’s X20 I/O system and Automation Studio software environment, making it a central component for distributed control architectures.

Processor and Memory

The 3AT660.6 features an Intel Atom E3827 dual-core processor running at 1.75 GHz with 1 MB L2 cache. It includes 1 GB of DDR3L RAM (soldered, non-expandable) and 4 GB of eMMC flash storage for the operating system and user applications. An additional slot accepts a CFast card (SATA 3.0) for extended data logging or recipe storage. The real-time clock (RTC) is backed by a lithium battery with a life of 5 years. The system supports B&R’s runtime kernel (Automation Runtime) with deterministic cycle times down to 400 microseconds.

Display and Human Interface

While the module number 3AT660.6 refers to the controller itself, it is typically part of a panel solution with a 15-inch TFT display (1024x768 resolution, 500 cd/m² brightness). The projected capacitive touchscreen supports multi-touch (2-point) and glove operation. The display interface is via internal LVDS; the controller provides backlight control (PWM dimmable) and ambient light sensor input. For operator feedback, three configurable LEDs (red, yellow, green) and a piezo buzzer are integrated.

Communication Interfaces

The 3AT660.6 includes a wide range of onboard industrial communication ports:

• 2 x Ethernet 10/100/1000 (RJ45) with integrated switch, supporting POWERLINK real-time, Modbus TCP, and OPC UA.

• 2 x USB 2.0 host ports (Type A) for flash drives or keyboard/mouse.

• 1 x USB 3.0 device port (Type B) for programming and firmware update.

• 1 x RS-232/422/485 (selectable via DIP switches) for serial devices.

• 1 x CAN interface (ISO 11898) with 5 kV isolation.

• 1 x X2X Link master port (B&R proprietary fieldbus) for connecting up to 253 X20 or X67 I/O modules.

X20 I/O Expansion

Through the X2X Link port, the 3AT660.6 can control a distributed I/O network with cycle times as low as 1 ms. The module supports up to 64 physical X20 stations, covering digital and analog input/output, temperature sensing (PT100, thermocouple), counter modules (1 MHz), and motion control interfaces (ACOPOS drive over POWERLINK). The CPU automatically maps all I/O variables in Automation Studio’s hardware tree.

Power Supply and Environmental Ratings

Operating voltage: 24 VDC (18 to 32 VDC, including ripple). Typical power consumption: 25 W (with backlight on maximum). The module has internal reverse polarity protection and a 3.15 A slow-blow fuse (user replaceable). Operating temperature: -20°C to +60°C (derate 3% per °C above 50°C). Storage: -30°C to +80°C. Protection class: front IP65 (when panel mounted), rear IP20. Humidity: 5% to 95% non-condensing. Shock resistance: 15 g / 11 ms half-sine. Vibration: 2 g (10–500 Hz).

Software and Programming

Programming is done with B&R Automation Studio (version 4.8 or later). Supported IEC 61131-3 languages: ladder diagram, structured text, function block diagram, sequential function chart, and instruction list. The controller also supports C/C++ for high-performance tasks and mapp technology components (pre-built libraries for robotics, CNC, and HVAC). The integrated web server provides diagnostics, data visualization, and remote access via HTTPS. Real-time data can be exchanged with cloud platforms via MQTT.

Diagnostics and Maintenance

The 3AT660.6 features a 7-segment status display on the rear for boot stage and error codes. Green LED indicates POWER, yellow LED indicates system ready, red LED indicates major fault. All I/O errors are captured in the diagnostic buffer (circular buffer, 1000 entries). Battery low and temperature warnings are displayed in Automation Studio. The controller supports remote firmware updates over Ethernet without power cycle. Mean time between failures (MTBF) is calculated at 150,000 hours at 40°C.

Typical Applications

Common deployments include packaging machinery (vertical form fill seal), printing presses, textile machines, assembly stations, and laboratory automation. The integrated display and real-time control eliminate separate HMI and PLC, reducing cabinet space. The 3AT660.6 is also used in mobile equipment (with vibration isolation) for agricultural or construction vehicles, thanks to its extended temperature range.

Standards and Certifications

The module meets CE (EN 61131-2), UL 61010-1, cUL, and ATEX Zone 2 (IECEx). RoHS and REACH compliant. For marine applications, it has DNV GL type approval (temperature and humidity). The unit is designed for panel mounting with a clamping mechanism; cutout dimensions 383 mm x 279 mm. The rear profile depth is 70 mm. Order code: 3AT660.6. Documentation: B&R user's manual MAAP3.