8AC140.61-2 B & R Automation
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The B & R Automation 8AC140.61-2 is part of the 8AC Powerlink Modules series and features a 100 MHz x86 Intel compatible processor with ARNC0 CPU type. It is equipped with 16 MB of DRAM, 32 kB of SRAM, a Compact Flash application memory, and includes CAN, Ethernet, RS232, and Profibus DP slave interfaces.
Internal Product Review
The 8AC140.61-2 is a B & R Automation Powerlink module built around an x86 Intel compatible processor and a 100 MHz clock rate. Compact Flash application memory and 16 MB DRAM support dependable program handling in motion and networked control tasks. A dedicated PROFIBUS DP slave port adds useful fieldbus integration, making this module a capable control platform.
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Product Description:
The 8AC140.61-2 is a communication and control module built by B&R Automation for the 8AC Powerlink Modules series. Designed as an interface node inside distributed machine architectures, it links higher-level PLCs with servo drives, sensors, and I/O stations over the deterministic Ethernet-based Powerlink network. By integrating fieldbus, serial, and Ethernet channels in one compact card, it reduces cabinet space while allowing synchronized data exchange required for coordinated motion, process monitoring, and safety interlocks in industrial automation systems.
Its processing core is rated at a 100 MHz clock rate, giving the module deterministic cycle times for time-critical Powerlink frames. The embedded DRAM capacity of 16 MB holds the real-time operating system, buffering network variables without page swapping. A small but fast 32 kB SRAM block stores high-frequency I/O flags that must survive task-switching delays. Program execution is handled by the ARNC0 CPU, a reduced-instruction controller optimized for cyclic data exchange. The module has 1 on-board Ethernet port, which provides the physical Powerlink medium and also supports standard TCP/IP diagnostics when the network is in idle mode.
Non-volatile program and recipe data reside on Compact Flash, which keeps retained information separate from working memory. Field connectivity is widened by a 1 CAN interface, allowing the module to pass Powerlink data to legacy CANopen actuators. For factory networks that rely on hierarchical bus topologies, one PROFIBUS DP slave port enables cyclic data mapping from a central PLC, while the single RS232 channel offers service access for diagnostics. This combination allows the 8AC140.61-2 to bridge existing serial devices and deterministic Ethernet domains.
