3EX150.6 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 3EX150.6 is part of the System 2005 Controllers series and supports an RS485 interface design with a 9-pin DSUB socket connector. It features a maximum data transfer rate of 2 MBit/s and operates using a master-slave bus access principle. The controller includes an isolated auxiliary supply of 5 V at 200 mA and can manage up to 8 remote masters and 31 remote slaves without a repeater.
Internal Product Review
The 3EX150.6 is a B & R Automation System 2005 controller with an RS485 interface and a 2 MBit/s max transfer rate. Master-slave bus access and support for up to 31 remote slaves make the unit a strong fit for organized, high-confidence distributed control.
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Product Description:
The 3EX150.6 module belongs to the System 2005 Controllers series manufactured by B & R Automation. It serves as a communication interface that attaches directly to a controller rack and propagates fieldbus data to distributed devices in automated machinery and process cells. By combining a dedicated RS485 transceiver with onboard logic, the unit coordinates telegram exchange between the primary CPU and peripheral nodes, enabling deterministic control over remote I/O without local processing overhead.
The interface layer is based on RS485 signaling and routes network traffic through a 9-pin DSUB socket; this connector anchors the shield braid and establishes the differential pair required for noise-immune communication. Cabling must use a shielded, twisted pair so that reflections and common-mode voltages remain within tolerance for the physical bus. When operated at the maximum rate of 2 MBit/s, external termination resistors are required because the device relies on external bus termination to control line impedance. The board consumes 5.5 W max from the 5 V backplane supply, so a power budget review is necessary when multiple modules share the same rail. Supported baud selections of 100, 181, 500, 1000, and 2000 kBit/s are configured by software to match network length and required update times. Direct bus connection keeps signal routing simple and avoids the latency introduced by repeaters in star or ring layouts.
Access arbitration follows the master-slave principle; the primary controller initiates telegrams, while slaves respond only to directed queries. One segment can host up to 8 remote masters and as many as 31 slaves before a repeater becomes necessary, allowing segmented expansion without violating loading rules. An isolated auxiliary output of 5 V / 200 mA is provided for external transducers so that sensor power can be delivered without coupling field noise back into the logic plane. This arrangement supports orderly communication across the segment and helps maintain predictable message timing.
