3IF671.9 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 3IF671.9 is part of the System 2005 Controllers series and features a range of interfaces including RS232, RS485/RS422, and CAN. The device supports CAN communication over distances up to 1,000 meters with selectable baud rates, and uses a 4-pin multipoint connector for CAN. It offers a maximum power consumption of 2 W and provides isolation for RS485/422 and CAN lines.
Internal Product Review
The 3IF671.9 is a B & R Automation System 2005 controller communication module with RS232, RS485/RS422, and CAN interfaces. Isolated RS485/RS422 and CAN channels pair well with CAN reach up to 1,000 m, supporting clean and dependable network integration. Max power consumption of 2 W is a strong advantage for efficient control system design.
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Product Description:
The 3IF671.9 communication interface card is produced by B&R Automation for the System 2005 Controllers series. Installed on the controller backplane, the card equips the base CPU with asynchronous serial and CAN lines, enabling the PLC to link with drives, operator panels, and distributed sensors across an automated cell. By opening these channels, it supports integration of legacy point-to-point devices and modern fieldbus nodes within the same control architecture.
The module draws a maximum of 2 W from the backplane supply, so it imposes only a minor load on power budgeting. It exposes 1x RS232, 1x RS485/RS422, and 1x CAN interfaces, giving three protocol layers for programming, service, and peer-to-peer exchange. Both serial channels are handled by an ST16C650 UART that provides 32 bytes TX/RX hardware FIFOs to smooth traffic bursts. User-selectable data rates reach 115.2 kBaud, which is adequate for configuration tools and barcode scanners. The RS232 port is presented on a 9-pin D-sub plug, while the differential RS485/422 line uses a 9-pin D-sub socket. RS232 wiring can extend to 15 m when operated at 19.2 kBaud, and electrical isolation is provided on the RS485/422 and CAN circuits, whereas the RS232 channel shares logic ground.
On the CAN side, message processing is performed by an 82527 stand-alone controller that supports full-featured error handling. Network wiring enters through a 4-pin multipoint connector and can reach 1,000 m when the bus is set to 50 kbit/s. The profile also supports 250 kbit/s for segments up to 200 m and 500 kbit/s on lines shorter than 60 m, covering most plant layouts. Correct impedance on the RS485 segment is established with an external T-connector that houses the termination resistors without requiring extra boards. This arrangement allows the same card to support both compact machines and widely distributed stations.
