31F761.9 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 31F761.9 belongs to the 4P Power Panels series and has a total power consumption of 1.35 W, with a 3.3 Vdc power draw of 0.15 W and a 5 Vdc draw of 1.2 W. The unit features a 9-pin male DSUB If1 connector, one RS232 port, and one Profibus port, providing If1 to If2 isolation, and carries a protection rating of IP20.
Internal Product Review
The 31F761.9 from the 4P Power Panels series by B & R Automation features a 9-pin male DSUB connector with a maximum cable distance of 900 m, making it suitable for extended industrial applications. With a total power consumption of 1.35 W and IP20 protection, this unit is efficient and well-suited for control cabinets. Emphasis on the 12 Mbit/s transfer rate highlights its strong data communication capability.
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Product Description:
The 31F761.9 panel is produced by B & R Automation as part of the 4P Power Panels series. It serves as a compact HMI and communication gateway between PLC logic and field devices on industrial networks. In a control cabinet, it supports operator visualization, protocol conversion, and diagnostic access for routine machine control tasks onsite.
The electronics draw 0.15 W from the 3.3 V rail and 1.2 W from the 5 V rail, keeping total demand below 1.35 W. That low power requirement helps limit cabinet heat buildup and reduces the load placed on the supporting supply. Field wiring lands on a front-mounted 9-pin male DSUB assigned to IF1, which preserves compatibility with existing serial cables. An isolated IF2 channel reaches 12 Mbit/s, allowing Profibus DP traffic to move quickly without burdening the controller.
For distributed layouts, the IF1 line can extend up to 900 m when suitable cabling is used. The IP20 housing is intended for clean, dry cabinets and needs additional enclosure protection in harsher environments. Communications include one dedicated Profibus interface and a separate RS232 service port, so fieldbus exchange and local diagnostics can occur at the same time. Galvanic isolation separates the PLC core from IF2, while IF1 shares a common reference to keep the design compact.
Wake Industrial can arrange same-day shipping for urgent replacement needs. Each purchase is backed by a 1-year warranty. Quotations remain valid for 30 days, and the chat tool available on the website can answer questions about details or fault codes.
