3IF791.9 B & R Automation
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The B & R Automation 3IF791.9 is an aPCI interface module within the System 2005 Controllers series. It serves as an X2X Link master fieldbus module and offers one X2X master interface with a maximum station distance of 100 meters. The module uses a 4-pin male multipoint connector and features an LED data transfer indicator, with total power consumption of 1.19 W.
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Product Description:
The 3IF791.9 interface card is produced by B&R Automation for the System 2005 Controllers series. Installed in the controller's aPCI backplane, it functions as a dedicated master for the vendor's deterministic fieldbus, enabling the CPU to supervise distributed I/O without an external gateway. This module adds a real-time communication path required in industrial automation cells where coordinated drives, sensors, and actuators share process data at fixed scan times. It is suited for control systems that need consistent data exchange between local processing hardware and remote machine devices.
The card is an aPCI interface module and includes a built-in X2X Link master that manages one downstream segment. Field wiring for that segment uses a 4-pin male multipoint connector, and telegram activity is indicated by an integrated LED so data flow can be checked visually. The PLC interface on the CPU side is galvanically isolated, which reduces ground-loop interference between the controller and field devices. The module has an IP20 housing, so it is intended for installation inside a closed cabinet. Only one X2X master interface is present, and the module therefore occupies a single slot in the station map. This arrangement keeps the fieldbus function inside the controller platform without requiring a separate communication unit.
The card draws 1.19 W in total. That input is split between 0.43 W on the 3.3 V rail and 0.76 W on the 5 V rail, which shows how the electrical load is distributed across the controller supplies. An X2X segment connected to this master may extend up to 100 m from node to node, allowing cabinets to be spaced along a production line while maintaining communication timing. That reach supports distributed machine layouts with remote I/O placed near sensors and actuators instead of beside the CPU. Galvanic isolation also helps limit the transfer of differential noise into the CPU backplane when the fieldbus is routed across that distance.
Frequently Asked Questions about 3IF791.9 :
Q: What connector style is used on the 3IF791.9 interface module?
A: The connector style for this model is a 4-pin male multipoint.
Q: How does the 3IF791.9 indicate data transfer activity?
A: This module features an LED data transfer indicator for visual status updates.
Q: What fieldbus communication protocol is supported by the 3IF791.9?
A: The 3IF791.9 supports X2X Link master fieldbus communication.
Q: What is the total power consumption of the 3IF791.9 module?
A: This interface module has a total power consumption of 1.19 W.
Q: What is the maximum supported station distance for the 3IF791.9?
A: It supports a maximum station distance of 100 meters over the X2X Link.
