7IF321 B & R Automation
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The B & R Automation 7IF321 interface module is part of the System 2003 Controllers series and features one RS485/RS422 interface with a 9-pin DSUB socket. It supports a maximum baud rate of 115.2 kBaud, a cable distance up to 1200 meters without a repeater, and operates with a power consumption of 1.4 W. This screw-in module has IP20 protection and operates in temperatures from 0 to 60 degrees Celsius horizontally.
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Product Description:
B & R Automation manufactures the 7IF321 for the System 2003 Controllers series. The module is a screw-in communication card that provides one serial channel so a base CPU can link with decentralized I/O, drives, and human-machine interfaces inside automated equipment. By inserting this board into the controller backplane, the system gains differential serial capability without using external rack space or a separate power source. It converts logic-level signals from the processor into balanced lines used on factory networks, enabling reliable data transfer over longer distances. This arrangement keeps the serial interface inside the controller assembly and avoids the need for an external signal converter.
The communication side is presented on a 9-pin DSUB socket, and the electronics comply with the RS485/RS422 standard, supporting half- or full-duplex cabling. Frame format can be set to 7 / 8 data bits with 1 or 2 stop bits to match legacy field devices. The port transmits at rates up to 115.2 kBaud and remains stable across long twisted-pair runs. Without a repeater, the differential signaling sustains communication over 1200 m of cable, which reduces the need for intermediate hardware on large machines. Galvanic separation is maintained by the internal PLC-to-IF1 isolation circuit, and the module supports multi-station network topologies.
Electrical demand stays low, and the board draws only 1.4 W from the controller’s internal supply. Protection is rated at IP20, making the card suitable for installation inside closed control cabinets. When mounted horizontally, the unit operates between 0°C to +60°C; in vertical orientations, the safe operating range is 0°C to +50°C. A screw-in module frame secures the card against vibration during production cycles, and the housing tolerates storage temperatures from −25 °C to +70 °C without degradation. The enclosed installation also helps protect the connector and electronics from accidental contact during normal operation.
Frequently Asked Questions about 7IF321:
Q: What type of connector is provided on the 7IF321 module?
A: This module uses a 9-pin DSUB socket for its connector.
Q: How many data bits can be configured on the 7IF321 module?
A: The 7IF321 operates with either 7 or 8 data bits for serial communication.
Q: What interface types are available on the 7IF321 module?
A: It supports RS485 and RS422 interface types for serial data transmission.
Q: What is the maximum baud rate supported by the 7IF321 module?
A: The supported maximum baud rate for the 7IF321 is 115.2 kBaud.
Q: What is the maximum cable distance supported by the 7IF321 module without a repeater?
A: The 7IF321 module allows cable distances up to 1200 meters without a repeater.
