Product Description:

B&R Automation produced the 7IF371.70-1 for the System 2003 Controllers series. The module is a single-channel CAN communication interface that installs next to the CPU to let the control system exchange real-time data with remote actuators and sensors. By translating internal controller messages into standard CAN frames, it supports deterministic fieldbus traffic required for coordinated motion, safety interlocking, and machine status reporting on industrial equipment.

The interface complies with the CAN physical layer, so arbitration, error handling, and bit timing follow the ISO 11898 standard. Its selectable bit rate can reach 500 kBit/sec, allowing rapid update cycles when the network length is short, while still supporting a maximum bus length of 1000 m at lower speeds. Electrical connection is made through a 9-pin D-Type (M) plug that carries differential data lines and a device power reference, simplifying daisy-chain cabling between nodes. During operation, the module draws a maximum of 2.5 W, which should be considered when sizing the controller backplane supply and cabinet thermal load.

As a screw-in module, the 7IF371.70-1 slides into the rack and is secured with captive screws, helping maintain signal integrity under vibration. The controller backplane detects the module through its slot coding and only permits installation in the CP Interface, Slots 1, 2, 3, which helps prevent wiring errors. With exactly 1 CAN channel available, configuration remains straightforward because network parameters are set once and the embedded microcontroller handles message acceptance filtering. The device operates in Frame Driver Only mode, meaning the host CPU constructs each CAN frame while the module manages bit-level serialization and acknowledgment. This arrangement provides flexibility for specialized higher-layer protocols.