Product Description:

The CFL01.1-P1 is a communication interface module from Bosch Rexroth Indramat and belongs to the CFL Modules series. Within an automation rack, it provides the electrical link between a serial bus and the controller, allowing distributed I/O stations or drives to exchange real-time data with the CPU. Its compact format helps reduce wiring congestion in crowded cabinets, and the direct bus connection supports stable data transfer between separated machine sections. This arrangement lets the controller receive device status and send control data without requiring each field device to be wired individually to the central rack.

The module terminates the bus through a 9-pin D-Sub female connector, and the pin assignment routes differential transmit, receive, control, and reference signals to dedicated contacts. Cabling must follow the Type A (EN 50170-8-2) profile and use shielded twisted-pair cable so common-mode noise is reduced during operation. During operation, the logic rails draw 500 mA from the 3.3 V backplane, while total internal dissipation remains at 1.65 W. This power demand and heat loss must be considered when sizing the rack supply and airflow path. Two front LEDs labeled Stat and Bus show module diagnostics and network activity, and the field cable needs an outer conductor diameter greater than 0.64 mm for adequate crimp strength at the connector.

Signal quality over distance depends on several transmission limits. At 12 Mbit/s, the maximum segment length is 100 m, because longer runs can introduce propagation delay and timing errors between nodes. The copper pair may introduce loop resistance of ≤ 110 ohms/km and distributed capacitance of ≤ 30 pF/m, helping the transceivers maintain clean signal edges across the line. The conductors also need a cross-section of more than 0.34 mm² so voltage drop stays within logic thresholds when multiple nodes share the same communication segment.