RKB0043 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKB0043 is a ready-made Ethernet cable belonging to the RKB Control Cables series. It is rated for 3,000,000 bending cycles and supports Sercos III with a Cat5e Ethernet category. The cable features M12 4-pin connectors at both ends and operates in a temperature range from -40 to 70 degrees Celsius.
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Product Description:
The RKB0043 cable is manufactured by Bosch Rexroth Indramat within the RKB Control Cables series. It is supplied as a ready-made Ethernet cable that links drives, controllers, and decentralized I/O in industrial automation systems. Factory termination maintains matched impedance, reduces assembly time, and provides a plug-and-play connection for real-time motion commands and status feedback. The completed assembly also eliminates the need to attach individual connectors during machine installation.
Signal transport follows the deterministic bus protocol supported by Sercos III, and the stranded twisted pairs meet Cat5e transmission requirements for 100 Mbps full-duplex traffic. Both ends carry M12 four-pin connectors with shield continuity through the coupling nuts, enabling secure attachment to servo inverters and other compatible devices. Mechanical endurance reaches 3,000,000 bending cycles in continuous-flex drag-chain service. This duty rating supports continuous operation in linear gantries and multi-axis robots rather than occasional cable repositioning. When installed on mobile axes, the jacket should not be flexed below a dynamic loop radius of 7.5 × D, which helps prevent conductor fatigue and preserve signal attenuation. Cable clamps should not restrict movement or create sharp bends near either connector during repeated axis travel.
For static routing inside control cabinets, the minimum bend radius is 5 × D, permitting tighter routing than on moving axes. The conductor insulation remains stable from -40 °C to an operating ceiling of 70 °C, allowing the same assembly to withstand cold starts and sustained production heat. Long-term storage is permitted down to -50 °C without embrittlement, while the upper storage limit is 70 °C. During storage, the cable should remain within these temperature limits to protect jacket flexibility and conductor insulation. At transitions between fixed trays and dynamic energy chains, routing should provide enough clearance to avoid concentrated mechanical stress. The cable can be used in stationary and continuously moving sections of industrial equipment when the applicable bend radius is maintained.
