RH2-021DBB Bosch Rexroth Indramat

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The Bosch Rexroth Indramat RH2-021DBB is part of the RH2 Encoder Cables series and is designed as a basic hybrid cable with a PUR jacket and orange color. This second generation cable has a cross section of 1.5 mm², M23-Hybrid plug size, and can handle a power wire rated voltage of 600/1000 V and signal wire rated voltage of 450/750 V. Its outer diameter is 13.0 mm and it withstands maximum conductor temperatures of 90 °C

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Product Description:

The RH2-021DBB is an encoder and power lead produced by Bosch Rexroth Indramat within the RH2 Encoder Cables series. Designed for second-generation IndraDrive and IndraDyn feedback systems, the assembly routes both encoder signals and motor supply conductors between the drive and the machine axis. Its hybrid construction reduces panel wiring, simplifies installation, and maintains reliable data transmission in industrial automation where synchronized position feedback is required for closed-loop motion control.

Electrical construction begins with a Basic cable design that integrates power cores and twisted shielded signal pairs inside a thermoplastic PUR jacket. The media is classified as Hybrid Cables, meaning drive voltage and encoder channels share one sheath yet remain electrically segregated through the cabling layout [4×L + (2×0.5 mm²)C + (4×AWG 24)]StC. Current-carrying conductors use a cross section of 1.5 mm² to balance ampacity and flexibility. For thermal endurance, the wire can operate up to 90 °C under fixed routing and up to 80 °C during continuous motion, allowing compatibility with cabinet or drag-chain environments common on packaging lines and machining centres.

Mechanical service life is supported by a torsional capability of ±30° per metre so the cable can follow rotating motors or robotic wrists. The outer sheath is coloured Orange (RAL 2003) for quick identification within the Rexroth Cables product group and measures 13.0 mm in diameter, providing adequate bend stiffness without exceeding common gland sizes. An M23-Hybrid molded connector terminates the factory side to speed field replacement. Power cores are rated for 600/1000 V while the signal pairs carry 450/750 V, delivering insulation margins that suit worldwide low-voltage drive standards.

Cable Design
Basic
Cable Jacket Material
PUR
Cable Type
Hybrid Cables
Cabling
[4x L + (2x 0.5 mm²)C + (4x AWG 24)]StC
Conductor Max Temperature (fixed)
90 °C
Conductor Max Temperature (flexible)
80 °C
Cross Section
1.5 mm²
Generation
2nd Generation
Jacket Color
Orange (RAL 2003)
Max Torsion
±30°/m
Outer Diameter
13.0 mm
Plug Size
M23-Hybrid
Power Wire Rated Voltage
600/1000 V
Product Group
Rexroth Cables
Signal Wire Rated Voltage
450/750 V

Frequently Asked Questions about RH2-021DBB:

Q: What is the cable design type of the Bosch Rexroth RH2-021DBB encoder cable?

A: The RH2-021DBB encoder cable features a basic cable design for standard connectivity needs.

Q: What material is used for the cable jacket of the Bosch Rexroth RH2-021DBB?

A: The RH2-021DBB uses a PUR (polyurethane) jacket for its cable construction.

Q: What is the torsion specification for the Bosch Rexroth RH2-021DBB encoder cable?

A: The maximum allowable torsion for this cable is ±30° per meter.

Q: What is the outer diameter of the Bosch Rexroth RH2-021DBB encoder cable?

A: The outer diameter of the RH2-021DBB cable is 13.0 mm, making it suitable for installations with this requirement.

Q: What are the rated voltages for power and signal wires in the Bosch Rexroth RH2-021DBB encoder cable?

A: The power wires within this cable are rated for 600/1000 V, while the signal wires are rated for 450/750 V.


Internal Product Review

  • ‘‘The RH2-021DBB from Bosch Rexroth Indramat is a robust hybrid encoder cable with a PUR outer jacket and a basic cable design, built for demanding motion control environments. This 2nd Generation model features a flexible construction supporting a maximum torsion of ±30°/m and a conductor temperature rating up to 90°C when fixed. Its M23-hybrid plug and high-rated voltage capacity make it especially reliable for industrial applications requiring durability and stable signal transmission.’’

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