HEIDENHAIN ROQ 425 Absolute Rotary Encoder

Description

The HEIDENHAIN ROQ 425 is a high-precision absolute rotary encoder designed for industrial applications requiring accurate and reliable position feedback. This multiturn encoder offers a resolution of 512 steps per revolution and communicates via the robust Synchronous Serial Interface (SSI). Its solid construction and wide operating voltage range make it suitable for a variety of automation and control systems.

Specifications

• Manufacturer: HEIDENHAIN
• Model Series: ROQ 425
• Part Number (Id.Nr.): 326 172-01
• Type: Absolute Rotary Encoder, Multiturn
• Positions per Revolution: 512
• Interface: SSI (Synchronous Serial Interface)
• Supply Voltage: 10V to 30V DC
• Shaft Type: Solid Shaft

Label Info

• ROQ 425 512 27S17-93
• Id.Nr. 326 172-01
• S.Nr. 7 778 775 C

Application

This encoder is ideal for use in CNC machinery, robotics, packaging machines, and any automated system where precise angular position is critical for operation.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this pre-owned component, you are helping to avoid the emission of approximately 12.0 kg of CO2, which would have been generated during the production of a new unit. This saving is comparable to driving 60 km in a standard passenger car.

Availability

This is an obsolete item, but it is available from our stock. Ensure your machinery's longevity with this direct replacement part. Order now from PLC2Day for expert support and fast delivery.

FAQ

This is a multiturn encoder. It has 512 steps per revolution (9 bits single-turn) and a multiturn resolution based on the 27S17 code, which typically corresponds to 17 bits. This results in a total resolution of 26 bits (9 + 17).

The label indicates 'SSI09'. This specifies the Synchronous Serial Interface protocol. You will need a compatible controller or PLC card that can read SSI data. It's best to consult the original Heidenhain documentation for the ROQ 400 series for exact timing diagrams and clock rate compatibility.

Mechanically, the ROQ 425 often shares flange dimensions and shaft sizes with its successor, the ROC 425. However, you must always verify the shaft diameter, flange type, and overall body length against the technical drawings of both your existing setup and the potential replacement to ensure a perfect fit.

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Last Update: Friday, March 13, 2026