SRM50-HZZ0-S45 SICK Servo Encoder HIPERFACE Feedback

Precision Motion Feedback: SRM50-HZZ0-S45 Motor Feedback System

The SRM50-HZZ0-S45 (Part No. 1084505 / SEW Ref. 13411799) is a high-resolution multiturn rotary encoder engineered by SICK within the SRS/SRM50 motor feedback family. Utilizing the industry-standard HIPERFACE® interface, this sensor delivers 1,024 analog sine/cosine periods per turn alongside absolute position tracking across 4,096 revolutions. Machine builders integrate this 8 mm expanding-shaft unit directly into high-dynamic synchronous servo motors for closed-loop speed and commutation control.

Optical & Absolute Position Resolution

• Incremental Signal Density: 1,024 sine/cosine periods per revolution with output frequencies up to 200 kHz.
• Multiturn Capacity: Tracks 4,096 absolute revolutions (32,768 steps per turn) via binary code sequence.
• Interpolation Precision: Achieves a 0.3″ measuring step when paired with 12-bit drive interpolation.
• Linearity & Accuracy: System accuracy of ± 52″; integral non-linearity typ. ± 45″; differential non-linearity ± 7″.
• Electronic Type Label: Includes 1,792 Bytes of non-volatile EEPROM memory for motor parameter storage.

Electrical & Mechanical Specification Matrix

Environmental & Mechanical Stress Endurance

• Thermal Operating Window: Sustains continuous operation from –30 °C to +115 °C (storage: –40 °C to +125 °C).
• Vibration & Shock Immunity: Endures 20 g vibration (10 Hz to 2,000 Hz per EN 60068-2-6) and 100 g shock pulses (10 ms per EN 60068-2-27).
• Enclosure & Humidity: Rated IP40 (IEC 60529) with mating plug locked; tolerates up to 90% non-condensing humidity.
• Electromagnetic Compliance: Certified to EN 61000-6-2 industrial immunity and EN 61000-6-3 emission standards.

Field Mounting & Commissioning Best Practices

• Stator Coupling Stress Relief: Fasten the spring mounting plate onto a BEF-FA-047-061 interface without introducing axial pre-tension, which degrades the ± 45″ integral linearity.
• Thermal Isolation: Maintain motor housing surface temperatures below +115 °C at the encoder flange to protect internal optical ASICs.
• RS-485 Parameter Channel: Verify DATA+ (Pin 7) and DATA- (Pin 8) twisted-pair termination before writing motor commutation offsets into the 1,792-byte EEPROM.

Frequently Asked Questions (FAQ)

Q1: Why does the SRM50-HZZ0-S45 list two different maximum operating speeds (6,000 rpm vs. 12,000 rpm)?

A1: The encoder mechanics and ball bearings tolerate up to 12,000 min⁻¹, whereas reliable absolute multiturn position calculation is guaranteed up to 6,000 min⁻¹.

Q2: What causes distorted sine/cosine feedback signals or commutation faults immediately after installation?

A2: Mechanical tension on the spring mounting plate or radial shaft runout exceeding ± 0.05 mm dynamically distorts the optical disk alignment and skews signal offset.

Q3: Can a standard 24 V DC PLC power supply be wired directly to the encoder supply pins?

A3: No, applying 24 V DC will permanently damage the internal electronics; this unit requires a regulated 7 V to 12 V DC supply (8 V DC recommended) from the servo drive.

Q4: How is the 1,792-byte onboard memory utilized during servo drive replacement?

A4: The servo drive reads stored motor nameplate parameters, thermal limits, and electronic commutation phase angles automatically via the RS-485 HIPERFACE® channel.

Q5: Are mounting screws and the 8-pin radial mating cable included with this specific ordering variant?

A5: No, this OEM variant ships with pre-assembled mounting spacers, while stator coupling screws and the 8-pin radial mating connector harness must be ordered separately.

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