TR Electronic CDH75M-00001 SIL3 PL e Rotary Encoder SSI

Powergear X Automation’s Insight

• The TR Electronic CDH75M-00001 represents a pinnacle in safety-rated motion feedback technology.
• It integrates redundant measurement systems within a single hollow shaft housing.
• This design eliminates the need for secondary encoders in SIL3 applications.
• Engineers value its dual SSI output for real-time cross-validation.
• It excels in heavy-duty lifting and automated stage technology.

Product Description

• The TR Electronic CDH75M-00001 is a high-precision SIL rotary encoder.
• It features a robust 20 H7 hollow shaft with a 5 JS9 groove.
• This CDH75M series device ensures maximum safety in industrial environments.
• It provides reliable position data via a CRC-safed SSI protocol.
• The redundant hardware architecture monitors internal microcontrollers constantly.
• You receive consistent performance in safety-critical motion control tasks.

Technical Specifications

• Brand: TR Electronic
• Model: CDH75M-00001
• Measurement Range: 25-bit total capacitance
• Resolution: 8,192 steps per revolution (13-bit)
• Multi-turn Range: 4,096 total revolutions (12-bit)
• Safety Rating: SIL 3 (DIN EN 61508) and PL e (EN ISO 13849)
• Hardware Interface: 2x SSI interfaces with redundant detection
• Incremental Track: RS 422 rectangle output with 4,096 pulses
• Power Supply: 11 V DC to 27 V DC range
• Current Load: Less than 150 mA at 24 V DC
• Rotational Speed: Maximum 3,000 min-1 mechanical limit
• Angular Acceleration: Up to 10,000 rad/s²
• Environmental Protection: IP 54 rating (DIN EN 60529)
• Working Temperature: 0 °C to +60 °C standard range
• Vibration Resistance: 100 m/s² (50 Hz to 2,000 Hz)
• Shock Resistance: 1,000 m/s² (11 ms half-sine)
• MTTFd/PFH: 10 x 10⁻⁹ 1/h for the complete system

Installation and Compatibility

• Connect via two cable glands in the removable cap.
• Mount the 20 H7 hollow shaft directly to your motor.
• Use the flange-sided attachment to prevent unwanted rotation.
• The controller must perform cross-validation of both SSI channels.
• Compatible with Siemens Simatic S7 safety PLCs and Beckhoff TwinSAFE.
• Ideal for overhead cranes, theater stage machinery, and wind turbines.

Diagnostics and Maintenance

• The system monitors internal microcontrollers and data integrity.
• Channel 1 transmits position data with an integrated error bit.
• Channel 2 provides status bits and a sign-of-life counter.
• Check the CRC checksum for every SSI data transmission cycle.
• The bearing life reaches 39 billion revolutions at 1,500 min-1.
• Maintenance involves periodic inspection of the shaft coupling torque.

Purchase and Logistics

• Warranty: 12-month standard manufacturer quality guarantee.
• Package Includes: One TR Electronic CDH75M-00001 encoder and manual.
• Shipping Time: Orders ship within 24 to 48 hours.
• Delivery Partners: Fast shipping via FedEx, UPS, or DHL.
• Inquiries: Email sales@powergearx.com for bulk pricing.
• Support: Contact our team via WhatsApp: +86 18030005825 today.

Selection Guide and FAQ

How do I choose between different CDH75M models?

• Focus on the shaft diameter and the incremental track type.
• This CDH75M-00001 uses a 20mm hollow shaft with RS 422.

Does this encoder require a separate safety relay?

• No, it interfaces directly with a safety-rated PLC.
• The PLC handles the required signal cross-validation.

Why is the sign-of-life counter important for SIL3?

• It detects frozen data or communication interruptions instantly.
• This ensures the controller always processes fresh position values.

What happens if the two SSI channels don’t match?

• The safety controller must trigger an emergency stop.
• This mismatch indicates a potential internal hardware failure.

Can I use this in outdoor environments?

• The standard IP 54 rating requires additional housing for outdoors.
• Contact us for the optional -20 °C temperature version.

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