Product Abstract

The CDH75M-00001 is a high-integrity SIL 3 / PL e certified rotary encoder. It is designed for safety-critical motion control using a redundant 25-bit detection system. With dual SSI interfaces and CRC-secured protocols, it provides fail-safe position feedback. The 20mm hollow shaft design ensures easy integration into heavy-duty industrial machinery requiring maximum functional safety.

Oiltech Controls Limited’s Insight

Our engineering team views the CDH75M-00001 as a specialized safety component for “Zero Failure” environments. The CDH75M series excels by integrating two redundant detection systems within a single housing. This eliminates the need for dual-encoder mounting to achieve SIL3 levels. The inclusion of a Sign-of-Life counter ensures the controller detects any data corruption immediately. For high-value assets, the CDH75M-00001 provides the diagnostic coverage (PFH 10×10⁻⁹) necessary for stringent safety standards.

Core Technical Specifications

• Brand & Model: TR Electronic CDH75M-00001
• Safety Rating: SIL 3 (DIN EN 61508) / PL e (EN ISO 13849)
• Total Resolution: 25-Bit (8,192 Steps/Rev | 4,096 Revolutions)
• Interface Type: 2x SSI (Dual Independent Channels)
• Redundancy: Dual µC monitoring with CRC and Sign-of-Life counter
• Voltage Supply: 11 to 27 V DC (< 150 mA at 24 V)
• Shaft Design: 20 H7 Hollow Shaft with 5 JS9 groove
• Incremental Track: Rectangle (RS 422) 4,096 pulses (Unsafe)
• Mechanical Speed: ≤ 3,000 min⁻¹
• Protection Class: IP 54 (DIN EN 60529)
• Environmental: Vibration ≤ 100 m/s² | Shock ≤ 1,000 m/s²

Application Scenarios & Compatibility

• Heavy Lifting: Safe position monitoring for hoists and bridge travel in harbor cranes.
• Stage Technology: Synchronized lifting of theater platforms where SIL3 is mandatory.
• Renewable Energy: Pitch and yaw control for wind turbines requiring fail-safe reliability.
• Automated Logistics: Vertical movement safety for high-reach stacker cranes in warehouses.
• PLC Compatibility: Pairs with safety controllers like Siemens S7-F, Beckhoff TwinSAFE, or Pilz PSS 4000.

Advanced Diagnostic Capabilities

• Cross-Validation: Dual channels allow the controller to compare position data in real-time.
• Heartbeat Monitoring: Sign-of-Life counters detect if internal microcontrollers freeze or lag.
• Data Integrity: CRC-secured protocols prevent errors from electromagnetic interference.
• Status Signaling: Integrated error bits notify the system of internal sensing malfunctions.

Logistics & Warranty Terms

• Quality Guarantee: Includes a 12-Month Warranty for all manufacturing defects.
• Global Delivery: Fast international shipping via FedEx, UPS, and DHL.
• Packaging: Original factory-sealed box including technical inspection reports.

Expert FAQ & Procurement Guide

• Question: How does the CDH75M-00001 achieve SIL3 with one connection?

  Answer: The internal architecture uses two independent sensing systems. Your safety PLC compares both SSI channels to validate the position data.

• Question: What is critical to check before purchasing this hollow shaft model?

  Answer: Verify your motor shaft is exactly 20 H7 with a 5 JS9 keyway. Rigid mechanical coupling is vital for SIL3 integrity.

• Question: Can the incremental track be used for safety speed control?

  Answer: No, the incremental track is “Unsafe.” You must use the redundant SSI interfaces for all safety-rated tasks.

• Question: What if the two SSI channels show different positions?

  Answer: Small differences are normal. Your PLC must set a “window of tolerance.” Exceeding this should trigger a safe stop.

• Question: Is the connection cap removable for wiring in tight spaces?

  Answer: Yes, the CDH75M-00001 has a removable cap with two glands, making field wiring much faster.