Detailed Answer
SIL (Safety Integrity Level) is defined by IEC 61508, with four levels SIL1–SIL4 (4 being the highest). Safety-related functions of industrial remote controls (emergency stop, signal-loss protection) usually require SIL1–SIL3. The safety functions of the LDER LD series comply with EN ISO 13849, and high-end XINGJIA models meet SIL2. When purchasing safety-critical equipment, confirm the product's safety certification matches the risk assessment requirements.
| Levels | SIL1–SIL4 |
| Remote controls | SIL1–SIL3 |
| Standard | IEC 61508 |
Note:Higher safety levels cost more — choose according to the risk assessment.