Safety relay is the main component of safety control circuit, which receives safety control signal input, outputs relay switch signal, and connects to the control circuit of the equipment. The HD2000 series safety relay receives wide voltage (16~35) VDC control switch signals and achieves safe and reliable isolation circuits through triple redundancy technology, automatic protection technology, contact fusion protection and other technologies. It supports single or dual circuit operation and is compatible with rail and bottom plate installation methods. The product meets the requirements of IEC61508 standard, and its safety function integrity has reached SIL3 level.