Features Application: Can be used for signal isolation, level conversion between single‑chip microcomputer, PLC and other signals, PNP and NPN signal to NPN signal, signal level and voltage conversion, etc Materials: Optical isolation module is made of high‑quality materials, this optical isolation module is sturdy, durable, not easily damaged, and has a long service life Excellent Performance: Fast and stable signal conversion speed, high work efficiency and simple operation. Size: Approx. 97 x 71 x 16mm / 3.8 x 2.8 x 0.6in High Switching Frequency: Optical isolation module using sophisticated production technology, and the limit switching frequency can be up to 20KHZ Versatile Module Connection: Module wiring has common anode signal input, common cathode signal input, and differential signal input Specification: Item Type: Optical Isolation Module Limit Switching Frequency: 20KHZ Uses: Can be used for signal isolation, level conversion between single‑chip microcomputer, PLC and other signals, PNP and NPN signal to NPN signal, signal level and voltage conversion, etc Size: Approx. 97 x 71 x 16mm / 3.8 x 2.8 x 0.6in Package List:  1 x Optical Isolation Module  Note:  1. This model is DST‑1RBP‑N (not including rail mounting frame). Model analysis: DST (digital signal converter)‑1R (one‑way transmission) 8P (8 channels)‑N (NPN output) 2. How much V is the output signal, and how much V is used for the power supply of the module Package List 1 x Optical Isolation Module