Feature: 1. Module connection has common anode signal input, common cathode signal input, and differential signal input. 2. Using sophisticated production technology, and the limit switching frequency can be up to 20KHZ. 3. Has excellent performance, fast and stable signal conversion speed, high work efficiency and simple operation. 4. Made of high‑quality materials, this optical isolation module is sturdy, durable, not easily damaged, and has a long service life. 5. Wide range of uses, can be used for signal isolation, level conversion between single‑chip, PLC and other signals, PNP, NPN to NPN. Specification: Item Type: Optical Isolation Module Limit switching frequency: 20KHZ. Module Size: Approx. 85 x 97 x 40mm / 3.3 x 3.8 x 1.6in (Length x Width x Height). 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. The output signal is a few V, and the module power supply uses a few V.