1. 24V optocoupler insulation board with EL817 functions, provides a wide input signal voltage range of DC 1.8V 24V and a maximum input current of 50mA. Ideal for 1 channel opto PNP NPN signal conversion and optoelectronic isolation applications. Input 24V compatible 2. Optocoupler isolation module with PC817 card rail bracket, provides impressive insulation voltage over 3000V and a maximum output current of 50mA. Suitable for various optoelectronic isolation and signal conversion, with a working temperature range of 55 110 degrees. Input voltage: 24V 3. 1 channel optocoupler isolation module for signal conversion and isolation, with a wide input signal voltage range of DC 1.8V 24V and a maximum output current of 50mA. Optocoupler isolation module is designed for compatibility with input signals of 24V and provides reliable performance in various applications 4. Optoelectronic isolator with 3 5V input and EL817 optocoupler, delivers excellent insulation voltage above 3000V and a maximum output current of 50mA. Suitable for Opto PNP NPN signal conversion and various optoelectronic isolation requirements, compatible with input signals of 24V