MOC217M

The MOC217M is an optoisolator with transistor, photovoltaic output. It is widely used in communication systems, medical and industrial process control systems, data acquisition, and signal conditioning. It features high isolation with visible light safety and reliable performance.

Application Field

The MOC217M is designed to provide safety isolation between transmitting and receiving devices with very long working distances. Common application fields include process control in hazardous environments, industrial equipment, and pharmaceutical production. It is especially useful for long distances where radio frequency interference (RFI) is a concern. Additionally, it can be used to safely convert two voltages or currents of different levels and frequency ranges, providing isolation and protection against high voltage, radiation, and ground loop.

The MOC217M optoisolator works by detecting light energy from the transmitting device and converting it into an electrical signal on the receiving device. The transmitting device emits light in the form of infrared (IR) photons, which are detected by a photo diode on the receiver end. The photo diode then converts this light energy into a voltage on the receiving side of the circuit. This voltage is then amplified and used to control the receiving device or to provide a signal to the controlling circuitry.

The isolation provided by the MOC217M optoisolator ensures that even in extreme environmental conditions the transmitted signal is not affected. The device also prevents any direct electrical connection between the two devices, minimizing the chance of any circuit damage. In addition, the small size of the device enables it to be used in a wide range of very small circuit boards, including those with tight space requirements.