Solid State Relay SSR-40 DA Wiring Diagrams

Solid state relay is a semiconductor device instead of the traditional electrical contact as a contactless switching device switching device, relay characteristics of the single-phase active SSR four-terminal device, two inputs to the control terminal, two outputs, optical isolation between the inputs and outputs, inputs and DC or pulse signals at a certain value, the outputs can be shifted from the state of the country to the state.

Used as a switch: only for the no-contact electronic switch with isolation function, no mechanical contact part in the switching process, widely used in computer peripheral interface devices, thermostat system, temperature regulation, heating furnace heating control, motor control, numerical control machinery.

The wiring diagram is as follows:

Expanded Information:

Note:

Output circuit: it mainly uses high-power crystal transistors, unidirectional thyristors, bidirectional thyristors, power field effect transistors, insulated-gate bipolar transistors. It can be divided into DC output circuits, AC output circuits and AC / DC output circuits.

By type of load it can be categorized into DC solid state relays and AC solid state relays. The DC output can use bipolar devices or power field effect tubes, and the AC output usually uses two SCRs or a bi-directional SCR.

AC solid state relays can be divided into single-phase AC solid state relays and three-phase AC solid state relays. AC solid state relays can be divided into random AC solid state relays and over-zero AC solid state relays according to the conductivity and turn-off time.