Optocoupler output and relay output difference
Optocoupler for non-contact output, control speed, at the US level, while the relay control delay, in 100MS or so, optocoupler control current is generally about 200MA, while the relay control can reach 1A or even greater, the voltage level high,
The optocoupler output is a non-contact output that controls the signal. The relay output can be directly controlled by the appliance.
Optocoupler output is the transistor output, the working current is small, fast
Relay output is the contact output, the working current can be selected according to the need for large contacts relay, the working current is large, the output time has a certain delay.
the difference:
Optocoupler: non-contact, high operating frequency (fast), low load capacity (mA level), long life
Relay (mechanical): a physical contact (connected and segmented may produce sparks), low operating frequency, load capacity, mechanical life is relatively short.
