Optocoupler question

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glen65

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Joined 2004
#1
I have an optocoupler which needs replaced. It is an AC input type but I'm not entirely
certain which it is according to its markings. I dont want to make the mistake of ordering
the wrong device. Below is a photo of the device with its markings.
The top row is V022T, the bottom is Q-814.



My thought is that this might be a possible replacement, but looking for more input to be sure.
F0D814A

Thanks.
 
#3
dchisholm said:
Do you know whether the output is a transistor (most common), SCR, or Triac?
Click to expand...

That's the part I'm not entirely sure about, whether its a transistor or Triac.
Plus if it is transistor whether it's a single or darlington output.

There are several of them which appear to be drivng the inputs of an IC (DS2003), which is just
a series of darlington transistors. http://www.ti.com.cn/cn/lit/ds/symlink/ds2003.pdf
The outputs of the DS2003 are then used to control a series of relays.
 
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#4
The drive for darlington transistors would have to be a DC voltage. Thus the output of the opto isolator is most likely a phototransistor. Finding DC voltage present on Pin 6 of the optoisolator would be the most likely indicator of that, with the load drive coming out pin 4. . If the device is 4 pin, those feed the voltage in to the load side on pin 4 usually and out to the load on pin 3.
 
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#6
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