I picked up an old traffic light, and it looks like someone wired it up with this board. I don't imagine anyone has any idea what it is?
There's no model name that I can see. I went on comfile's support page (link) but there doesn't appear to be email support, only telephone. An odd company. I guess I can call them tomorrow.
I'm planning to use an Arduino to control the lights, but maybe I can use this instead of a relay board.
Looks like a nice four channel solid state relay board on a din rail adapter.
Look carefully at the relay bodies for part numbers and operating voltages. It might be 5v but 12 or 24 vdc would be more likely.
Need to trace out the wiring. What is the object in the third photo? What external connections does it have?
This is definitely superior to making your own relay board. for this totally obsolete gadget. 
Nope! I will take a guess and say it is a custom board for that particular manufacturer. Not all manufacturers post the circuit diagrams or even make them available to there customers.
All the inputs and outputs are clearly identified. You should be able to use it just by figuring out the right voltages.
my first thought was optoisolator
Do the lamps gave any ratings other noted on the glass envelope?
That’s your first hint.
The SSRs will be switching that from the SN inputs.
Now you need to determine how the SSRs are to be driven.
My guess would be +5V on the +Vcc pins, and each of the SN# inputs is pulled down to 0V to turn on the associated LED, SSR and lamp.
With the annotations shown, I’m guessing the lamps are AC driven.
The labelled voltage will help you there.
I have no idea what the second image is?? Maybe just the ‘incoming’ external control connector.
I'll give them a ring tomorrow. The second image is the back of the board with the SSR's.
Solid state relay board for the win! I never called them, I just gave it a shot with an Arduino and works great. My first time using SSR's. Aaaaah the silence, no more relay clickety clack.
Traffic Jam is born.
3 lights, 4 relays....???
a spare channel !
And that 4th relay is all wired up! Awaiting more traffic. Not sure what to do with it exactly yet.
As is a motion sensor by the way. I was thinking about making it turn into a painfully long red light whenever someone approaches, ha. Or some other clever idea?
The fourth channel SSR could have been something related, like a ‘DONT WALK sign (mounted separately in a different box) which is mounted separately.
wrybread:
And that 4th relay is all wired up! Awaiting more traffic. Not sure what to do with it exactly yet.As is a motion sensor by the way. I was thinking about making it turn into a painfully long red light whenever someone approaches, ha. Or some other clever idea?
left turn on arrow only
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