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When the cyrixct is connected with with the 86 pin to the minus of the battery, the relais stays closed and no current is going through. When the engine is running the voltage is abive 14,5v but it stays closed. When i do not connect the minus pin 86 to the battery the relais switches and stays open, but it does not close when the voltage is low and when the engine stops. Does anyone know if the cyrix-ct is broken or do i do something wrong?
I think you misunderstood the function of the cyrix.
The cyrix close if voltage is over 13-13.8V(with intelligent trend detection) on one side and open if voltage is under 11-12.8V(with intelligent trend detection).
Your description of what is happening makes full sense.
If Pin 86 is not connected to ground, then the Cyrix-CT will NEVER switch on (close) regardless of the engine voltage.
If Pin 86 is connected to ground, then it will operate as per the table posted by M.Lange, which it sounds like it is doing.
What is it you are expecting to happen?
One thing to note: If either side of the Cyrix-CT has a very low voltage (I cannot recall the value), then it will not switch on (close). So if testing the function, it is important to have a voltage (so a battery basically) connected on both sides. Other VSRs do not have this need as they are simple relays.
Tank you for your answer.
The thing is, I have the feeling it does not charge my secondary battery when the engine is running. I have a solar panel as well, which works, but I have the feeling that I don't get any charging from the engine when running.
I may be using the wrong words for explaining. But when I did not connect pin 86 to ground the cyrix did let through current. When I connected pin 86 to ground. It stopped. And I thought this is strange, but maybe I just don't understand. When testing I did not put a voltage on both sides. So that could be a problem. But with a voltage on both sides I don't now how I could test if it works...
My idea was that when the engine is running the voltage is high and the cyrix-ct switches on and let's through the current to the secondary battery. When the engine stops, the voltage level drops en the cyrix will switch off and stop current flowing from one to the other battery
