Solid state relays
Solid state relays
(OP)
I am using a temperature controller in order to control some heating tapes. The output of the temp control is 5 volts when I hooked it up to the input of a SSR 3-32V the output of thetemp control drops to @ 1V if I leave the volt meter accross the input the voltage rises to an acceptable level @ 3.8 as soon as it shuts off the cycle I lose the voltage again. Then when it is retriggered I still do not have enough DC V (@ 1V again).
I seem to vaigly remember having this problem in school we would use a diode across the DC input I am fairly sure but I do not remember the biasing or the type of diode.
I felt this would be a cheaper solution than just buying a new temp controller thanks
I seem to vaigly remember having this problem in school we would use a diode across the DC input I am fairly sure but I do not remember the biasing or the type of diode.
I felt this would be a cheaper solution than just buying a new temp controller thanks





RE: Solid state relays
Based on the way I understand your statements, is it possible the gate current for the SCR is higher than the controller can source? These are generally only 'logic' type outputs not capable of sourcing much current (25mA or less). This would be consistent with your statements because the voltage supply will 'brown' out if too much current is being pulled.
RE: Solid state relays
Quando Omni Flunkus Moritati
RE: Solid state relays
is there a dry contact or voltage free contact on this temperature controller? this contact open and closes on your preset temperature..you can then use this contact to drive an SSR using the available voltage you have..DC or AC..
dydt
RE: Solid state relays
The relay is a solid state relay with snubberless triac output, 3 to 32 VDC input voltage range, voltage input, 0.05 to 25 ampere rms output current, 24 to 240 volt rms output voltage.
RE: Solid state relays
RE: Solid state relays
Quando Omni Flunkus Moritati
RE: Solid state relays
Are there any other outputs available on the controller, ie relay? If not, then you will likely have to drive a transistor base to turn on the SCR (dont think you will find a relay coil of 5V that only requires 25mA). Good luck.
RE: Solid state relays
RE: Solid state relays
Milliampere-DC measurements between controller and SSR should be revealing.
RE: Solid state relays
RE: Solid state relays
RE: Solid state relays