How do I connect a Selec Temperature Controller to a relay or SSR output?
To connect a Selec Temperature Controller to a relay or SSR (Solid State Relay) output, you need to follow a simple wiring setup. First, check your controller’s output type — it will be either relay contact output or SSR drive output. For a relay output, connect one terminal of the relay output to your load (like a heater), and the other to the power supply’s live line. The neutral line goes directly to the load. This setup allows the controller to switch the relay ON or OFF based on the set temperature. Make sure the relay’s voltage and current ratings match your load specifications.
For SSR output, the wiring is slightly different. Selec controllers with SSR drive output provide a DC signal, usually 12VDC, which is used to trigger an external Solid State Relay. Connect the SSR input terminals to the controller’s SSR output terminals (positive to positive, negative to negative). Then, wire the SSR’s load terminals to the AC supply and your heater or cooler. The Selec Temperature Controller sends control signals to the SSR, which handles the actual power switching. This setup is preferred for applications requiring faster switching and higher durability, such as plastic molding machines or ovens.
Always refer to your controller’s wiring diagram, usually printed on the side or back of the device, before connecting. Also, double-check the polarity and ensure proper grounding to avoid short circuits. Whether you’re using relay or SSR output, the Selec Temperature Controller provides safe and precise temperature control once wired correctly. In short, relay outputs are ideal for low-frequency switching, while SSR outputs work best for frequent, high-speed control.