Hi all,
I have a Pixsys ATR244-12ABC temperature controller, and it’s connected as follows:

Pins 17/18/19 are connected to a PT100 temperature probe.

Pins 1 and 2 are connected to the AC 240V mains supply (to power the device).

Pins 3 and 4 are connected to a solid-state relay (SSR), which has terminals labeled 3+ / 4- / 1 / 2:

Pin 4 of the ATR244 is connected to 3+ of the SSR with a red (positive) wire.

Pin 3 of the ATR244 is connected to 4- of the SSR with a black (negative) wire.

For the heating element wiring:

Terminal 1 of the SSR is connected to the live (phase) wire from the AC 230V supply using a black wire.

From the same AC socket, the neutral (blue) wire goes directly to one terminal of the heating element.

The other terminal of the heating element is connected to terminal 2 of the SSR with a black wire (phase).

The problem:
The controller correctly reads the temperature from the PT100 sensor — temperature changes are detected properly.
However, the heating element does not warm up at all.
Even when I set a target temperature (e.g., 50°C), the controller switches to C1 mode, and the TUN LED turns on, but the heating element remains cold.
I left it running for several minutes, and the temperature didn’t increase by even 0.1°C.
I can hear the relay click when it activates, so the control signal is definitely being sent.

My questions:
How can I make the heating element work?

What could be the cause of this issue?

Is this a wiring problem or a controller configuration issue (such as incorrect output settings on the ATR244)?
Thank you in advance
Best Regards
Francesco

 

The SSR drive input needs a 5-32DC on/off control signal, but you've wired the SSR's control signal terminals to a set of dry contacts. Dry contacts are dry contacts, that have no voltage on them unless you connect a voltage source. So the relay clicks and calls for heat, but the relay contact terminals are not supplying a voltage/current control signal to the SSR.

If you add a DC power supply (+) to one of the relay terminals, wire the other relay terminal to the SSR (+) and wire the SSR (-) to the DC power supply (-), then you'll have a circuit to drive the SSR.

Or, there are outputs labeled DO outputs which are PNP active outputs that can source the voltage/current needed to drive the SSR.



I would expect that somewhere in the settings you have 'associate' which of the controller's outputs is the active PID output, a DO or the electromechanical relay, but I'm too lazy to read the manual, so you'll have to read the manual to figure that one out.