Replacing the original Satchwell 24 volt actuator, (ALX, XRM or similar) with the current Schneider Electric version.
Actuator is connected to a CXT 4604 controller.
The CXT 4604 controller internal transformer has a limited VA rating, this is insufficient to supply some new 24 volt actuators.
To overcome this situation an external transformer with a suitable VA rating must be added to the system, please see drawing below.
This drawing shows the controller being connected to a M800, but this configuration will apply generally if other SE actuators such as, M700 or MV15B-24 are used.