The Cebek FE-138 module is a single rail 24VDC stabilized power supply. It can deliver a maximum of
4A, the output is fully regulated and short circuit protected. A PCB mounted
pre-set potentiometer is supplied to adjust the output voltage, to allow for
long cable runs and supply voltage variations. The FE-138 module has a small
toroidal transformer mounted on the circuit board. and LED to indicate its
operating.