Using of Power Supply Unit from Motorola Horizon II GSM BTS (Base Transceiver Station).
Voltage of this Power Supply Module is typically set to 27.5V DC, but it can be adjusted between 21 and 29V.
This is how i reworked the connectors.
Internal PINS
Be careful and of course use this information at your own risk.
My Supply with P/N 0186585W02 is used by this way, with very dynamic load from long time and everything runs smoothly. Stability is amazing, under 30A load, the voltage drop is under 15mV! I did not observed any noise or EMI coming from this supply.
73!