2U 48Vdc 50A telecom rectifier module

RM4850-A is a power supply device that converts standard AC voltage into stable 48Vdc for communication power supply system.

For a larger load capacity, the rectifier modules can be connected in parallel, or an additional independent monitoring module can be used for intelligent control.The rectifier module is a plug-in modular unit designed to be compatible with racks and cabinets.

1.1 Input Feature

1.2 Output Feature

1.2.1Output voltage current regulation

Note: The rectifier module output current regulation and communication interruption are as follows:

1) The output current of the rectifier module can be adjusted according to the current command. The adjustment range is 1A~50A.

2) Communication fault more than 1 minute (Rectifier and Control monitor),A .Rectifier module output Voltage automatic  recovery  default  Voltage  53.5V and limited current function not working;b.if the rectifier modules are controller by  monitor and Power off, then rectifier system will power on(if the rectifier fault, it can not be turned on again)

1.2.2 Efficiency 

1.2.3 Output ripple and noise

Note：Ripple and Noise testing:Ripple and noise Default as 20 MHz

1.2.4 Output dynamic response

1.2.5  Output Overshoot

Note：

Loading Range Minimum to maximum.

1.2.6 Power Switch Point

1.2.7 Power on output delay time

Note: The power-on delay time is the time from AC power-on to output voltage (to 46VDC)

1.2.8  LED indicator

The power LED is installed on the power panel side and the output status is shown in the table below.

1.2.9 Noise Voltage

1.2.10 Rectifier module and monitor module communication function  

RS485 communication mode (half-duplex, double-line) is adopted between the rectifier module and the monitoring module.

The RS485 interface in the rectifier module needs to be isolated. The RS485 power supply is +5Vdc (regulation accuracy ±5%), which is provided by the monitoring module.

The main monitoring information of the rectifier module is:

1) Adjust Voltage and Current function: meet the requirements of battery floating charge and meet the adjust voltage requirements;

2) Single module switch machine control;

3) Alarm information:

Mains failure: mains failure (AC input over voltage);

Module protection: temperature pre-alarm;

Module failure: Output over voltage shutdown, fan failure, over temperature shutdown or no output caused by internal causes of other modules; (module is in: sleep shutdown state, mains failure does not report module failure).

1.3 Protection Function

1.3.1 Output Limited Current Protection

1.3.2 Output short circuit Protection

1.3.3 Output Over Voltage Protection

Note: After entering the lock protection state, you need to disconnect the AC power first, and then re-power on, the  rectifier module  can be re-operated.

1.3.4 Input Over Voltage Protection

Note: Input overvoltage protection should be tested at 50A rated load.

1.3.5 Input under Voltage Protection

1.3.6 Over -Temp.Protection