ME.280-14/20ASW-PKI BUFFERABLE POWER SUPPLY SUPPLY
ME.280-14/20ASW-PKI BUFFERABLE POWER SUPPLY SUPPLY USER MANUAL
WARNING!
Touching of mains connector is dangerous after plug in this device. The device MUST be grounded to reduce risk
of electrical shock. Ventilation should be insured for the device.
Input and output connectors and indicators of the device:
Usage of the device, choosing of the operating mode:
The device operates either as a battery charger or as a power supply. It detects automatically the presence of battery after
connecting to the mains. If a battery is connected it operates as a battery charger, if not, it operates as a power supply.
Attention! Before placing back the lid check the proper connection of the cooling fan.
1. Battery charger
Connect the output BAT to the battery and output DC OUT to the load. The output voltage is 13.8 V at both contacts,
max. current is 20 A. At the design of the load please pay attention to the current of the charger, this is determined by the
loadability of the charger. The total load at the outputs BAT and DC OUT can be max. 2 A or 4 A which can be selected
by a jumper inside. In this mode of operation the device tests the battery in every 20 seconds. If any kind of error occurs a
relay cuts the connection at ERROR output. An error message is sent to the system with delay according to the sheet
below. The reason of failure can be known by the signals of the LEDs. Please pay attention to the right polarity! Plug the
mains voltage to the input contact AC IN 230 V 50/60 Hz.
The meaning of the LED signals. In power supply mode the battery signals do not work.
LED signal state
Mains OK:
DC output OK:
Battery OK:
Battery change:
System overheating:
Power on self test:
AC
continuous
DC
continuous
BAT
continuous
BAT
flashing
AC DC BAT flashing
AC DC BAT + Fan
LED not light
No power:
No DC output:
Battery is flat:
Error message
ERROR yes
ERROR yes
ERROR yes
ERROR yes
ERROR yes
ERROR no
Delay
20 s
20 s
20 s
20 s
0s
2s
The device charges the battery automatically (according to I-U characteristic), there is no need to any intervention. In case
of mains power cut the device prevents the deep discharge or failure of the battery by switching off the load at below 10.5
V battery voltage. After returning of power the charging process starts. If the charging voltage reaches 12.5 V on the
battery the loading is reconnected. This solution is working with safe and avoiding possible trouble.
2. Power supply mode (no battery is connected)
Application example: supply of 12 VDC cameras
Connect the mains voltage to the input connector 230 V 50/60 Hz. Adjust the output voltage by potentiometer installed
inside the device to 12 V measured by a multimeter. Max. loading current is 20 A. In this operating mode the charger and
deep discharge function are not in operation.
Specifications:
Input: 230 V ±10% 50/60 Hz
Output voltage: 12 V to 13.8 V
Max. current: max. 20 A
Error contact max.load: 30 V 100 mA
Insulation class: I.
Protection: IP 00
Max. ambient temperature: -10 °C…+50 °C
Dimensions (WxDxH): 145 x 95 x 52 mm
Built-in protections against:
Overloading, short-circuit, overheating, deep discharge
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