Operation; Preparations; ConnectingTheElectricalSystem; Switching On - Würth BLG 12/24 V – 120 A Betriebsanleitung

PSU operation (external power supply)
In support mode the charger functions as external power supply.
This allows on-board systems in vehicles to be powered and tested without battery.
Buffer mode
The charger ensures safe charging and charge retention of the battery in charge mode, also when consumers
are switched on: up to 60 A for 24 V and 120 A for 12 V.
Reverse polarity protection
Thechargerdetectsthereversepolarityanddoesnotstartcharginginchargemode.ThewhiteLED(6)lights
up,seefig.2,page43).
Clamp detachment
Thechargerreliablydetectsiftheclampsbecomedetachedduringthechargingprocessandswitchesoff.
Serial interface/firmware update
Thechargerhasaserialinterface(USB).
Thecorrespondingsocket(7,seefig.2,page43)islocatedtotherightbelowtheLEDs.
Ifasoftwareupdateisrequired,thefirmwarecanbeeasilyupdatedviathisinterfaceusinganappropriate
USB memory device.

4.1 Preparations

• C heckcompliancewiththerequiredoperatingconditions(→alsoseechapter7"Technicaldata").
• I fnecessary,allowtheunittoacclimatiseslowlytoroomtemperature.
• C hecktheoperator'ssupplynetworksforcompliancewiththespecifications
(→seealsochapter7"Technicaldata").
4.2 Connecting the electrical system
WARNING! Risk of tripping!
Mains cables laid in an unsafe manner are tripping hazards and can cause falls resulting in
injury.
Therefore:
 • A lwayslaythemainscablesafely.
1. Lay the mains cable safely.
2.Connectthemainscableofthedevicetotheoperator'spowersupply.

4.3 Switching on

4.3.1 Tests before switching on

W ARNING! Risk of injury as a result of inadequate qualification or improper

operation!

Improper or careless handling of the device and unfamiliarity with the potential dangers can
result in serious injuries.
4 Operation
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