Automatic Charger Pb 2425 SMT 3B

Device with humidity-proof electronic system - Article-No. 6239


Pb 2425 SMT 3B 6239

Charging Programs:

1  2  4

Technical Features:

BR  DC  FB  Kap  PL

SR  TK  VF  LV  Tropfen

Charging Options:

Batterien 2S

1 to Supply Batteries or
1 to 2 Starter Batteries or
1 Supply and 1 Starter Battery


  • Charging programs No. 1, 2 and 4 (gel, AGM, acid) adjustable to the battery type
  • The charging voltage is free from peaks and is controlled in such a way, that overcharging of the batteries is excluded
  • Fully Automatic Continuous Operation: The charger may be connected continuously to the battery, thus keeping the full charge. Battery discharge in case of power failure is avoided (separation by safety relay)
  • Battery regeneration in case of extended standstill periods: twice a week to avoid harmful acid accumulation
  • Parallel and Floating Operation: In case of simultaneous consumption, the battery will either continue to be charged or maintained via trickle charging. Calculation and control of the adaptation of the charging times is effected automatically by the charger
  • Unattended Charging: Multiple protection against overload, overheating, overvoltage, short circuit, reverse battery, incorrect behaviour and back discharge of the battery by electronically controlled gradual reduction down to complete separation of charger and battery by integrated safety relays
  • Connection for Battery Temperature Sensor (Accessory Temperature Sensor 825, Order No. 2001): Lead batteries (acid, gel, AGM): In case of low outside temperatures, full charging of the weak battery is improved by automatic adaptation of the charging voltage to the battery temperature, and in case of summery temperatures unnecessary battery gassing and battery load will be avoided.
  • Silent Run Function: Noise‐optimised operation (night operation) at the touch of a button
  • Power Pack Function: Allows supplyof the consumers without battery (such as during battery replacement)
  • Charging Cable Compensation: Automatic compensation of voltage losses on the charging cables
  • Integrated On‐board Mains Suppression Filter: Unproblematic parallel operation with solar systems, wind and petroldriven generators, dynamos etc. on one battery
  • Charging aid for totally discharged lead batteries: Gentle preliminary charging of the (lead‐acid, gel, AGM) battery to 8 V, followed by powerful support of the battery, in case of possibly switched‐on consumers
  • Separation of the batteries in case of power failure, overheating, incorrect behaviour (safety relay for each charging port)
  • Separate auxiliary charging port "S" for support charging and conservation of charge of the vehicle's starter battery
  • Integrated charging current distributor with 2 main charging ports, each with max. current and output capacity for short charging times
  • Charging current distributor can be switched to an own charging program for the starter battery
  • If required, the starter battery can also be charded with full charging current (short stop period of the vehicle)
  • 4 Battery capacitiy rates can be adjusted (12 charging programs in total)
  • Inputs for sensor (sense) lines, which can be optionally used in case of charging cables in overlength and/or in case of external diode charging current distributor with volage loss
  • The mains/charging capacity can be reduced in case of low capacity or restricted power supply, such as in case of weakly protected country current supply, generator operation etc. (power limint function)

Technical Details

 Charging Capacity in [V]/[A] 24 / 25
 Nominal Operating Voltage (AC) in [V] 230
 Operating Voltage Range (AC) in [V] 190 - 265 (Full Charging Capacity)
 Power Consumption (AC) in max. [W] 830
 Sinusoidal Power Factor Correction (CosPhi = 1) yes
 Nominal Battery voltage (DC) in [V] 24
 Battery Capacity in [Ah] 46 - 290
 Charging Current in [A] 25
 Auxilary Charging Port "S" in [A] 4
 Characteristic Line of Charging IU1oU2
 Voltage limitation during all charging modes and programs [V] 30
 Ripple Factor Voltage in [mV] rms < 60
 Number of Charging Ports 2 + S
 Mounting Position of Unit any
 Temperature Range [°C] -20 to +45
 Protection Class/System of Protection I / IP 21
 Dimensions in [mm] - Dimensions incl. mounting flanges/feet, without connections 330 x 139 x 74
 Weight in [g] 2400
 Mark of conformity (CE) EN 60335-2-29
 Ambient Conditions, Humidity of Air:  max. 95 % RH, No Condensation
 Delivery Scope: Mains supply cable with shock-proof plug, Operating Manual

Charging Programs

1 „Gel“: Charging Program for Gel Batteries, Characteristic Line IU1oU2
Adapted to closed, gas-tight gel/dryfit batteries with determined electrolyte, which are generally requiring a higher charging voltage level and longer dwell times U1 to achieve short charging times with particularly high capacity storage and to avoid total discharge. Also recommended for EXIDE MAXXIMA a high-current battery in AGM filament technology.

2 „AGM“: Charging Program for AGM/Fleece Batteries, Characteristic Line IU1oU2
Adapted to charging closed, gas-tight AGM (absorbed glass mat) batteries and batteries in lead-fleece technology requiring a particularly high level U1 with adapted dwell times for full charging and after that a moderate level U2 for trickle charge (round cell and plate technology).

4 „UNIVERSAL“: Charging Program for Lead, Acid/Lead-Acid Batteries: Characteristic Line IU1oU2oU3
Universal program for charging and conservation of charge of acid batteries in vehicles (mixed operation mobile/stationary). Still offers short charging times, good charging factor and good acid mixing with average level U1 for open and closed, low-maintenance, maintenance-free standard, drive, lighting, solar and heavy duty batteries.

Technical Features

BR Automatic battery regeneration   FB Connection remote control / remote indicator
DC Power pack function (battery replacement)   Kap Battery capacity (size) adjustable
LV Charging current distributor
for one or several batteries
  PL Power limit funktion
(Reduction of the mains/charging capacity)
SR Silent run funktion (reduction at night)   TK Temperature compensation
VF Voltage sensor
(in case of very long charging cables)
  Tropfen  Electronic system humidity-proof 


Anleitung Katalog


Fernbedienung S Ladegeraete 2075

  Betriebs Fernanzeige IP67    Batterie-Status-Anzeige 2082

Remote Indicator IP67 (Art. 2081)

Charger State Monitor IP67 (Art. 2082)

Temp Sensor 2001  

Remote Control S (Art. 12075)

Temperature Sensor 825 (Art. 2001)



Standard version:
Automatic Charger Pb 2425 SMT 3B
  (Art. 6239)


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