Product Brief - Model C2299A PT L120CS Safe PSU/Battery Charger

PT L120CS PSU & BATTERY CHARGER 110/240ac; 12V 8A or 24V 6A

picarrow Under-voltage cut-out to protect battery from deep discharge
arrow AC detect output for mains monitoring
arrow Temperature compensation for optimum battery float voltage
arrow Universal 85-264Vac mains supply
arrow DIN Rail mounting with small panel footprint
arrow Safe mains socket for easy maintenance swaps

The PT L120CS is a combined Power Supply with Safe AC connector & Battery Charger for small uninterruptible instrument supply applications where battery backed 12Volts is required. Safe mains connection through IEC320-C5 "clover leaf" AC input socket


The Powerterm L120CS is a combined Power Supply and Battery Charger for small uninterruptible instrument supply applications where 12Volts or 24Volts are required.

  • C2299A-1 for 12V Application
  • C2299A-2 for 24V Application

Applications include RTUs, dataloggers, remote field instruments and alarm systems where the requirement exists to power 12Volt equipment (such as radios) or 24Volt instruments.


During prolonged power outages, the back-up batteries will eventually discharge. If the load remains connected, the batteries can enter their deep discharge phase, which can cause irreparable damage to the batteries, and reduce their capacity and life expectancy.

The PTL120CS incorporates a low voltage cut-out that disconnects the loads when  battery voltage falls below its low voltage threshold.

The maximum float voltage necessary to ensure full charge, but not overcharge, is temperature dependent for lead-acid batteries. If the installation is in an environment with widely fluctuating temperature, then fixed voltage chargers will either under-charge or over-charge the batteries.

The PTL120CS is provided with external temperature compensation so that the float voltage to the battery is held at its optimum value at all times. Use Model C0003 Temperature probe (supplied separately).


All sealed lead acid battery manufacturers specify a maximum charging current for the correct life and safe operation of sealed lead acid batteries. This maximum charging current for a battery is based upon the Ampere-hour capacity of the battery. Many conventional switch mode power supplies do not control their maximum delivered current and can cause batteries to be charged from flat with current levels that exceed the manufacturer's recommendation. The PTL120CS provides dual-mode charging, with a well defined battery current limit, so that even when the batteries are discharged, the charging current will be controlled.


The PTL120CS provides an AC OK contact output. This output can be used to detect power failures without the need for an additional mains detection relay.


Using the Test Input, the health of the battery can be checked. This function can be included in programmable remote equipment for highest availability of the standby system.

Further Literature 
Full specifications and Order Information
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