Product Brief - Model C2196A Powerterm L50C-D Dual PSU/Chgr AC

Powerterm L50C-D Dual PSU/Chgr AC

picarrow True 12/24Volt Split Battery Charge Equalisation
arrow Under-voltage cut-out to protect battery from deep discharge.
arrow AC detect output for mains monitoring.
arrow Universal 85-264Vac mains supply
arrow DIN Rail mounting with small panel footprint
arrow Temperature Compensated Float Voltage under ambient changes

Powerterm L50C-D 85-264Vac. 24Vdc 2A Load 12Vdc 1A Load Battery Backed instrument power supply/charger. DIN Rail mount.

The L50C-D is a combined Power Supply and Battery Charger for small uninterruptible instrument supply applications where 12 Volts and 24 Volts are required.

Providing both 24 Volts and 12 Volts in battery-backed systems can be inconvenient and costly. While 12 Volts is available in 24 Volt battery systems by centre-tapping the two series connected 12Vdc batteries, until now this has been impractical to use because of the different charging requirements of the two batteries.

The L50C-D dual voltage charger now makes this possible by the provision of true split rail battery charging to provide balanced charging to both batteries even when 12 Volts loads are tapped from the battery pack.

Applications include RTUs, dataloggers, remote field instruments and alarm systems where the requirement exists to power both 12 Volt radios and 24 Volt instruments.

This DIN rail mounted product is ideal for providing 24Vdc power to instrument systems and 12V Power to battery powered radios.

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 PTL50C-D incorporates a low voltage cut-out that disconnects the loads when either 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 PTL50C-D is provided with temperature compensation so that the float voltage to the batteries is held at its optimum value at all times.

Batteries can be kept on continuous charge as long as the charging current and float voltage are kept below their specified maximum values. The 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 PTL50C-D provides dual-mode charging, with a well defined current limit in boost mode, so that even when the batteries are discharged, the charging current will be controlled.

The PTL50C-D also provides an "AC OK" output. This output can be used to detect power failures without the need for an additional mains detection relay.

Further Literature 
Full Specification and Order Information
Technical Note
Technical information on battery selection and charging
RoHS Compliance Certificate
RoHS Compliance Certificate with a list of RoHS Compliant Products
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Combined Power Supply & Battery Charger for applications requiring both 12V and 24V loads
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