Model C2196A PT L50C-D Dual PSU/Battery Charger0 pages

PTL50C-D Dual Voltage PSU/Battery Charger
Model C2196A 2Amp 12 & 24Volt Combined Power Supply/ Battery Charger

DATASHEET
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Supply both 12Vdc and 24Vdc continuous
power during ac line interruptions without the
need for inverters or mains UPS

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Ideal for RTU’s, dataloggers, remote field
instrumentation, alarm systems, etc. where
24Volts is required for instrumentation and
12Volts is required for radios etc.

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Battery Management Functions include Low
Voltage Cut-out, temperature compensation
and current limited battery charging

FEATURES
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True 12/24Volt Split Battery Charge Equalisation
Under-voltage cut-out to protect battery from deep
discharge.
AC detect output for mains monitoring.

OVERVIEW
The PTL50C-D is a combined Power Supply and Battery
Charger for small uninterruptible instrument supply
applications where 12Volts and 24Volts are required.
Providing both 24Volts and 12Volts in battery-backed
systems can be inconvenient and costly. While 12Volts is
available in 24Volt 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 PTL50C-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
12Volts loads are tapped from the battery pack.
Applications include RTU’s, dataloggers, remote field
instruments and alarm systems where the requirement
exists to power both 12Volt radios and 24Volt
instruments.
BATTERY MANAGEMENT
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.

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Temperature compensation for optimum battery
float voltage in changing ambient temperatures.
Universal 85-264Vac mains supply
DIN Rail mounting with small panel footprint
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.
DUAL MODE CHARGING
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.
SYSTEM MONITORING
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.

Copyright Omniflex ♦ Subject to change without notice

Datasheet DSC2196AR06 sheet 1 of 4

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