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Model C2197B PT L120C-D Dual PSU/Battery Charger

Model C2197B PT L120C-D Dual PSU/Battery Charger
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Model C2197B PT L120C-D Dual PSU/Battery Charger - 1

Powerterm L120C-D Dual Voltage PSU/Battery Charger Model C2197B 120W 12/24Volt Power Supply/ Battery Charger Supply both 12Vdc 1Amp and 24Vdc 3 Amps average power to loads in a single product. Ideal for RTU’s, dataloggers, remote field instrumentation, alarm systems, etc. where 24Volts is required for instrumentation and 12Volts is required for radios etc. Battery Management Functions include Low Voltage Cut-out, temperature compensation and current limited dual mode battery charging . 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 Powerterm L120C-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 standby systems can be inconvenient and costly. While 12Volts is available in 24Volt battery systems by centre-tapping the two series connected 12Vdc batteries, this has been impractical to use until now because of the different charging requirements of the two batteries. The unique PTL120C-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 set. The Powerterm L120C-D is the only charger component required for the system , reducing space and cost. And unlike the use of 24V to 12V converters, the 12Volt load is connected to the battery, providing a low impedance supply required by some radio transmitters. This configuration also allows larger currents to be drawn intermittently from the 12Volts such as radio transmit currents which can be much larger than the average current required when receiving. Applications include RTU’s, dataloggers, remote field instruments and alarm systems where the requirement exists to power both 12Volt equipment (s uch as 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. Temperature compensation for optimum battery float voltage in changing ambient temperatures. Universal 85-264Vac mains supply DIN Rail mounting with small panel footprint The PTL120C-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 PTL120C-D is provided with external temperature compensation so that the float voltage to the batteries is held at its optimum value at all times. Use Model C0003 Temperature probe (supplied separately). DUAL MODE CHARGING 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 PTL120C-D 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. SYSTEM MONITORING The PTL120C-D provides an AC OK contact output. This output can be used to detect power failures without the need for an additional mains detection relay. BATTERY TESTING Using the Test Input, the health of the batteries can be checked. This function can be included in programmable remote equipment for highest availability of the standby system. Copyright Omniflex ♦ Subject to change without notice

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Model C2197B PT L120C-D Dual PSU/Battery Charger - 2

Powerterm L120C-D Dual Voltage PSU/Battery Charger Model C2197B 120W 12/24Volt Power Supply/ Battery Charger Typical System Connection Diagram Battery Charge Control Temp Model C0003 Temperature Sensor. Mount close to Batteries Mechanical Details Copyright Om niflex ♦ Subject to change without notice

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Model C2197B PT L120C-D Dual PSU/Battery Charger - 3

Powerterm L120C-D Dual Voltage PSU/Battery Charger Model C2197B 120W 12/24Volt Power Supply/ Battery Charger Specifications AC Input AC input voltage range AC input frequency Input current at full load Switch-on inrush current Surge wihstand t Fast Transients TEST Input 85-264Vac 47-63 Hz <2.2A rms at 115Vac <1.5A rms at 230Vac 8A for <10ms 2.5kA 8/20us pulse 40 joules max. 2 kV Type Max. open circuit voltage Max. closed circuit current Test Voltage Test Method Voltage change from 20°C Maximum load output voltage range over all conditions of battery, temperature and AC input. Maximum...

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Model C2197B PT L120C-D Dual PSU/Battery Charger - 4

Powerterm L120C-D Dual Voltage PSU/Battery Charger Model C2197B 120W 12/24Volt Power Supply/ Battery Charger Application Notes BATTERY CONSIDERATIONS The PTL120C-D is designed to operate with sealed lead acid (SLA) type batteries also known as Valve Regulated Lead Acid (VRLA) batteries. This type of battery is sealed except for a valve that opens when the internal gas pressure exceeds safe limits. (That is why it is important not to overcharge SLA batteries). Generally, these batteries can be used in confined areas and can be mounted in any orientation. (see the specific manufacturer’s data...

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Model C2197B PT L120C-D Dual PSU/Battery Charger - 5

Powerterm L120C-D Dual Voltage PSU/Battery Charger Model C2197B 120W 12/24Volt Power Supply/ Battery Charger When the AC supply returns, the cut-out relay will automatically reconnect the batteries. A red light labelled ‘DC’ on the front of the PTL120C- D when on, indicates that there is DC supply to the load. During battery backup, the Green lamp will be off and the Red lamp will be on. After the battery has been disconnected by the cut-out, both lamps will be off. These states are shown in this table below: AC Batteries are connected and AC is on. Mains has failed & load is powered from...

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