The Powerterm L-series provides 5 A peak load capability on both supplies, capable of driving radios at 12V and power loads at 24V without the additional power, cost and space associated with an additional voltage converter. This provides balanced charging to both 24V and 12V batteries, even when 12V loads are tapped from the battery pack.
Other features, such as integrated AC main detected relay, temperature compensated charging and low voltage cut-out, ensure a fully specified charging system in a single product. The Powerterm L120C-D charger is the only charger component required for the system, reducing space and cost.
The Powerterm dual-voltage PSU chargers are the ideal solution for applications that include remote terminal units, dataloggers, remote field instruments and alarm systems where the requirement exists to power both 12V equipment, such as radios, and 24V instruments.
RTU's are increasingly surrounded by more and more instrumentation required to operate at 24V, while the radio system still requires 12V for operation. This gives the system designer a dilemma in single charger systems.
If one adds an extra converter to convert 12V to 24V, then the 24V power will be limited to the power of the converter, which must be sized large enough for peak-load requirements. If you are driving solenoids or power relays, this can result in a large converter, which places a continuous drain on the system, reducing standby time from the batteries, and consuming additional cost and space.
If you add an extra converter to convert 24V to 12V to drive a radio, you need to be sure that the converter output is rated for the peak transmit power required by the radio. Most radios are designed to be operated off battery supplies, and expect a 'stiff' supply for efficient radio frequency performance.
The choice of the wrong converter for this application presents a risk, which the dual-voltage Powerterm L charger series can resolve.