Shop DIN-rail DC UPS systems designed to maintain DC control power during interruptions to the normal electrical source. These systems are commonly used with PLCs, industrial computers, communication equipment, instrumentation and other critical automation devices.
Compare DC UPS systems by nominal DC voltage, load current, battery capacity, backup runtime, charging current, mounting width and communication features. The battery and UPS must both be sized for the connected load and required backup duration.
A DC UPS maintains a regulated DC bus when the normal source is lost. Depending on the system architecture, it may work with an industrial power supply, integrated charger and external battery to keep PLCs, controls and communication equipment operating during an outage.
The required battery capacity depends on the DC load and desired backup time. Battery performance also varies with temperature, age and discharge rate, so critical applications should include suitable operating margin.
A DC UPS maintains DC power directly for control equipment, avoiding the need to convert battery power back into AC before supplying DC loads. This can be useful in control panels where most critical devices already operate from a common DC bus.