The 27V DC power supply unit utilizes high-frequency power technology, and the battery is maintained with an automatic charging management module, significantly extending the battery's lifespan and ensuring safer and more reliable operation. The unit is equipped with communication and alarm functions, enabling easy remote automated management without the need for on-site supervision. Basic functions of the 27V DC power supply include:
(1) Conversion of energy into devices
In the presence of external power, the 27V DC distributed power supply provides energy for battery charging while simultaneously supplying energy to long-running loads; during energy storage and switching operations, a greater load energy requirement is supplied by the battery.
During input power failure, the battery supplies all the energy to the output.
(2) Automated Management
The 27V DC power supply distributed system utilizes a microcontroller for intelligent charging and discharging management of the battery pack, featuring timed automatic equalization charging and automatic transition to float charging. It can conduct self-inspection of the device at any time, and provides both a built-in buzzer alarm and an external alarm signal contact output. It can also communicate with the host computer, suitable for both attended and unattended power distribution systems.
The internal temperature of the distributed 27V DC power supply automatic detection device is monitored. When the internal temperature exceeds the set threshold, the fan is automatically activated for cooling, protecting the internal components. Once the temperature drops back to normal, the fan is automatically turned off to reduce power consumption.
Signal Output
The distributed power supply features a normally closed relay output interface. When the device is powered on, the signal output is synchronized with the internal buzzer alarm signal. If the entire device is without power, such as when the device is damaged or the AC input switch is turned off, the output will close to emit an alarm signal. Users can add a noise-suppression circuit to the signal output loop.
Alarm Function
The 27V DC power supply with distribution internally features a small buzzer that emits an alarm signal in the following situations:
In the event of an AC power failure or insufficient input power for the 27V DC distributed power supply, the device will emit an alarm after several seconds to alert users of the AC power outage. The alarm signal can be reset by pressing the "Cycle/Stop" button or will automatically reset when the AC input is restored.
If the battery voltage falls below a certain threshold, the device will emit an alarm signal, notifying the user of low battery voltage. The alarm signal can be reset by pressing the "Cycle/Stop" button, or it will automatically clear after charging the battery to a level above the alarm point when AC input is normal. After a certain period of low battery voltage, the entire device (including DC output) will be disconnected to prevent over-discharge of the battery. However, the buzzer and alarm light will continue to alarm, and the dry contact will provide an alarm signal. The ZXT power supply unit will automatically resume operation after the power is restored.
When a short circuit occurs in the load, or the load is too heavy, or the device itself malfunctions, an alarm will be triggered. This signal is non-recoverable, indicating to the user to shut down the device for load circuit inspection. If there is no short circuit in the load circuit or the load power is too high, it may indicate a malfunction in the device itself.
