This is a product manual for a Casio digital piano, which introduces the safety precautions for using the product.

This document is about the user manual of Casio PX300-CK-1 CK digital piano. The manual provides information on the safety precautions and features of the digital piano.

EKL-4 short circuit ground fault indicator is a real-time monitoring device, which is installed in the ring network system of ring network switch, cable branch box and box transformer, and used to indicate short circuit and single-phase grounding faults in the corresponding cable section.

ZBC series battery charging module 300W is a small, high efficiency, stable performance, original and secondary side isolated, high isolation strength charging module power supply. The product has output short circuit, overheating, overvoltage and other protection functions. In addition, the product has charging function, which can charge the external 48V battery. In case of AC power failure, the battery can continuously supply power to the load. It has the function of preventing battery overdischarge. It has the state display of power supply. It has the battery activation function, which can be manually activated or activated automatically by external signal for battery maintenance. This power supply is suitable for power distribution automation system, intelligent box transformer, ring network cabinet and other industries with high requirements for uninterruptible DC power supply.