The most common use. With an 18V-24V laptop brick as an input, it provides a versatile 0-30V 5A DC supply.

A factory reset does NOT delete user fingerprints or cards. To erase all data, use Menu → System → Clear All Data .

The is a versatile digital control laboratory power supply module. It delivers an adjustable output voltage range of 0.6V to 36V and a maximum current of 5A , supporting workloads up to 80W .

The ZK5KX manual offers guidance on troubleshooting and maintenance, including:

Default 4.8V. The module turns off if the input voltage drops below this.

| Error Code | Display Message | Meaning | Solution | |------------|----------------|---------|----------| | E-01 | "Battery Low" | Internal RTC battery is below 2.5V | Replace CR2032 battery on mainboard. | | E-08 | "Network Timeout" | DHCP or static IP unreachable | Check cable, switch port, or firewall rules (port 4370). | | E-12 | "Fingerprint Mismatch" | Scanner cannot verify against template | Clean sensor with microfiber cloth. Re-enroll user. | | E-23 | "Memory Full" | Log storage exceeded 95% | Export and delete logs via USB. | | E-34 | "Duplicate ID" | User ID already in database | Use a unique ID or delete the conflicting user first. |

Press the to switch specifically to the constant current (CC) value setting.

Note: Calibration can be tricky and requires a precise multimeter for reference. 4. Advanced Features and Protections