1. Introdución
This manual provides comprehensive instructions for the installation, configuration, operation, and maintenance of the Generic ZK-F28 Fingerprint Time Clock and Access Controller System. The ZK-F28 is designed to offer reliable fingerprint-based time attendance and access control functionalities for various environments.
2. Características do produto
The ZK-F28 system incorporates several key features to ensure efficient and secure operation:
- Capacidade de impresión dixital: Supports up to 2,200 fingerprint templates.
- Transaction Capacity: Stores up to 50,000 transaction records.
- Plataforma de hardware: Utilizes the ZEM500 platform for stable performance.
- Sensor: Equipped with a high-quality Optical Sensor for accurate fingerprint recognition.
- Comunicación: Offers versatile connectivity options including RS232/485 and TCP/IP.
- Funcións estándar: Includes SMS messaging and DLST (Daylight Saving Time) support.
- Access Control Interface: Provides connections for 3rd party electric locks, door sensors, exit buttons, alarms, and door bells.
- Visualización: Features a B&W LCD Screen for user interaction.
- Wiegand Signal: Supports Wiegand Output for integration with other access control systems.
3. Contido do paquete
The package typically includes the ZK-F28 Fingerprint Access Control Machine. Please verify the contents upon receipt against the packing list provided by your supplier. Additional accessories such as power adapters, mounting hardware, and connection cables may be included or sold separately.
4. Sobrecarga físicaview e Dimensións
4.1 Disposición do dispositivo

Figura 4.1: Fronte View of ZK-F28. This image displays the front panel of the ZK-F28, featuring the monochrome LCD screen at the top, a numeric keypad for input, and the optical fingerprint scanner located at the bottom. An 'M/OK' button and navigation arrows are also visible on the keypad.

Figura 4.2: Atrás View of ZK-F28. This image illustrates the rear panel of the ZK-F28, detailing the various wiring terminals for power, network, and access control components. A serial number label is also visible, along with regulatory markings.
4.2 Dimensións

Figure 4.3: ZK-F28 Dimensions. This diagram provides the physical dimensions of the ZK-F28 device. The approximate dimensions are 90mm (width) x 190mm (height) x 39.5mm (depth).
5. Instalación e configuración
5.1 Montaxe do dispositivo
Select a suitable location for mounting the ZK-F28, typically near the door it will control or in a central location for time attendance. Ensure the mounting surface is stable and at an appropriate height for user access. Use the provided mounting template (if any) and hardware to secure the device firmly to the wall.
5.2 Conexións de cableado
Proper wiring is crucial for the functionality of the ZK-F28. Refer to the wiring diagram below and the labels on the back of the device for correct connections.

Figure 5.1: System Configuration Diagram. This diagram illustrates how the ZK-F28 connects to various components, including a PC via TCP/IP, a network router, an electric lock, a door sensor, an alarm, and an exit button. A USB key connection is also shown for data transfer.
- Fonte de alimentación: Connect a 12V DC power source to the designated power input terminals. Ensure the power supply meets the device's requirements.
- Network (TCP/IP): Connect an Ethernet cable from the device's RJ45 port to your network switch or router for network communication and data transfer.
- Serial Communication (RS232/485): For serial communication, connect the appropriate RS232 or RS485 cables to the corresponding terminals.
- Access Control Interface:
- Fechadura eléctrica: Connect the electric lock to the NO (Normally Open) or NC (Normally Closed) and COM (Common) terminals as required by your lock type.
- Sensor de porta: Connect the door sensor to monitor the door's open/closed status.
- Botón de saída: Connect an exit button to allow authorized personnel to exit without fingerprint verification.
- Alarma: Connect an external alarm system to trigger alerts based on security events.
- timbre da porta: Connect a doorbell for visitor notification.
- Saída Wiegand: If integrating with another access control panel, connect the Wiegand output terminals.
5.3 Encendido inicial
After all connections are securely made, apply power to the device. The device will boot up, and the LCD screen will display the startup sequence. Follow the on-screen prompts for initial configuration, which may include setting the date, time, and network parameters.
6. Funcionamento
6.1 Navegación da interface de usuario
The ZK-F28 features a user-friendly interface accessible via the LCD screen and keypad.

Figure 6.1: Main Menu Screen. This image displays the main menu of the ZK-F28, presenting various icons for different functions such as User Management, Communication settings, System settings, Data Management, and Access Control.
Use as teclas de frecha (▲, ▼, ◀, ▶) to navigate through menu options and the M/OK para confirmar as seleccións. O botón ESC button is used to go back to the previous screen or exit a menu.
6.2 Xestión de usuarios
To enroll new users, access the 'User Mgt' menu. You can register fingerprints, assign user IDs, and set user roles (e.g., administrator, general user). Follow the on-screen instructions for fingerprint enrollment, ensuring the finger is placed correctly on the scanner for optimal recognition.
6.3 Time Attendance Functions
For time attendance, users simply place their registered finger on the scanner. The device will record the time and display a confirmation message. The system automatically switches status (e.g., In/Out) based on configured settings or manual selection.
6.4 Access Control Functions
When used for access control, a successful fingerprint verification will trigger the electric lock to open for a predefined duration. The device can be configured to operate in various access modes (e.g., fingerprint only, password only, or a combination).
6.5 Xestión de datos
Attendance and access logs can be downloaded from the device. This can be done via the TCP/IP network connection using compatible software (e.g., ZKAccess 3.5) or by exporting data to a USB flash drive through the 'USB Manager' menu option.
7. Mantemento
7.1 Limpeza do dispositivo
Regular cleaning helps maintain optimal performance. Use a soft, dry cloth to wipe the device's exterior. For the fingerprint sensor, use a lint-free cloth lightly dampened with isopropyl alcohol to gently clean the surface. Avoid abrasive cleaners or spraying liquids directly onto the device.
7.2 Actualizacións de firmware
Comprobe periodicamente o fabricante website for available firmware updates. Firmware updates can improve performance, add new features, or fix bugs. Follow the provided instructions carefully when performing a firmware update to avoid damaging the device.
7.3 Copia de seguranza de datos
It is highly recommended to regularly back up attendance and access log data to prevent data loss. Data can be backed up to a computer via network connection or to a USB flash drive.
8 Solución de problemas
This section addresses common issues you might encounter with the ZK-F28 system.
| Problema | Causa posible | Solución |
|---|---|---|
| O dispositivo non se acende | Sen fonte de alimentación; adaptador de corrente defectuoso; conexión solta. | Check power adapter and cable connections. Ensure power outlet is functional. |
| Non se recoñece a pegada dixital | Finger wet/dirty; sensor dirty; finger not placed correctly; fingerprint not enrolled. | Ensure finger and sensor are clean and dry. Place finger flat on the sensor. Re-enroll fingerprint if necessary. |
| Problemas de conexión á rede | Incorrect IP settings; faulty Ethernet cable; network device issues. | Verify IP address, subnet mask, and gateway settings. Check Ethernet cable. Restart network devices. |
| Porta non se abre | Incorrect wiring; lock malfunction; access permissions not granted. | Check wiring to the electric lock. Test the lock independently. Verify user's access permissions. |
9. Especificacións
Detailed technical specifications for the ZK-F28 Fingerprint Time Clock and Access Controller System:
| Característica | Especificación |
|---|---|
| Capacidade de impresión dixital | 2,200 modelos |
| Capacidade de transacción | 50,000 rexistros |
| Plataforma de hardware | ZEM500 |
| Sensor | Sensor óptico |
| Versión do algoritmo | Dedo v9.0 |
| Comunicación | RS232/485, TCP/IP |
| Funcións estándar | SMS, DLST, Automatic Status Switch, Self-Service Query |
| Funcións opcionais | Web server, Work code, 9 digit user ID, Soap, printer |
| Interface de control de acceso para | 3rd party electric lock, door sensor, exit button, alarm, Door Bell |
| Sinal Wiegand | Saída |
| Mostrar | B&W LCD Screen |
| Fonte de alimentación | 12V DC |
| Temperatura de funcionamento | 0 ℃ - 45 ℃ (32 ℉ - 113 ℉) |
| Humidade de funcionamento | 20% - 80% |
| Dimensión (W*H*D) | 90 mm * 190 mm * 39.5 mm |
| Peso bruto | 0.9 kg |
| Número de modelo do artigo | ZK-F28 |
10. Garantía e soporte
10.1 Información da garantía
Warranty terms and conditions for the ZK-F28 device are typically provided by the seller or manufacturer at the time of purchase. Please refer to your purchase documentation or contact your vendor directly for specific warranty details, including coverage period and claims procedures.
10.2 Atención ao cliente
For technical assistance, troubleshooting beyond this manual, or service inquiries, please contact the seller or the manufacturer's customer support department. Have your product model number (ZK-F28) and purchase details ready when contacting support.





