1. Introducción
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 del producto
The ZK-F28 system incorporates several key features to ensure efficient and secure operation:
- Capacidad de huella digital: 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.
- Funciones estándar: Includes SMS messaging and DLST (Daylight Saving Time) support.
- Interfaz de control de acceso: Provides connections for 3rd party electric locks, door sensors, exit buttons, alarms, and door bells.
- Mostrar: Features a B&W LCD Screen for user interaction.
- Señal Wiegand: Supports Wiegand Output for integration with other access control systems.
3. Contenido del 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. Exceso de físicoview y dimensiones
4.1 Disposición del dispositivo

Figura 4.1: Frente 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 Dimensiones

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 y configuración
5.1 Montaje del 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 conexiones 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.
- Fuente de alimentación: Connect a 12V DC power source to the designated power input terminals. Ensure the power supply meets the device's requirements.
- Red (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.
- Interfaz de control de acceso:
- Cerradura 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 puerta: Connect the door sensor to monitor the door's open/closed status.
- Botón de salida: 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 de la puerta: Connect a doorbell for visitor notification.
- Salida 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. Operación
6.1 Navegación por la interfaz 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.
Utiliza las las teclas de flechas (▲, ▼, ◀, ▶) to navigate through menu options and the M/OK Botón para confirmar selecciones. El ESC button is used to go back to the previous screen or exit a menu.
6.2 Gestión 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 Gestión de los 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. Mantenimiento
7.1 Limpieza del 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 actualizaciones de firmware
Revise periódicamente las instrucciones del 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 seguridad 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 | Posible causa | Solución |
|---|---|---|
| El dispositivo no se enciende | No hay fuente de alimentación; adaptador de corriente defectuoso; conexión suelta. | Check power adapter and cable connections. Ensure power outlet is functional. |
| Huella dactilar no reconocida | 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 de red | Incorrect IP settings; faulty Ethernet cable; network device issues. | Verify IP address, subnet mask, and gateway settings. Check Ethernet cable. Restart network devices. |
| La puerta no se desbloquea | Incorrect wiring; lock malfunction; access permissions not granted. | Check wiring to the electric lock. Test the lock independently. Verify user's access permissions. |
9. Especificaciones
Detailed technical specifications for the ZK-F28 Fingerprint Time Clock and Access Controller System:
| Característica | Especificación |
|---|---|
| Capacidad de huellas dactilares | 2,200 plantillas |
| Capacidad de transacción | 50,000 registros |
| Plataforma de hardware | ZEM500 |
| Sensor | Sensor óptico |
| Versión de algoritmo | Finger v9.0 |
| Comunicación | RS232/485, TCP/IP |
| Funciones estándar | SMS, DLST, Automatic Status Switch, Self-Service Query |
| Funciones opcionales | Web server, Work code, 9 digit user ID, Soap, printer |
| Interfaz de control de acceso para | 3rd party electric lock, door sensor, exit button, alarm, Door Bell |
| Señal Wiegand | Producción |
| Mostrar | B&W LCD Screen |
| Fuente de alimentación | 12 V CC |
| Temperatura de funcionamiento | 0 ℃ - 45 ℃ (32 ℉ - 113 ℉) |
| Humedad de funcionamiento | 20% - 80% |
| Dimensiones (An*Al*Pr) | 90 mm x 190 mm x 39.5 mm |
| Peso bruto | 0.9 kilos |
| Número de modelo del artículo | ZK-F28 |
10. Garantía y soporte
10.1 Información de 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 al 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.





