1. Introducció i finalview
The MOXA MGate MB3270-T is a 2-port advanced Modbus TCP to Serial communication gateway designed for industrial applications. It facilitates seamless communication between Modbus TCP hosts and Modbus RTU/ASCII serial devices. This gateway supports RS-232, RS-422, and RS-485 serial interfaces, offering versatile connectivity options. Its robust design allows operation in a wide temperature range from -40°C to +75°C, making it suitable for harsh industrial environments.
This manual provides essential information for the proper installation, configuration, operation, and maintenance of your MGate MB3270-T gateway.
2. Informació de seguretat
- Seguretat elèctrica: Ensure all power connections are made by qualified personnel. Disconnect power before servicing or installing the device.
- Condicions ambientals: Operate the device within the specified temperature and humidity ranges. Avoid exposure to excessive moisture, dust, or corrosive substances.
- Muntatge: Securely mount the device to prevent accidental dislodgement.
- Posada a terra: Proper grounding is essential for safe operation and protection against electrical interference.
- Ventilació: Assegureu-vos que hi hagi un flux d'aire adequat al voltant del dispositiu per evitar el sobreescalfament.
3. Contingut del paquet
Si us plau, verifiqueu que el vostre paquet contingui els elements següents:
- MOXA MGate MB3270-T Gateway Unit
- Guia d'instal·lació ràpida
- Targeta de garantia
- Terminal Block for Power Input
- Kit de muntatge a la paret (si escau)
Si algun d'aquests articles falta o està malmès, poseu-vos en contacte amb el vostre representant de vendes immediatament.
4. Característiques del producte
- Conversió de protocols: Converts Modbus TCP to Modbus RTU/ASCII.
- Ports sèrie: Two independent serial ports supporting RS-232, RS-422, and RS-485.
- Ports Ethernet: Dual 10/100BaseT(X) Ethernet ports for network redundancy or cascading.
- Ampli rang de temperatures: Operates reliably from -40°C to +75°C.
- Disseny industrial: Rugged casing suitable for harsh industrial environments.
- Indicadors LED: Status LEDs for power, ready, and port activity.
5. Configuració
5.1 Instal·lació física
The MGate MB3270-T can be DIN-rail mounted or wall-mounted. Ensure the mounting location provides adequate ventilation and is within the specified operating temperature range.
- Muntatge: Attach the device securely using the provided mounting kit.
- Connexió d'alimentació: Connect a 12-48 VDC power source to the terminal block. Ensure correct polarity. The device supports redundant power inputs (PWR1, PWR2).
- Posada a terra: Connect the grounding screw to a proper earth ground.
5.2 Connecting to Network and Serial Devices
Consulteu la imatge següent per identificar el port.

Figura 1: Davant view of the MOXA MGate MB3270-T gateway. This image displays the two Ethernet ports labeled 'Ethernet 1' and 'Ethernet 2', along with LED indicators for 'PWR1', 'PWR2', 'RDY', 'P1', and 'P2'. The MOXA logo and 'MGate MB3270I' model name are also visible.
- Connexió Ethernet: Connect your Modbus TCP host (e.g., PC, PLC) to either 'Ethernet 1' or 'Ethernet 2' port using a standard Ethernet cable.
- Connexió en sèrie: Connect your Modbus RTU/ASCII serial devices to the serial ports. The device features a removable terminal block for serial connections. Ensure correct wiring for RS-232, RS-422, or RS-485 as per your device requirements.
5.3 Configuració inicial
The MGate MB3270-T can be configured via a web browser or a dedicated utility. The default IP address is typically 192.168.1.254. Refer to the Quick Installation Guide for detailed steps on accessing the web console and initial network settings.
6. Instruccions de funcionament
6.1 Indicadors LED
Els LED del panell frontal proporcionen informació d'estat:
- PWR1/PWR2 (Verd): Indicates power input status. Lit when power is supplied to the corresponding input.
- RDY (Green): Indicates the device is ready for operation. Lit when the system has booted successfully.
- P1/P2 (Green/Orange): Indicates serial port activity. Green for transmit, Orange for receive.

Figura 2: En angle view of the MOXA MGate MB3270-T gateway. This perspective highlights the side profile of the device, including the top-mounted terminal block for power and serial connections, and the front panel with Ethernet ports and LED indicators.
6.2 Comunicació Modbus
Once configured, the MGate MB3270-T acts as a transparent bridge between Modbus TCP and Modbus RTU/ASCII. Modbus TCP requests from the host are converted and forwarded to the serial devices, and responses from serial devices are converted back to Modbus TCP for the host.
- Ensure the Modbus ID, baud rate, data bits, parity, and stop bits are correctly configured on both the gateway and the serial devices.
- The gateway supports various Modbus operating modes, including Master and Slave modes for serial ports, and Client/Server modes for TCP.
7. Manteniment
- Neteja: Periodically clean the device exterior with a soft, dry cloth. Do not use liquid or aerosol cleaners.
- Actualitzacions de firmware: Comproveu el del fabricant website for available firmware updates to ensure optimal performance and security. Follow the provided instructions carefully for firmware upgrades.
- Inspecció del cable: Regularly inspect all connected cables for damage or loose connections.
8. Solució De Problemes
- Sense energia: Check power connections and ensure the power supply is functioning. Verify PWR1/PWR2 LEDs are lit.
- Sense connectivitat de xarxa: Check Ethernet cable connections. Verify network settings (IP address, subnet mask, gateway). Ensure the Ethernet link/activity LEDs are blinking.
- Sense comunicació en sèrie: Verify serial cable connections and pin assignments. Check serial port settings (baud rate, data bits, parity, stop bits) on both the gateway and the serial device. Ensure P1/P2 LEDs indicate activity.
- Modbus Communication Errors: Confirm Modbus ID settings. Check for Modbus function code support. Review Modbus master/slave or client/server configurations.
- El dispositiu no respon: Try power cycling the device. If issues persist, perform a factory reset (refer to the full user manual for instructions).
9. Especificacions
| Característica | Especificació |
|---|---|
| Fabricant | MOXA |
| Número de model | MG3270 |
| ASIN | B07CGRH9DT |
| Ports sèrie | 2 (RS-232/422/485 selectable) |
| Ports Ethernet | 2 x 10/100BaseT(X) |
| Temperatura de funcionament | -40 °C a +75 °C |
| Data de primera disponibilitat | 17 d'abril de 2018 |
10. Garantia i Suport
MOXA products typically come with a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included in your package or visit the official MOXA website. For technical support, product documentation, and driver downloads, please visit the MOXA support portal or contact their customer service directly.
Fabricant: MOXA
Weblloc: www.moxa.com





