The Moxa MGate MB3170 and MB3270 Series are advanced 1- and 2-port Modbus gateways designed to convert between Modbus TCP and Modbus RTU/ASCII protocols. These industrial-grade gateways support serial-to-Ethernet as well as serial master-to-serial slave communication, making them ideal for mixed network environments where legacy serial devices must integrate with modern TCP/IP systems.

Featuring support for up to 32 Modbus TCP clients and 32 TCP servers, as well as simultaneous access by serial and Ethernet masters, the MB3170/MB3270 offers unmatched flexibility. Auto Device Routing simplifies setup by auto-generating slave routing tables, while the emergency request tunnel and priority command handling ensure reliable performance under load.

Fiber models provide up to 40 km transmission via optical cable, offering enhanced noise immunity and safety in hazardous areas. The optional "-I" variants come with 2 kV isolation, ensuring stable operation in demanding electrical environments. The gateways are DIN-rail mountable and operate in wide temperature ranges for maximum industrial reliability.

Technical Details:

Network Interfaces:

• Ethernet: 2 x 10/100BaseT(X), RJ45, Auto MDI/MDI-X, 1.5 kV isolation
• Optional: 100BaseFX fiber (Multimode up to 4 km, Singlemode up to 40 km)

Protocols:

• Modbus TCP Client/Server
• Modbus RTU/ASCII Master/Slave
• Transparent mode

Routing & Management:

• TCP port/IP or ID-based routing
• Auto Device Routing for simplified configuration
• Web Console (HTTP/HTTPS), Telnet, MGate Manager, DSU, MCC Tool
• SNMPv1/v2c/v3, HTTPS (TLS 1.2), AES-128/256, SHA-256

Serial Interface:

• MB3170: 1 port (DB9, RS-232/422/485)
• MB3270: 2 ports (2 x DB9)
• Baudrate: 50 bps to 921.6 kbps
• Data Bits: 7, 8
• Parity: None, Even, Odd, Space, Mark
• Stop Bits: 1, 2
• Flow Control: DTR/DSR, RTS/CTS, RTS Toggle (RS-232 only)
• RS-485: ADDC, 1 kΩ/150 kΩ Pull High/Low, 120 Ω terminator
• Isolation: 2 kV (for “-I” models)

Performance Features:

• Up to 32 Modbus TCP clients and 32 servers
• Concurrent Ethernet and serial master access
• Emergency request tunnel for QoS
• DIN rail mounting

Power:

• Input Voltage: 12–48 VDC
• Current Consumption:
• Standard models: 435 mA @ 12 VDC
• I models: 510–555 mA @ 12 VDC
• Connector: 7-pin terminal block
• Relay Output: 1 A @ 30 VDC (resistive load)

Mechanical:

• Housing: Plastic
• IP Rating: IP30
• Dimensions (with ears): 29 x 89.2 x 124.5 mm
• Weight:
• MB3170: 360 g
• MB3270: 380 g

Environmental:

• Operating Temperature:
• Standard: 0 to 60 °C
• Wide-temp: -40 to 75 °C
• Storage Temperature: -40 to 85 °C
• Humidity: 5 to 95% RH (non-condensing)

Certifications:

• EMC: EN 55032/35, FCC Part 15B Class A
• Environmental: ATEX, IECEx, DNV
• Safety: UL 60950-1, UL 508, EN 62368-1
• Mechanical: IEC 60068-2-27/6/32/64

MTBF (Telcordia SR332):

• MB3170: 1,662,526 hrs
• MB3270: 1,477,768 hrs
• MB3170I: 1,484,777 hrs
• MB3270I: 1,144,837 hrs

Warranty:

• 5-year manufacturer warranty

Package Contents:

• 1x MGate MB3170 or MB3270 gateway
• 1x Quick installation guide
• 1x Warranty card