MGate MB3170-G2/MB3270-G2/MB3470-G2 Series
1, 2, and 4-port advanced serial-to-Ethernet Modbus gateways compliant with IEC62443-4-2

Features and Benefits
- Supports high-performing and low-latency agent mode to actively poll Modbus devices and cache data
- Supports proprietary Modbus and Modbus extensions for various devices
- Supports Auto Device Routing for easy configuration
- Supports route by TCP port or IP address for different system architectures
- Connects up to 32 Modbus TCP clients (MGate can queue 32 Modbus requests for each Modbus client connected)
- Supports Modbus serial client to Modbus serial server communications
- Ethernet cascading or dual subnet for flexible network system design
- 10/100BaseTX (RJ45) or 100BaseFX (single mode or multi-mode with SC/ST connector or SFP option)
- Modbus communication test tools independant of external software
- Intuitive Modbus diagnostics and traffic monitoring for easy troubleshooting
- Serial port with 2 kV isolation protection (for -I models)
- Supports redundant dual DC power inputs and 1 relay output
- Compliance with IEC 62443-4-2 Security Level 2 requirements
- -40 to 75°C wide operating temperature range (-T models)
Certifications
- DNV
- CE
- FCC
- Iecex
Introduction
The MGate MB3170-G2, MB3270-G2, and MB3470-G2 are new-generation Modbus gateways that convert between Modbus TCP, RTU, ASCII, and even proprietary or extended Modbus serial protocols. These MGate gateways transparently convert protocols, actively poll connected devices, and cache data in memory. These capabilities make it possible for SCADA systems to retrieve Modbus data directly from the gateway instead of waiting for all Modbus devices to respond, greatly increasing communication performance. Moxa has developed the MGate Series using the IEC 62443-4-1 secure development life-cycle process ensuring secure connections and management of these gateways within industrial networks. In addition, the user experience is enhanced by versatile installation options that accommodate diverse mounting and wiring requirements, a rugged design suitable for harsh environments, and easy-to-use configuration and troubleshooting tools for quick maintenance.
Models in this series (28)




























| — | MGate MB3170-G2 | MGate MB3170-G2-T | MGate MB3170-M-SC-G2 | MGate MB3170-M-SC-G2-T |
| Ethernet | 2 x RJ45 | 2xRJ45 | 1 x RJ45 1 x Multi-mode SC Fiber | 1 x RJ45 1 x Multi-mode SC Fiber |
| No. of Serial Ports | 1 | 1 | 1 | 1 |
| Serial Connector | DB9 | DB9 | DB9 | DB9 |
| Serial Isolation | – | – | – | – |
| Operating Temperature | -10 to 60°C | -40 to 75°C | -10 to 60°C | -40 to 75°C |
| — | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag |
| — | MGate MB3170-M-ST-G2 | MGate MB3170-M-ST-G2-T | MGate MB3170-S-SC-G2 | MGate MB3170-S-SC-G2-T |
| Ethernet | 1 x RJ45 1 x Multi-mode ST Fiber | 1 x RJ45 1 x Multi-mode ST Fiber | 1 x RJ45 1 x Single-mode SC Fiber | 1 x RJ45 1 x Single-mode SC Fiber |
| No. of Serial Ports | 1 | 1 | 1 | 1 |
| Serial Connector | DB9 | DB9 | DB9 | DB9 |
| Serial Isolation | – | – | – | – |
| Operating Temperature | -10 to 60°C | -40 to 75°C | -10 to 60°C | -40 to 75°C |
| — | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag |
| — | MGate MB3170-SFP-G2 | MGate MB3170-SFP-G2-T | MGate MB3170I-G2 | MGate MB3170I-G2-T |
| Ethernet | 1 x RJ45 1 x SFP Slot | 1 x RJ45 1 x SFP Slot | 2 x RJ45 | 2 x RJ45 |
| No. of Serial Ports | 1 | 1 | 1 | 1 |
| Serial Connector | DB9 | DB9 | DB9 | DB9 |
| Serial Isolation | – | – | 2 kV | 2 kV |
| Operating Temperature | -10 to 60°C | -40 to 75°C | -10 to 60°C | -40 to 75°C |
| — | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag |
| — | MGate MB3270-G2 | MGate MB3270-G2-T | MGate MB3270-TB-G2 | MGate MB3270-TB-G2-T |
| Ethernet | 2 x RJ45 | 2 x RJ45 | 2 x RJ45 | 2 x RJ45 |
| No. of Serial Ports | 2 | 2 | 2 | 2 |
| Serial Connector | DB9 | DB9 | 5-pin Terminal Block | 5-pin Terminal Block |
| Serial Isolation | – | – | – | – |
| Operating Temperature | -10 to 60°C | -40 to 75°C | -10 to 60°C | -40 to 75°C |
| — | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag |
| — | MGate MB3270I-G2 | MGate MB3270I-G2-T | MGate MB3270I-TB-G2 | MGate MB3270I-TB-G2-T |
| Ethernet | 2 x RJ45 | 2 x RJ45 | 2 x RJ45 | 2 x RJ45 |
| No. of Serial Ports | 2 | 2 | 2 | 2 |
| Serial Connector | DB9 | DB9 | 5-pin Terminal Block | 5-pin Terminal Block |
| Serial Isolation | 2 kV | 2 kV | 2 kV | 2 kV |
| Operating Temperature | -10 to 60°C | -40 to 75°C | -10 to 60°C | -40 to 75°C |
| — | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag |
| — | MGate MB3470-G2 | MGate MB3470-G2-T | MGate MB3470-TB-G2 | MGate MB3470-TB-G2-T |
| Ethernet | 2 x RJ45 | 2 x RJ45 | 2 x RJ45 | 2 x RJ45 |
| No. of Serial Ports | 4 | 4 | 4 | 4 |
| Serial Connector | DB9 | DB9 | 5-pin Terminal Block | 5-pin Terminal Block |
| Serial Isolation | – | – | – | – |
| Operating Temperature | -10 to 60°C | -40 to 75°C | -10 to 60°C | -40 to 75°C |
| — | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag |
| — | MGate MB3470I-G2 | MGate MB3470I-G2-T | MGate MB3470I-TB-G2 | MGate MB3470I-TB-G2-T |
| Ethernet | 2 x RJ45 | 2 x RJ45 | 2 x RJ45 | 2 x RJ45 |
| No. of Serial Ports | 4 | 4 | 4 | 4 |
| Serial Connector | DB9 | DB9 | 5-pin Terminal Block | 5-pin Terminal Block |
| Serial Isolation | 2 kV | 2 kV | 2 kV | 2 kV |
| Operating Temperature | -10 to 60°C | -40 to 75°C | -10 to 60°C | -40 to 75°C |
| — | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag | Add to Quote View Bag |
Specifications
Shown for MGate MB3170-G2. Per-model differences are listed in the selection grid above.
Ethernet Interface
- 10/100BaseT(X) Ports (RJ45 connector)
- 2 (Ethernet cascade or dual subnet configured by software) Auto MDI/MDI-X connection
- Magnetic Isolation Protection
- 1.5 kV (built-in)
- Optical Fiber
- Read more 100BaseFX Multi-Mode Single-Mode Fiber Cable Type OM1 50/125 µm G.652 800 MHz x km Typical Distance 4 km 5 km 40 km Wavelength Typical (nm) 1300 1310 TX Range (nm) 1260 to 1360 1280 to 1340 RX Range (nm) 1100 to 1600 1100 to 1600 Optical Power TX Range (dBm) -10 to -20 0 to -5 RX Range (dBm) -3 to -32 -3 to -34 Link Budget (dB) 12 29 Dispersion Penalty (dB) 3 1 Note: When connecting a single-mode fiber transceiver, we recommend using an attenuator to prevent damage caused by excessive optical power. Note: Compute the “typical distance” of a specific fiber transceiver as follows: Link budget (dB) > dispersion penalty (dB) + total link loss (dB).
Ethernet Software Features
- Industrial Protocols
- Modbus TCP Client Modbus TCP Server
- Configuration Options
- Web Console (HTTP/HTTPS) Device Search Utility (DSU) MCC Tool Windows Driver Manager Utility MXview One Software MXconfig Software
- Management
- ARP DHCP Client DNS HTTPS ICMP IPv4/IPv6 SMTP SMTPS SNMPv1/v2c/v3 SNTP TCP/IP UDP
- MIB
- MIB-II RFC1213, RFC1317
- Time Management
- SNTP Client
- System Log Count
- Local: 10,000 max.
Security Functions
- Authentication
- Local database
- Encryption
- AES-128 AES-256 ECC-256 ECC-384 ECC-521 HMAC RSA-1024 RSA-2048 RSA-3072 RSA-4096 SHA-256 SHA-384
- Security Protocols
- SNMPv3 HTTPS (TLS 1.2)
Serial Interface
- No. of Ports
- MGate MB3170-G2 models: 1 MGate MB3270-G2 models: 2 MGate MB3470-G2 models: 4
- Connector
- MGate MB3170-G2/MB3270-G2/MB3470-G2 models: 1/2/4 x DB9 male MGate MB3270-TB-G2/MB3470-TB-G2 models: 2/4 x 5-pin spring type terminal block
- Serial Standards
- RS-232/422/485 (software-selectable)
- Bitrate
- 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 Toggle (RS-232 only) RTS/CTS
- Pull High/Low Resistor for RS-485
- 1 kilo-ohm, 150 kilo-ohms (software selectable)
- Terminator for RS-485
- 120 ohms (software selectable)
- Isolation
- I models: 2 kV
- RS-485 Data Direction Control
- ADDC (automatic data direction control)
Serial Signals
- RS-232
- TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND or TxD, RxD, GND (for -TB models)
- RS-422
- Tx+, Tx-, Rx+, Rx-, GND
- RS-485-2w
- Data+, Data-, GND
- RS-485-4w
- Tx+, Tx-, Rx+, Rx-, GND
Serial Software Features
- Industrial Protocols
- Modbus RTU/ASCII Client Modbus RTU/ASCII Server (supported in Agent mode) Proprietary Modbus Serial Client
Modbus (Transparent)
- Max. No. of Client Connections
- 32
- Max. No. of Server Connections
- 32
Modbus RTU/ASCII (Agent)
- Mode
- Client (Master) Server (Slave) Proprietary Serial (client)
- Functions Supported
- 1, 2, 3, 4, 5, 6, 15, 16, 23
- Max. No. of Commands
- 128/serial port
- No. of Tags
- MGate MB3170–G2 models: 150 MGate MB3270–G2 models: 300 MGate MB3470–G2 models: 600
- Total Tag Size
- MGate MB3170–G2 models: 2048 Bytes MGate MB3270–G2 models: 3072 Bytes MGate MB3470–G2 models: 4096 Bytes
Modbus TCP (Agent)
- Mode
- Client (Master) Server (Slave)
- Max. No. of Client Connections
- 32
- Max. No. of Server Connections
- 32
- Functions Supported
- 1, 2, 3, 4, 5, 6, 15, 16, 23
- Max. No. of Commands
- 128
- No. of Tags
- MGate MB3170–G2 models: 150 MGate MB3270–G2 models: 300 MGate MB3470–G2 models: 600
- Total Tag Size
- MGate MB3170–G2 models: 2048 Bytes MGate MB3270–G2 models: 3072 Bytes MGate MB3470–G2 models: 4096 Bytes
Power Parameters
- Input Voltage
- 12 to 48 VDC
- Input Current
- MGate MB3170-G2/MB3270-G2 models: 452 mA @ 12 VDC MGate MB3470-G2 models: 583 mA @ 12 VDC
- Power Connector
- 8-pin terminal block
Relays
- Contact Current Rating
- Resistive load: 1 A @ 30 VDC
Physical Characteristics
- Housing
- Metal
- IP Rating
- IP30
- Dimensions (with ears)
- MGate MB170-G2/MB3270-G2 models: 25 x 89 x 132 mm (0.98 x 3.50 x 5.19 in) MGate MB3470-G2 models: 42 x 89 x 132 mm (1.65 x 3.50 x 5.19 in)
- Dimensions (without DIN-rail mouting kit)
- MGate MB170-G2/MB3270-G2 models: 25 x 89 x 129 mm (0.98 x 3.50 x 5.08 in) MGate MB3470-G2 models: 42 x 89 x 129 mm (1.65 x 3.50 x 5.08 in)
- Weight
- MGate MB3170-G2 models: 338 g (0.75 lb) MGate MB3270-G2 models: 393 g (0.87 lb) MGate MB3470-G2 models: 444 g (0.98 lb)
Environmental Limits
- Operating Temperature
- Standard models : -10 to 60°C (14 to 140°F) Wide temp. models: -40 to 75°C (-40 to 167°F)
- Storage Temperature (package included)
- -40 to 85°C (-40 to 185°F)
- Ambient Relative Humidity
- 5 to 95% (non-condensing)
Standards and Certifications
- EMC
- EN 61000-6-2/-6-4
- EMI
- CISPR 32, FCC Part 15B Class A
- EMS
- IEC 61000-4-2 ESD: Contact: 6 kV; Air: 8 kV IEC 61000-4-3 RS: 80 MHz to 2 GHz: 10 V/m IEC 61000-4-4 EFT: Power: 4 kV; Signal: 2 kV IEC 61000-4-5 Surge: Power: 2 kV, Signal: 1 kV IEC 61000-4-6 CS: 150 kHz to 80 MHz: 10 V/m; Signal: 10 V/m IEC 61000-4-8 PFMF IEC 61000-4-11
- Hazardous Locations
- ATEX Class I Division 2 IECEx
- Maritime
- DNV Certified with 24 VDC power input
- Safety
- EN 62368-1 UL 62368-1
- Vibration
- IEC 60068-2-6
- Package Drop Test
- ISTA 1A
MTBF
- Time
- MGate MB3170-G2 models: 3,238,923 hrs MGate MB3170I-G2 models: 3,156,544 hrs MGate MB3170-S/M-SC-G2/M-ST-G2 models: 2,889,487 hrs MGate MB3170-SFP-G2 models: 3,109,327 hrs MGate MB3270-TB-G2 models: 2,943,248 hrs MGate MB3270-G2 models: 2,931,934 hrs MGate MB3270I-TB-G2 models: 2,809,979 hrs MGate MB3270I-G2 models: 2,799,662 hrs MGate MB3470-TB-G2 models: 2,377,791 hrs MGate MB3470-G2 models: 2,363,042 hrs MGate MB3470I-TB-G2 models: 2,208,607 hrs MGate MB3470I-G2 models: 2,195,874 hrs
- Standards
- Telcordia Standard SR-332
Warranty
- Warranty Period
- 5 years
- Details
- See www.moxa.com/warranty
Resources
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