MGate MB3170-G2/MB3270-G2/MB3470-G2 Series

1, 2, and 4-port advanced serial-to-Ethernet Modbus gateways compliant with IEC62443-4-2

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moxa-mgate-mb3170-g2-mb3270-g2-mb3470-g2-series-image-2-(1).jpg | Moxa

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moxa-mgate-mb3170-g2-mb3270-g2-mb3470-g2-series-image-6-(1).jpg | Moxa

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

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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.

Hight-performance Modbus Conversion

MGate MB3170-G2/MB3270-G2/MB3470-G2 gateways operate in either transparent (direct protocol conversion) or agent (polling and caching) mode. Transparent mode converts protocols on a per-request basis. But for larger Modbus systems or when lower latency is needed, agent mode greatly enhances SCADA communication by directly accessing the gateway’s cache.

Flexible Modbus Conversion for Various Systems

Supporting dual subnet network configuration, the MGate seamlessly integrates Modbus TCP with Modbus RTU/ASCII without disrupting existing systems. With multiple serial port models, the MGate simultaneously converts between Modbus serial and Modbus TCP, as well as serial-to-serial and TCP-to-TCP. Even with legacy serial, or COM port-based software, the MGate’s Real COM mode enables communication through Ethernet TCP with no software adjustments. Beyond standard Modbus RTU and ASCII, the MGate also converts proprietary and extended Modbus serial protocols, eliminating the need for custom development or additional equipment and ensuring near-universal Modbus system compatibility. The MGate-G2 is capable of simultaneous conversion from proprietary serial and Modbus serial to Modbus TCP.

Intuitive Configuration and Minimal Maintenance

Downtime during maintenance can be costly. System alerts often require contacting vendors, prolonging troubleshooting due to information gathering and consultations. MGate-G2 gateways streamline this process by providing comprehensive troubleshooting information for rapid issue identification. One-click diagnostics gather all necessary data for technical support, empowering users to efficiently resolve issues and drastically reduce downtime.

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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

		100BaseFX
		Multi-Mode		Single-Mode
Fiber Cable Type		OM1	50/125 µm	G.652
Fiber Cable Type		OM1	800 MHz x km	G.652
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).

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

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)

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)
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 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)

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

Industrial Protocols

Modbus RTU/ASCII Client
Modbus RTU/ASCII Server
(supported in Agent mode)
Proprietary Modbus Serial Client

Max. No. of Client Connections

32
Max. No. of Server Connections

32

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

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

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

Contact Current Rating

Resistive load: 1 A @ 30 VDC

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 modelss: 393 g (0.87 lb)
MGate MB3470-G2 Series: 444 g (0.98 lb)

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)

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: 4 kV
IEC 61000-4-5 Surge: Power: 2 kV, Signal: 1 kV
IEC 61000-4-6 CS: 10 V
IEC 61000-4-8 PFMF
IEC 61000-4-11
Hazardous Locations

ATEX
Class I Division 2
IECEx
Note: Certification processes are underway; expected completion by the end of June 2026.
Maritime

DNV
Note: Certification process is underway; expected completion by the end of June 2026
Safety

EN 62368-1
UL 62368-1
Vibration

IEC 60068-2-6
Package Drop Test

ISTA 1A

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 Period

5 years
Details

See www.moxa.com/warranty

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Software, Firmware, and Drivers

Name	Type	Checksum	Version	Operating System	Release Date
Moxa Windows Driver Manager (Windows 11 and Server 2022 and later, WHQL certified) 11.9 MB	Driver	BA32BA788191ADABE0FFE9ABE42A00117EE845DBF2B69561C594D26290BB401B1F8EF8F08B1798E920A1F6A484F32E17ADB4FFF52CB093A080398C4AEE821494 SHA-512	v4.5	Windows 11 Windows Server 2022 Windows Server 2025	Jan 09, 2026 Jan 09, 2026 Release notes
Moxa Windows Driver Manager (Windows 7 to 10 and Windows Server 2008 R2 to 2019, WHQL certified) 12.2 MB	Driver	4844B332A6A26E4D96FE04099891F53CE327E08CAAD5EF7E4CABDD1831C0B38432D8DCB208DCAAB67F182F8EABC134064D92F179B1ABB0B8FEB7B5FAF0F54AD7 SHA-512	v3.8	Windows 10 Windows 7 Windows 8 Windows 8.1 Windows Server 2008 R2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2016 Windows Server 2019	Jan 09, 2026 Jan 09, 2026 Release notes
Device Search Utility (installer) 236.2 MB	Utility	46BFBEF375C5A5A231CDFBFEBCC30E1847BDAB75BDBD882E681528558AB696F43ED8B14BA7BF199EEF60625FDECF4C21A63FD20E0D0D735246EBC27B10C2399D SHA-512	v3.1	Windows 10 Windows 11 Windows 7 Windows 8 Windows 8.1 Windows Server 2008 R2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2025	Nov 17, 2025 Nov 17, 2025 Release notes
Device Search Utility (portable) 128.6 MB	Utility	728BA6AE2F8A19FEE90E5E89B67E72BBEC0CF70A6343D897B839B2A5BB897B19B7ECD9FDBCFEB412207F0536AC82E4B7923F25E86B5C1EC8F6592F1BC494BD3D SHA-512	v3.1	Windows 10 Windows 11 Windows 7 Windows 8 Windows 8.1 Windows Server 2008 R2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2025	Nov 17, 2025 Nov 17, 2025 Release notes
MXconfig Plugin 1.8 MB	Software Package	40A34C70712DB87771E64ABC2C5ECF5767E4270E01A7D9820502CDF06823EFBEB194F48BE5DE24F1CA7DBE1339F21431C027317B3A3353DE1999E43B6C1BF3D2 SHA-512	v1.8	Windows 10 Windows 7 Windows Server 2008 R2 Windows Server 2012 Windows Server 2012 R2	Oct 02, 2025 Oct 02, 2025 Release notes
MXview One plugin (Linux) 21.7 MB	Software Package	9A6C5240A83B60A2C6FC6715645A6501BEDF612402573FF17ABA15479882B4AF2C7F781FB59819E06AA185ED690EAC73FE6A6CC2A03D5CB44FE50756BF75D075 SHA-512	v1.8	Ubuntu 18.04 Ubuntu 20.04 Ubuntu 22.04	Oct 01, 2025 Oct 01, 2025 Release notes
MXview One plugin (Windows) 22.6 MB	Software Package	2A35C603BDC83AD15BC1E3D82E899EA8B7D87E441C8C47A00115DE15B85F2EB1CC364973F43DFA82728A83568A6483DB757E2AF6F30541C82B9F4375A6BF6F7E SHA-512	v1.8	Windows 10 Windows 11 Windows Server 2016 Windows Server 2019 Windows Server 2022	Oct 01, 2025 Oct 01, 2025 Release notes
Firmware for MGate MB3170-G2/MB3270-G2/MB3470-G2 Series 4.0 MB	Firmware	BA0A7243EE9D0A837D4464BD25A29529E9C48A9B241791E5AD4461F4E7D9EBDA97B1D781F7462DED88ED13A67BB25C1B0757A1BC6E4A47938A53EF007BE22887 SHA-512	v1.0		Sep 30, 2025 Sep 30, 2025 Release notes
Moxa CLI Configuration Tool (Linux) 11.6 MB	Utility	4003D7F9F6F7DC5F64893018AAE59AF552AAEDEEB0C917A7FD0279C5536AA0566F621F1625C3F96EE718284F78CAEA76C4D56E67C999797B88E6DBE5AA80B5B5 SHA-512	v1.5	Linux Kernel 2.6.x Linux Kernel 3.x Linux Kernel 4.x Linux Kernel 5.x Linux Kernel 6.x	Aug 05, 2025 Aug 05, 2025 Release notes
Moxa CLI Configuration Tool (Windows) 2.0 MB	Utility	EA861EBB97AAE1349475A0A620F19C7D56CD83866CC24F22D971830522BC92F59DC6BF71BD65933A5A6BDBECEC55F67F436DEE5827202085BC54904DB156D3A8 SHA-512	v1.5	Windows 10 Windows 11 Windows 7 Windows 8 Windows 8.1 Windows Server 2008 R2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2016 Windows Server 2019	Jul 30, 2025 Jul 30, 2025 Release notes

Support Documents

Name	Type	Version	Release Date
Tech Note: The Migration Guide for the MGate MB3170 G2/MB3270-G2 Series 968.8 KB	Tech Note	v1.0	Dec 12, 2025 Dec 12, 2025
Datasheet for MGate MB3170-G2/MB3270-G2/MB3470-G2 Series 1.1 MB	Datasheet	v1.1	Dec 03, 2025 Dec 03, 2025
Device Search Utility v3.x User Manual 2.8 MB	Manual	v1.1	Nov 17, 2025 Nov 17, 2025
Manual for MGate MB3170-G2/MB3270-G2/MB3470-G2 Series 17.3 MB	Manual	v1.1	Nov 11, 2025 Nov 11, 2025
QIG for MGate MB3170-G2/MB3270-G2/MB3470-G2 Series 3.5 MB	QIG	v1.0	Sep 30, 2025 Sep 30, 2025
FOSS statement for MGate MB3170-G2/MB3270-G2/MB3470-G2 Series 374.8 KB	Declaration	v1.0	Sep 30, 2025 Sep 30, 2025
Tech Note for MGate MB317Tech Note: The Security Hardening Guide for the MGate MB3x70-G2 Series 1.0 MB	Tech Note	v1.0	Sep 30, 2025 Sep 30, 2025
Declaration of Conformity (EU/UK) for MGate MB3000-G2/NPort IA5000-G2 Series 353.3 KB	Declaration	v1.0	Sep 15, 2025 Sep 15, 2025
FOSS Statement for Moxa CLI Configuration Tool 114.6 KB	Declaration	v1.0	Dec 10, 2024 Dec 10, 2024
FOSS Statement for Device Search Utility 161.8 KB	Declaration	v1.0	Jun 24, 2024 Jun 24, 2024

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Available Models (28)

Show Images

	Compare MGate MB3270-G2	Compare MGate MB3470I-G2-T	Compare MGate MB3170-G2	Compare MGate MB3270I-G2-T
Ethernet	2 x RJ45	2 x RJ45	2 x RJ45	2 x RJ45
No. of Serial Ports	2	4	1	2
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
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	Compare MGate MB3170-M-ST-G2-T	Compare MGate MB3170-S-SC-G2	Compare MGate MB3470I-TB-G2	Compare MGate MB3470-TB-G2-T
Ethernet	1 x RJ45 1 x Multi-mode ST Fiber	1 x RJ45 1 x Single-mode SC Fiber	2 x RJ45	2 x RJ45
No. of Serial Ports	1	1	4	4
Serial Connector	DB9	DB9	5-pin Terminal Block	5-pin Terminal Block
Serial Isolation	–	–	2 kV	–
Operating Temperature	-40 to 75°C	-10 to 60°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

	Compare MGate MB3170I-G2	Compare MGate MB3270I-TB-G2-T	Compare MGate MB3170-G2-T	Compare MGate MB3470I-G2
Ethernet	2 x RJ45	2 x RJ45	2xRJ45	2 x RJ45
No. of Serial Ports	1	2	1	4
Serial Connector	DB9	5-pin Terminal Block	DB9	DB9
Serial Isolation	2 kV	2 kV	–	2 kV
Operating Temperature	-10 to 60°C	-40 to 75°C	-40 to 75°C	-10 to 60°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare MGate MB3470-G2-T	Compare MGate MB3170-SFP-G2-T	Compare MGate MB3170-M-SC-G2	Compare MGate MB3470-G2
Ethernet	2 x RJ45	1 x RJ45 1 x SFP Slot	1 x RJ45 1 x Multi-mode SC Fiber	2 x RJ45
No. of Serial Ports	4	1	1	4
Serial Connector	DB9	DB9	DB9	DB9
Serial Isolation	–	–	–	–
Operating Temperature	-40 to 75°C	-40 to 75°C	-10 to 60°C	-10 to 60°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare MGate MB3170-M-ST-G2	Compare MGate MB3170I-G2-T	Compare MGate MB3170-S-SC-G2-T	Compare MGate MB3470-TB-G2
Ethernet	1 x RJ45 1 x Multi-mode ST Fiber	2 x RJ45	1 x RJ45 1 x Single-mode SC Fiber	2 x RJ45
No. of Serial Ports	1	1	1	4
Serial Connector	DB9	DB9	DB9	5-pin Terminal Block
Serial Isolation	–	2 kV	–	–
Operating Temperature	-10 to 60°C	-40 to 75°C	-40 to 75°C	-10 to 60°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare MGate MB3170-SFP-G2	Compare MGate MB3270-TB-G2	Compare MGate MB3470I-TB-G2-T	Compare MGate MB3270I-G2
Ethernet	1 x RJ45 1 x SFP Slot	2 x RJ45	2 x RJ45	2 x RJ45
No. of Serial Ports	1	2	4	2
Serial Connector	DB9	5-pin Terminal Block	5-pin Terminal Block	DB9
Serial Isolation	–	–	2 kV	2 kV
Operating Temperature	-10 to 60°C	-10 to 60°C	-40 to 75°C	-10 to 60°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare MGate MB3270-G2-T	Compare MGate MB3170-M-SC-G2-T	Compare MGate MB3270I-TB-G2	Compare MGate MB3270-TB-G2-T
Ethernet	2 x RJ45	1 x RJ45 1 x Multi-mode SC Fiber	2 x RJ45	2 x RJ45
No. of Serial Ports	2	1	2	2
Serial Connector	DB9	DB9	5-pin Terminal Block	5-pin Terminal Block
Serial Isolation	–	–	2 kV	–
Operating Temperature	-40 to 75°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

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