For several years, CHANGXIN have specialized in trading high-quality components in the field of industrial automation.
Focusing on PLC components, DCS and CNC technology, and drivetechnology
MOXA MGate MB3480 4-port standard Modbus protocol gateway
| Brand: MOXA |
| Item NO: MGate MB3480 |
| Effect: 4-port standard Modbus protocol gateway |
| Condition: In stock, brand new/Used |
| Warranty: 365 days |
| Payment:T/T 50% deposit, 50% balance |
| www.szcxdcs.com |
+86 15359298293
MOXA MGate MB3480 4-port standard Modbus protocol gateway
MB3480 is a 4-port standard Modbus protocol gateway in the Taiwan Moxa MGate MB3000 series, used to achieve bidirectional conversion between Modbus TCP Ethernet protocol and Modbus RTU/ASCII serial protocol. MB3480 connects 4 RS-232/422/485 serial devices to the Ethernet Modbus TCP network, enabling the upper SCADA/PLC system to remotely access on-site serial instruments through Ethernet PLC、 Substation equipment such as frequency converters; It also supports serial master access to Ethernet side Modbus TCP slave. MB3480 can connect up to 16 TCP master stations and 124 serial slave stations, and is the core communication conversion device for industrial fieldbus networking and device networking.

Product features
- Four independent serial ports, each with optional RS-232/422/485 software, can connect up to 124 Modbus serial slave devices on a single machine.
- Bi directional protocol conversion: Supports Modbus TCP master access to RTU slave and RTU master access to TCP slave, with flexible deployment.
- Up to 16 TCP master stations can access simultaneously, with a maximum of 32 concurrent requests per master station, meeting the concurrent acquisition requirements of multiple SCADA systems.
- Supports three routing methods: IP address, TCP port number, and slave ID. Auto Device Routing automatically generates a routing table with one click, greatly reducing configuration workload.
- ADDC automatic RS-485 data direction control, no external flow control signal required, stable and reliable 485 communication.
- Built in 120 Ω terminal resistor and up/down resistor, suitable for different 485 bus topologies.
- Industrial grade wide temperature design (0~55 ℃), metal shell IP30, resistant to EMC/ESD/surge interference, suitable for harsh industrial sites.
- Rich network management functions: SNPv3, HTTPS, SMTP alarm email, NTP synchronization, easy integration into enterprise operation and maintenance systems.
- 12~48VDC wide voltage power supply, dual power supply interface of terminal block and power socket, reliable wiring.
- 5-year original factory warranty, MTBF exceeding 1.2 million hours, high reliability for long-term operation.
- Supports multiple configuration methods for web browsers, Telnet, and Windows Manager software, making deployment and maintenance easy.
Main product range
- Control system (DCS/PLC/CNC): panel controller, HMI and human-machine interface, industrial PC, CPU processor module, communication module, analog/digital I/O module
- Drive and motion control: frequency converter, servo drive, servo motor, power module
- Robot spare parts: key spare parts such as robot control board, axis computer, servo unit, I/O module, etc
- State monitoring and safety system: vibration monitoring system, safety instrumented system (SIS), redundant controller
Application Industry
The products are widely used in various industrial fields such as metallurgy, oil and gas, petrochemicals, electricity, power transmission and distribution, water conservancy, water treatment and environmental protection, coal mining, aluminum industry, glass manufacturing, paper and printing, textile printing and dyeing, machinery manufacturing, electronics manufacturing, automobile manufacturing, plastic machinery, boiler heating, energy, etc.
MOXA MGate MB3480 4-port standard Modbus protocol gateway


Main brand
| No. | Brand | Country/Region | Main Product Lines | Typical Series/Models |
| 1 | ABB | Switzerland | PLC/DCS Controllers, I/O Modules, Robot Spare Parts, Drive Systems | AC800PEC,AC800M, AC800F, AC31, 800xA, Bailey INFI 90, DSQC Robot Modules, Advant OCS, H&B Freelance |
| 2 | Bently Nevada | USA | Condition Monitoring Systems, Vibration Sensors, Proximitors | 3500 Monitoring System, 3300 Monitoring System, Eddy Current Probes, Proximitors |
| 3 | TRICONEX | USA | Safety Instrumented Systems (SIS), TMR Redundant Controllers | Tricon System Modules, Communication Modules, I/O Modules |
| 4 | Woodward | USA | Steam/Gas Turbine Control, Speed Governing Systems, Actuators | 505 Governor, ProTech, MicroNet, NetCon Series |
| 5 | FOXBORO | USA | DCS Systems, I/A Series Control Modules | I/A Series, FBM Modules, Controllers |
| 6 | WESTINGHOUSE | USA | DCS Systems, Ovation Controllers, Modules | Ovation System, WDPF Series |
| 7 | Motorola | USA | Industrial Communication Modules, Embedded Control Modules | MVME Series, VME Bus Modules |
| 8 | GE | USA | PLC, Excitation System Modules, CPU/Communication/Analog Modules | IS200/DS200 Excitation Cards, IC693/IC695/IC697/IC698/IC200/IC660/IC670 Series |
| 9 | YOKOGAWA | Japan | DCS Systems, CPU Modules, I/O Cards | CENTUM CS3000, CS1000, VP Series |
| 10 | HIMA | Germany | Safety Control Systems, SIL Safety Modules | H41q/H51q, HIMax, HIMatrix Series |
| 11 | EMERSON | USA | DCS Systems, Redundant Controllers, Safety Systems | Ovation, DeltaV Dual-Channel Redundant Safety Systems |
| 12 | Honeywell | USA | DCS Systems, Process Control Modules | Experion PKS/LS/HS, Plant Scape, TDC2000, TDC3000, TPS, Alcont |
| 13 | ICS TRIPLEX | UK | Trusted Safety Control Systems, TMR Modules | Trusted System, T8000 Series |
| 14 | Kollmorgen | USA | Servo Drives, Servo Motors, Motion Control | S700, S300, AKD Series Drives, Servo Motors |
| 15 | PROSOFT | USA | Industrial Communication Modules, Protocol Gateways | MVI69, MVI56, MVI94, MVI71, MVI46, PS69, 3150 Series |
| 16 | Alstom | France | Power Control, Protection Relays, Control Systems | GEC ALSTHOM, Protection and Control Modules |
| 17 | EATON | USA | Electrical Control, PLC, Power Supplies, Circuit Breakers | XC/XN Series PLC, Moeller Series, Power Supply Modules |
| 18 | Allen-Bradley (Rockwell) | USA | PLC Controllers, I/O Modules, Communication Modules | ControlLogix 1756, CompactLogix 1769, SLC 500 1747/1746, PLC-5 1771/1785 |
| 19 | Schneider | France | PLC, Modicon Series, CPU/Communication Modules | Quantum 140, Modicon M340, Modicon Premium |
————————Shenzhen Changxin Automation Equipment Co Ltd -————————
Products that have been released are welcome for consultation. Due to the wide variety of models, we were unable to upload physical images one by one!
![]()

Parameter Specifications
| Parameter | Specification |
|---|---|
| Model | MGate MB3480 |
| Manufacturer | Moxa |
| Product Type | 4-port Modbus TCP Gateway |
| Serial Ports | 4 × RS-232/422/485 (software-selectable) |
| Serial Connector | DB9 male |
| Ethernet Ports | 1 × 10/100BaseT(X), RJ45, auto MDI/MDI-X |
| Magnetic Isolation (Ethernet) | 1.5 kV built-in |
| Serial Protocols | Modbus RTU/ASCII Master / Slave |
| Ethernet Protocols | Modbus TCP Client (Master) / Server (Slave) |
| Max TCP Masters | 16 simultaneous |
| Max Serial Slaves | Up to 124 (31 per port × 4 ports) |
| Max TCP Slaves | 32 |
| Baud Rate | 50 bps ~ 921.6 kbps |
| Data Bits | 7, 8 |
| Parity | None / Even / Odd / Space / Mark |
| Stop Bits | 1, 2 |
| Flow Control | RTS/CTS, DTR/DSR, RTS Toggle |
| RS-485 Direction Control | ADDC automatic data direction control |
| RS-485 Terminator | 120 Ω built-in |
| Pull High/Low Resistor | 1 kΩ / 150 kΩ |
| Routing Methods | By IP address, TCP port, or ID mapping |
| Auto Device Routing | Supported |
| Configuration | Web Console (HTTP/HTTPS), DSU, MGate Manager, Telnet |
| Management Protocols | ARP, DHCP, DNS, HTTP, SNMPv1/v2c/v3, TCP/IP, Telnet, UDP, ICMP, SMTP, NTP |
| Security | HTTPS (TLS 1.2), AES-128/256, SHA-256, SNMPv3, local authentication |
| Input Voltage | 12 ~ 48 VDC |
| Input Current | 365 mA @ 12 VDC |
| Power Connector | Power jack + terminal block |
| Housing | Metal |
| Protection Rating | IP30 |
| Mounting | DIN rail / wall / panel mounting |
| Dimensions (W×H×D, with ears) | 35.5 mm × 102.7 mm × 181.3 mm |
| Dimensions (without ears) | 35.5 mm × 102.7 mm × 157.2 mm |
| Net Weight | 740 g |
| Operating Temperature | 0 ℃ ~ +55 ℃ |
| Storage Temperature | -40 ℃ ~ +85 ℃ |
| Ambient Humidity | 5% ~ 95%, non-condensing |
| EMC | EN 55032/35, CISPR 32, FCC Part 15B Class A |
| EMS | IEC 61000-4-2/3/4/5/6/8/11 |
| Signal Surge Protection | 2 kV (MB3480) |
| Safety | IEC/UL 62368-1, IEC 60950-1 |
| MTBF | 1,213,993 hours (Telcordia SR-332) |
| Warranty | 5 years |
| Country of Origin | Taiwan, China |











