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Brand: MOXA
Moxa MGate 5121 CAN to Modbus TCP Gateway
Description
How the MGate 5121 bridges protocols
MGate 5121 is listed by Moxa as: 1-port CAN-to-Modbus TCP gateways, -10 to 60°C operating temperature. A compact gateway that exposes a CANopen, SAE J1939 or proprietary CAN 2.0A/B network to a Modbus TCP master, over a spring-type Euroblock terminal on the CAN side.
Key figures from the Moxa page: the power input is 12 to 48 VDC; operating temperature is -10 to 60°C (14 to 140°F); dimensions are 25 x 90 x 129.6 mm (0.98 x 3.54 x 5.1 in); weight is 294 g (0.65 lb); the enclosure is rated IP30.
Standards and approvals printed for this model include safety standard EN 61010-2-201; UL 61010-2-201. Approvals can differ between variants of a series, so check the one on the exact order code.
Technical specifications
| Parameter | Specification |
|---|---|
| 10/100BaseT(X) Ports (RJ45 connector) | 2; Auto MDI/MDI-X connection |
| Magnetic Isolation Protection | 1.5 kV (built-in) |
| Ethernet Software Features: Industrial Protocols | Modbus TCP Client |
| Time Management | NTP Client |
| Authentication | Local database |
| No. of Ports | 1 |
| Connector | Spring-type Euroblock terminal |
| CANopen: Mode | Master |
| Max No. of Nodes | 64 |
| Max No. of Receive PDOs | 256 |
| Max No. of Transmit PDOs | 256 |
| SDOs | Supported |
| CANopen: Input Data Size | 2048 bytes |
| CANopen: Output Data Size | 2048 bytes |
| Max. No. of Commands | 256 |
| J1939: Total Input Data Size | 2048 bytes |
| J1939: Total Output Data Size | 2048 bytes |
| Frame Format | CAN 2.0A; CAN 2.0B |
| Max. No. of Transactions | 256 |
| Proprietary CAN: Input Data Size | 2048 bytes |
| Proprietary CAN: Output Data Size | 2048 bytes |
| Modbus TCP: Mode | Server |
| Functions Supported | 1, 2, 3, 4, 5, 6, 15, 16, 23 |
| Max. No. of Client Connections | 16 |
| Modbus TCP: Total Input Data Size | 2048 bytes |
| Modbus TCP: Total Output Data Size | 2048 bytes |
| Input Voltage | 12 to 48 VDC |
| Input Current | 455 mA (max) |
| Power Connector | Spring-type Euroblock terminal |
| Contact Current Rating | Resistive load: 2 A @ 30 VDC |
| Housing | Metal |
| IP Rating | IP30 |
| Weight | 294 g (0.65 lb) |
| Operating Temperature | -10 to 60°C (14 to 140°F) |
| Storage Temperature (package included) | -40 to 85°C (-40 to 185°F) |
| Ambient Relative Humidity | 5 to 95% (non-condensing) |
| Safety | EN 61010-2-201; UL 61010-2-201 |
| EMC | EN 61000-6-2/-6-4 |
| EMI | FCC Part 15B Class A |
| EMS | IEC 61000-4-2 ESD: Contact: 8 kV; Air: 15 kV; IEC 61000-4-3 RS: 80 MHz to 1 GHz: 10 V/m; IEC 61000-4-4 EFT: Power: 4 kV; Signal: 2 kV; IEC 61000-4-5 Surge: Power: 2 … |
| Freefall | IEC 60068-2-31 |
| Shock | IEC 60068-2-27 |
| Vibration | IEC 60068-2-6; IEC 60068-2-64 |
| Warranty Period | 5 years |
Where it fits and what to check
It is aimed at engine, generator and machinery networks where J1939 data (engine speed, temperatures, alarms) must reach a SCADA system on Ethernet. CAN baud rates run from 10 kbps to 1 Mbps for CANopen and 250 or 500 kbps for J1939.
On the practical side, the housing is metal; the stated MTBF is 1,408,984 hrs hrs; the warranty period is 5 years. Treat the MTBF as a manufacturer prediction under its stated method, not a guarantee for your site.
Please check which CAN protocol your equipment uses, the baud rate and the number of data points, and the SCADA protocol on the Ethernet side before you place an order. Seven Star LLC supplies as an independent company and prices against the precise code requested.
Related MOXA products: Moxa MGate 5101-PBM-MN PROFIBUS to Modbus TCP Gateway, Moxa MGate 5109 Modbus to DNP3 Gateway, Moxa MGate 5122 CAN to EtherNet/IP Gateway, Moxa MGate 5118 J1939 to Modbus/PROFINET Gateway, Moxa MGate 5217I-600-T Modbus to BACnet/IP Gateway and Moxa MGate MB3270 2-Port Advanced Modbus TCP Gateway.
Documents and quotation
More products in this range: Industrial Communications. Download the official Moxa datasheet (moxa-mgate-5121-series-datasheet-v2.2) from this page and send us your order code, quantity and destination for a quotation.
Datasheets & Documents
- Datasheet Moxa MGate 5121 series datasheet v2.2 Download
Reviews (0)
About brand
Moxa is the Taiwanese maker of industrial networking equipment: Ethernet switches, serial device servers, protocol gateways, media converters, secure routers and remote I/O. It was founded in Taiwan in 1987 and started with serial communication products before moving into industrial Ethernet. It is headquartered in Taipei.
Seven Star LLC is an independent supplier in Muscat. We list Moxa switches, serial servers, gateways and converters, and supply them to control system integrators, utilities, oil and gas and building automation projects in Oman and the GCC by exact model.
Moxa at a glance
| Established | 1987, Taiwan |
|---|---|
| Headquarters | Taipei, Taiwan |
| First products | Serial communication boards and serial connectivity |
| Product families | Unmanaged, managed and rackmount industrial Ethernet switches, serial device servers, Modbus and fieldbus gateways, media converters, serial converters, secure routers, remote I/O and industrial computers |
Moxa products we list
| Family | Models | Typical use |
|---|---|---|
| Unmanaged switches | EDS-205A, EDS-208A, EDS-2008-EL, EDS-2010-ML, EDS-308, EDS-316, EDS-G2005-EL, EDS-G205, EDS-G308, EDS-P206A PoE | Simple plug-and-play networks inside control panels |
| Managed switches | EDS-405A, EDS-408A, EDS-508A, EDS-510A, EDS-510E, EDS-518A, EDS-528E, EDS-G508E, EDS-G509, EDS-G512E, ICS-G7528A rackmount | Redundant ring networks, VLANs and diagnostics for SCADA and DCS |
| Serial device servers | NPort 5110A, 5150A, 5210A, 5250A, 5410, 5450, 5610-8, 5650-8, 6150, IA5150A | Putting RS-232/422/485 devices on an Ethernet network |
| Protocol gateways | MGate MB3180, MB3170, MB3280, MB3270, 5101-PBM-MN, 5105-MB-EIP, 5109 DNP3, 5114 IEC 104 | Linking Modbus RTU/TCP, PROFIBUS, EtherNet/IP, DNP3 and IEC 60870-5-104 systems |
| Converters, routers and I/O | IMC-21A, IMC-101, IMC-21GA, TCF-142, TCC-100, TCC-80, TCC-120, EDR-G9010 router, ioLogik E2210 | Fibre links over long distances, serial conversion, network security and remote I/O |
The choice between switch types follows the network. An unmanaged switch simply forwards traffic and suits a small, isolated panel. A managed switch adds redundancy protocols (Moxa's Turbo Ring recovers a broken ring in milliseconds), VLANs to separate traffic, port mirroring and alarms, which a SCADA or DCS network needs. The suffix on a Moxa model also matters: "-T" means a wide operating temperature range (typically -40 to 75 °C), which is the safe choice for outdoor cabinets in the Gulf summer. "-MM-SC" or "-S-SC" means multi-mode or single-mode fibre with SC connectors.
Where Moxa products are used
In Oman and the GCC, Moxa equipment connects RTUs, PLCs, meters and protection relays in oil and gas fields, electrical substations, water and wastewater SCADA, transport, and building and energy management systems.
Ordering Moxa products: what we need
Send the complete model including all suffixes (for example EDS-508A-MM-SC-T), the quantity, and for fibre models the fibre type and distance. For gateways, tell us which two protocols need to be linked.
Facts checked against Moxa company information, October 2026.
Browse MOXA products by category: Industrial Communications.
FAQ
Questions about the Moxa MGate 5121 CAN to Modbus TCP Gateway
Answers from our engineering team on installation, compatibility and integration.
01What is the Moxa MGate 5121?
Moxa lists it as: 1-port CAN-to-Modbus TCP gateways, -10 to 60°C operating temperature. A compact gateway that exposes a CANopen, SAE J1939 or proprietary CAN 2.0A/B network to a Modbus TCP master, over a spring-type Euroblock terminal on the CAN side.
02What power supply does the MGate 5121 need?
The Moxa specification gives an input voltage of 12 to 48 VDC. Check the terminal arrangement and, where relevant, the redundant-input wiring against your panel supply before ordering.
03What operating temperature range applies to the MGate 5121?
The listed operating temperature is -10 to 60°C (14 to 140°F). Wide-temperature versions carry a -T suffix in Moxa's order codes where the series offers them, and they are separate order codes.
04Which protocols does the MGate 5121 convert?
Per Moxa's description, it is a 1-port CAN-to-Modbus TCP gateways. Industrial protocols listed on the Ethernet side: Modbus TCP Client.
05Where is the MGate 5121 datasheet and how do I ask for a quotation?
The official Moxa datasheet is attached to this page. Send Seven Star LLC the exact order code, quantity and delivery location for a quotation; we are an independent supplier in Muscat.
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