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Brand: MOXA
Moxa NPort 5430I 4-Port RS-422/485 Isolated Device Server
Description
What the NPort 5430I gives a serial instrument
A four-port serial device server for RS-422 and RS-485 only, with 2 kV isolation on the serial side and terminal-block connectors instead of DB9. Moxa’s own one-line description of the NPort 5430I reads: 4-port RS-422/485 serial device server with 2 kV isolation.
On the datasheet side, the power input is 12 to 48 VDC, 24 VDC for DNV; operating temperature is 0 to 55°C (32 to 131°F); dimensions are 181 x 103 x 33 mm (7.14 x 4.06 x 1.30 in); weight is 740 g (1.63 lb).
Standards and approvals printed for this model include marine approvals (DNV); safety standard UL 62368-1. 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) | 1 |
| Magnetic Isolation Protection | 1.5 kV (built-in) |
| Management | ARP; BOOTP; DHCP Client; DNS; HTTP; HTTPS; ICMP; IPv4; LLDP; Rtelnet; SMTP; SNMPv1/v2c; TCP/IP; Telnet; UDP |
| Filter | IGMP v1/v2 |
| Time Management | SNTP |
| Authentication | Local database |
| Encryption | HTTPS; AES-128; RSA-1024; SHA-1; SHA-256 |
| Security Protocols | HTTPS (TLS 1.2); SNMPv3 |
| Connector | Terminal block |
| No. of Ports | 4 |
| Serial Standards | RS-422; RS-485 |
| Operation Modes | Real COM; TCP Server; TCP Client; UDP; Ethernet Modem; Pair Connection; Reverse Telnet; Disabled |
| Baudrate | Supports standard baudrates (unit=bps): 50, 75, 110, 134, 150, 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 19200, 38400, 57600, 115200, 230.4k, 460.8k, 921.6k |
| Data Bits | 5, 6, 7, 8 |
| Stop Bits | 1, 1.5, 2 |
| Parity | None, Even, Odd, Space, Mark |
| Isolation | 2 kV |
| Pull High/Low Resistor for RS-485 | 1 kilo-ohm, 150 kilo-ohms |
| RS-485 Data Direction Control | ADDC (automatic data direction control) |
| RS-422 | Tx+, Tx-, Rx+, Rx-, GND |
| RS-485-4w | Tx+, Tx-, Rx+, Rx-, GND |
| RS-485-2w | Data+, Data-, GND |
| Input Current | 430 mA @ 12 VDC |
| No. of Power Inputs | 2 |
| Power Connector | 1 removable 3-contact terminal block(s); Power input jack |
| Input Voltage | 12 to 48 VDC, 24 VDC for DNV |
| Automatic Reboot Trigger | Built-in WDT |
| Alert Tools | Built-in buzzer and RTC (real-time clock) |
| Housing | Metal |
| Dimensions (with ears) | 181 x 103 x 33 mm (7.14 x 4.06 x 1.30 in) |
| Dimensions (without ears) | 158 x 103 x 33 mm (6.22 x 4.06 x 1.30 in) |
| Weight | 740 g (1.63 lb) |
| Installation | Desktop; DIN-rail mounting (with optional kit); Wall mounting |
| Operating Temperature | 0 to 55°C (32 to 131°F) |
| Storage Temperature (package included) | -40 to 75°C (-40 to 167°F) |
| Ambient Relative Humidity | 5 to 95% (non-condensing) |
| EMC | EN 55032/35 |
| 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 1 GHz: 3 V/m; IEC 61000-4-4 EFT: Power: 2 kV; Signal: 0.5 kV; IEC 61000-4-5 Surge: Power: 1 … |
| Safety | UL 62368-1 |
| Maritime | DNV |
| Warranty Period | 5 years |
Selecting the right variant
The isolation protects the Ethernet side from ground-potential differences and surges on long RS-485 runs between buildings or across a plant, a common cause of lost serial communication. The terminal block connectors make field wiring simpler than adapting DB9 cables.
On the practical side, mounting is listed as desktop; din-rail mounting (with optional kit); wall mounting; the housing is metal; the stated MTBF is 718,600 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 that your devices are RS-422 or RS-485 (this model has no RS-232 interface), the isolation requirement and the supply voltage, since a 24 VDC input is stated for DNV use before you place an order. Seven Star LLC supplies as an independent company and prices against the precise code requested.
Related models in the NPort 5430I family
Other order codes listed alongside it (7 entries in total): NPort 5410, NPort 5430, NPort 5430I, NPort 5450, NPort 5450-T, NPort 5450I, NPort 5450I-T. Suffixes such as -T generally mark wide-temperature versions and fiber suffixes (M, S, MM, SS with SC or ST) mark the connector and fiber type, but the order code printed on the datasheet governs.
Related MOXA products: Moxa NPort 5450 4-Port RS-232/422/485 Serial Device Server, Moxa NPort 5232 2-Port RS-422/485 Serial Device Server, Moxa NPort 5410 4-Port RS-232 Serial Device Server, Moxa NPort 5150A 1-Port RS-232/422/485 Serial Device Server, Moxa NPort 5250A 2-Port RS-232/422/485 Serial Device Server and Moxa NPort 5650-8 8-Port RS-232/422/485 Rackmount Device Server.
Documents and quotation
More products in this range: Industrial Communications. The attached file is Moxa’s published datasheet for the family (moxa-nport-5400-series-datasheet-v2.1). For a quotation, send the full order code, the quantity required and where the goods are to be delivered.
Datasheets & Documents
- Datasheet Moxa NPort 5400 series datasheet v2.1 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 NPort 5430I 4-Port RS-422/485 Isolated Device
Answers from our engineering team on installation, compatibility and integration.
01What is the Moxa NPort 5430I?
Moxa lists it as: 4-port RS-422/485 serial device server with 2 kV isolation. A four-port serial device server for RS-422 and RS-485 only, with 2 kV isolation on the serial side and terminal-block connectors instead of DB9.
02What power supply does the NPort 5430I need?
The Moxa specification gives an input voltage of 12 to 48 VDC, 24 VDC for DNV. Check the terminal arrangement and, where relevant, the redundant-input wiring against your panel supply before ordering.
03What operating temperature range applies to the NPort 5430I?
The listed operating temperature is 0 to 55°C (32 to 131°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 serial interfaces does the NPort 5430I offer?
The datasheet lists RS-422; RS-485 on Terminal block, with 4 serial port(s).
05Where is the NPort 5430I datasheet and how do I ask for a quotation?
You can download the Moxa datasheet from this page. For a quotation, send us the full order code, quantity and destination; Seven Star LLC is an independent supplier based in Muscat.
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