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Brand: MOXA
Moxa NPort IA5250A 2-Port Industrial Device Server
Description
How the NPort IA5250A puts serial devices on Ethernet
NPort IA5250A is listed by Moxa as: 2-port RS-232/422/485 industrial automation device server with serial/LAN/power surge protection, 2 10/100BaseT(X) ports with single IP, 0 to 60°C operating temperature. A two-port DIN-rail device server for industrial automation, with surge protection on the serial, LAN and power lines and two 10/100BaseT(X) ports sharing a single IP address.
From the manufacturer’s specification table, the power input is 12 to 48 VDC; operating temperature is 0 to 60°C (32 to 140°F); dimensions are 36 x 105 x 140 mm (1.42 x 4.13 x 5.51 in); weight is 485 g (1.07 lb).
Standards and approvals printed for this model include hazardous-location listings of ATEX Zone 2; UL/cUL Class I Division 2 Groups A/B/C/D; safety standard UL 508. 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) | Supports 2 IP addresses; Auto MDI/MDI-X connection |
| 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 |
| Connector | DB9 male |
| No. of Ports | 2 |
| Serial Standards | RS-232; RS-422; RS-485 |
| Operation Modes | Disabled; Ethernet Modem; Pair Connection; Real COM; Reverse Telnet; RFC2217; TCP Client; TCP Server; UDP |
| 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 |
| Flow Control | None; RTS/CTS (RS-232 only); DTR/DSR (RS-232 only); XON/XOFF |
| Pull High/Low Resistor for RS-485 | 1 kilo-ohm, 150 kilo-ohms |
| Terminator for RS-485 | 120 ohms |
| RS-485 Data Direction Control | ADDC (automatic data direction control) |
| RS-232 | TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND |
| RS-422 | Tx+, Tx-, Rx+, Rx-, GND |
| RS-485-4w | Tx+, Tx-, Rx+, Rx-, GND |
| RS-485-2w | Data+, Data-, GND |
| Input Current | 250 mA @ 12 VDC |
| Input Voltage | 12 to 48 VDC |
| No. of Power Inputs | 2 |
| Power Connector | Terminal block |
| Housing | Metal |
| Dimensions | 36 x 105 x 140 mm (1.42 x 4.13 x 5.51 in) |
| Weight | 485 g (1.07 lb) |
| Installation | DIN-rail mounting; Wall mounting (with optional kit) |
| Operating Temperature | 0 to 60°C (32 to 140°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 |
| Hazardous Locations | ATEX Zone 2; UL/cUL Class I Division 2 Groups A/B/C/D |
| Safety | UL 508 |
| Vibration | IEC 60068-2-6 |
| Shock | IEC 60068-2-27 |
| Freefall | IEC 60068-2-32 |
| Green Product | RoHS, CRoHS, WEEE |
| Warranty Period | 5 years |
Where it fits and what to check
The two Ethernet ports allow daisy-chaining of several units along a machine line without an extra switch, which saves cabling in conveyor and packaging layouts. Each serial port is DB9 male and selectable between RS-232, RS-422 and RS-485.
On the practical side, mounting is listed as din-rail mounting; wall mounting (with optional kit); the housing is metal; the stated MTBF is 262,805 hrs; the warranty period is 5 years. Treat the MTBF as a manufacturer prediction under its stated method, not a guarantee for your site.
Before ordering, confirm the isolation and temperature options (the IA5000A family has -T and I versions), the connector type and the supply voltage in your control panel. Seven Star LLC is an independent supplier in Muscat and quotes against the exact code you give us.
Related models in the NPort IA5250A family
Other order codes listed alongside it (20 entries in total): NPort IA5150A, NPort IA5150A-IEX, NPort IA5150A-T, NPort IA5150A-T-IEX, NPort IA5150AI, NPort IA5150AI-IEX, NPort IA5150AI-T, NPort IA5150AI-T-IEX, NPort IA5250A, NPort IA5250A-IEX, NPort IA5250A-T, NPort IA5250A-T-IEX, NPort IA5250AI, NPort IA5250AI-IEX, NPort IA5250AI-T, NPort IA5250AI-T-IEX, NPort IA5450A, NPort IA5450A-T, NPort IA5450AI, NPort IA5450AI-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 IA5150A 1-Port Serial Device Server, Moxa NPort 5210A 2-Port RS-232 Serial Device Server, Moxa NPort 5110A 1-Port RS-232 Serial Device Server, Moxa NPort 5250A 2-Port RS-232/422/485 Serial Device Server, Moxa NPort 5410 4-Port RS-232 Serial Device Server and Moxa NPort 5232 2-Port RS-422/485 Serial Device Server.
Documents and quotation
More products in this range: Industrial Communications. The Moxa datasheet for this family (moxa-nport-ia5000a-series-datasheet-v1.6) is attached to this page. Request a quotation with the exact order code, quantity and delivery location, and we will respond with availability.
Datasheets & Documents
- Datasheet Moxa NPort IA5000A series datasheet v1.6 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 IA5250A 2-Port Industrial Device Server
Answers from our engineering team on installation, compatibility and integration.
01What is the Moxa NPort IA5250A?
Moxa lists it as: 2-port RS-232/422/485 industrial automation device server with serial/LAN/power surge protection, 2 10/100BaseT(X) ports with single IP, 0 to 60°C operating temperature. A two-port DIN-rail device server for industrial automation, with surge protection on the serial, LAN and power lines and two 10/100BaseT(X) ports sharing a single IP address.
02What power supply does the NPort IA5250A 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 NPort IA5250A?
The listed operating temperature is 0 to 60°C (32 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 serial interfaces does the NPort IA5250A offer?
The datasheet lists RS-232; RS-422; RS-485 on DB9 male, with 2 serial port(s).
05Where is the NPort IA5250A 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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