[Interface signal]：RS485
[Operating voltage]：DC 8～28V
[Size]：40*111*119.4mm
[Introduction]：The NA281S is a rail-mounted multi-serial port server series independently developed by EBYTE. It integrates a TCP/IP protocol stack, enabling bidirectional transparent data transmission from serial to Ethernet ports, Modbus protocol conversion, and serial device cloud access. Its industrial design ensures stability in harsh working environments, and rich indicator lights provide feedback on different operating states. It supports host computer, AT command, and web page configuration, allowing for easy networking and cloud access for serial devices with simple configuration. It is widely used in industries such as data center monitoring, environmental monitoring, intelligent transportation, gate control, and smart parcel lockers. The product is coated with a conformal coating, providing anti-mildew, anti-moisture, and anti-salt spray properties.
Official Store| Modem | Interface | IC | Network Type | Working frequencyHz | Operating Voltagev | Sizemm | Weightg | Features | Manual | Sample |
|---|---|---|---|---|---|---|---|---|---|---|
| NA281S | RS485 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 40*111*119.4 | 520±5 | Industrial-grade 8-way serial server | ||
| NA281 | RS485 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 40*111*119.4 | 520± 5 | Isolated 8-way serial server | ||
| NA241S | RS485 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 40*111*119.4 | 520±5 | Industrial-grade 4-channel serial server | ||
| NA241 | RS485 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 40*111*119.4 | 520±5 | Isolated 4-way serial server | ||
| NB124ES-V2 | RS485/RS232/RS422 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 145x103x28 | 350± 5 | Second-generation 2-channel serial port server | ||
| NB124E-V2 | RS485/RS232/RS422 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 145x103x28 | 350 ± 5 | Second-generation 2-channel serial port server | ||
| NB124S-V2 | RS485/RS232/RS422 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 145x103x28 | 360 ± 5 | Second-generation 2-channel serial port server | ||
| NB124-V2 | RS485/RS232/RS422 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 145x103x28 | 360 ± 5 | Isolated, second-generation 2-channel serial port server | ||
| NB144ES-V2 | RS485/RS232/RS422 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 198*109*26.5 | 520 ± 5 | Non-isolated, POE-powered, industrial-grade, second-generation 4-channel serial port server | ||
| NB144E-V2 | RS485/RS232/RS422 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 198*109*26.5 | 517 ± 5 | Isolated, POE powered, industrial-grade, second-generation 4-channel serial port server | ||
| NB144S-V2 | RS485/RS232/RS422 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 198*109*26.5 | 520 ± 5 | Industrial-grade, second-generation 4-channel serial port server | ||
| NB144-V2 | RS485/RS232/RS422 | Ethernet | IP, TCP/UDP, IPv4, ICMP, APR, DHCP, DNS, HTTP, MQTT | - | DC 8-28 | 198*109*26.5 | 517 ± 5 | Isolated, second-generation 4-channel serial port server | ||
| NB183ES-V2 | RS485/RS232 | Ethernet | TCP/UDP/MQTT/HTTP | - | DC 8-28 | 198*109*26.5 | 520 ± 5 | Non-isolated, POE-powered, second-generation 8-channel serial-to-Ethernet serial server | ||
| NB183E-V2 | RS485/RS232 | Ethernet | TCP/UDP/MQTT/HTTP | - | DC 8-28 | 198*109*26.5 | 520 ± 5 | Isolated, PoE-powered, second-generation 8-channel serial-to-Ethernet serial server | ||
| NB183S-V2 | RS485/RS232 | Ethernet | TCP/UDP/MQTT/HTTP | - | DC 8-28 | 198*109*26.5 | 520 ± 5 | Non-isolated, second-generation 8-channel serial-to-Ethernet serial server | ||
| NB183-V2 | RS485/RS232 | Ethernet | TCP/UDP/MQTT/HTTP | - | DC 8-28 | 198*109*26.5 | 520 ± 5 | Isolated, bidirectional transparent transmission of 8 serial ports to Ethernet data | ||
| NB124E | RS485/232/422 | ethernet | TCP/IP, UDP, MQTT, HTTP, IPv4, ICMP, APR, DHCP, DNS | - | DC 8～28 | 145x103x28 | 360±5 | Serial port data⇌Ethernet data two-way transparent transmission | ||
| NB144E | RS485/232/422 | Ethernet | TCP/IP, UDP, MQTT, HTTP, IPv4, ICMP, APR, DHCP, DNS | - | DC 8～28 | 198x108x26.5 | 530±5 | Serial port⇌Ethernet data two-way transparent transmission | ||
| NB1A1 | RS485,RJ45 | Ethernet | TCP/UDP/MQTT/HTTP/IP | - | DC 8～28 | 226*130*28.5 | 720 ± 5 | 16-channel serial port data ⇌ Ethernet data bidirectional transparent transmission | ||
| E810-DTU(4RS1E) | Ethernet | RJ45 | RS485/RS232/RS422 | - | DC8～28 | 150*107*29 | 416±5 | Transparent transmission |