[Interface signal]: RS485
[Operating voltage]:DC 8~28V
[Size]:40*111*119.4mm
[Introduction]:NA241 is a series of rail-type multi-serial server products independently developed by Ebyte. It integrates the TCP/IP protocol stack and can realize two-way transparent transmission of data from the serial port to the Ethernet port, Modbus protocol conversion, and cloud access for serial devices. The industrial design ensures the stability of the equipment in harsh working environments, and the rich indicator light effects are used to feedback the different working conditions of the equipment. Supports host computer, AT commands, and web page configuration. With simple configuration, you can easily realize networking, cloud and other functions of serial device. It is widely used in computer room monitoring, environmental monitoring, intelligent transportation, gate control, intelligent express cabinets and other industries. The product is sprayed with conformal anti-paint, which has the functions of "anti-mold", "anti-moisture" and "anti-salt spray".

| Serial number | Name | Explanation |
| 1 | ETH2 | Ethernet port, standard RJ45 interface, 10/100M adaptive |
| 2 | ETH1 | Ethernet port, standard RJ45 interface, 10/100M adaptive |
| 3 | A1 | Channel 1 - RS485 interface A |
| 4 | R1 | Channel 1 - RS485 interface R, short-circuit R1 and B1 to enable the built-in 120Ω matching resistor of serial port 1 |
| 5 | B1 | Channel 1 - RS485 interface B |
| 6 | G1 | Channel 1 - RS485 interface G |
| 7 | A2 | Channel 2 - RS485 interface A |
| 8 | R2 | Channel 2 - RS485 interface R, short R2 and B2 to enable the built-in 120Ω matching resistor of serial port 2 |
| 9 | B2 | Channel 2 - RS485 interface B |
| 10 | G2 | Channel 2 - RS485 interface G |
| 11 | A3 | Channel 3 - RS485 interface A |
| 12 | R3 | Channel 3 - RS485 interface R; short-circuit R3 and B3 to activate the built-in 120Ω matching resistor in serial port 3 |
| 13 | B3 | Channel 3 - RS485 interface B |
| 14 | G3 | Channel 3 - RS485 interface G |
| 15 | A4 | Channel 4 - RS485 interface A |
| 16 | R4 | Channel 4 - RS485 interface R, short-circuiting R4 and B4 to enable serial port 4 with built-in 120Ω matching resistors |
| 17 | B4 | Channel 4 - RS485 interface B |
| 18 | G4 | Channel 4 - RS485 interface G |
| 19 | V+ | DC 8-28 V positive terminal |
| 20 | V- | DC 8-28 V negative terminal |
| 21 | Reload | Restore the factory button, press and hold for 5 seconds after NET stays on for 5 seconds, and the device will be restored to factory settin |