(English) IT-EMG-1104 (RS-232)

(English) IT-EMG-1104 (RS-232)

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4 Ports RS-232 to Ethernet Modbus Gateway

IT-EMG-1104 (RS-232) is an industrial Ethernet Modbus gateway that converts between Modbus TCP and Modbus RTU/ASCII protocols. It provides 4 ports RS-232 serial (RJ45 connector) and 1 port 10/100M Ethernet.

Modbus TCP, Modbus RTU and Modbus ASCII protocol are integrated in the products, users can easily realize the seamless integration of Modbus Ethernet devices and Modbus serial devices and even multi master and slave hybrid networks. At the same time, the user can be set up by Web or Telnet. The simple design can not only realize the fast application, but also guarantee the application of the entire real industrial environment.

The products using EMC protection design, can work in rugged environment. Power has over current, over voltage protection, and can work in rugged environment. The design supports 2 kinds of wall mounting installation, easy to use for your projects.


Ci spiace, ma questo articolo è disponibile soltanto in English. Per ragioni di convenienza del visitatore, il contenuto è mostrato sotto nella lingua alternativa. Puoi cliccare sul link per cambiare la lingua attiva.



  • Support Modbus TCP, Modbus RTU, Modbus ASCII, IP, ARP, DHCP and DNS protocol
  • Support 1 Port 10/100M Ethernet
  • Support 4 Ports RS-232
  • Support WEB and Telnet configuration
  • Convert between Modbus TCP and Modbus RTU/ASCII
  • Support RTU Slave, RTU Master, ASCII Slave, ASCII Master four operating modes
  • Support ID mapping function, to achieve the management of the host ID
  • 300bps~115200bps baud rate and nonblocking communication
  • Support IP address and MAC address filtering function
  • Slave mode support 16 TCP master connections
  • Master mode support 32 slave TCP connection requests
  • Support Response Timeout and Interval Timeout setting
  • Support cross-gateway and cross-router communication
  • IP30 protection grade, metal shell, wall mounted installation
  • No fan, low consumption design
  • Working temperature: -40~75℃




Ethernet ports
Standard: 10Base-T, 100Base-TX
Protocol: Support Modbus TCP, Modbus RTU, Modbus ASCII, IP, APR, ICMP, DNS and DHCP
Signal: Rx+, Rx-, Tx+, Tx-
Speed: 10/100Mbps
Working: Full-duplex and half duplex
Transfer distance: 100m
Connector: RJ45

Serial ports
Serial port number: 4 ports RS-232
RS-232 signal: TXD, RXD, RTS, CTS, GND
Parity bit: None, Even, Odd, Space, Mark
Data bit; 7bit, 8bit
Stop bit: 1bit, 2bit
Baud rate: 300bps~115200bps
RS-232 transfer distance: no more than 15m
RS-232 connector: RJ45
Master mode: 32 TCP slaves
Slave mode: 16 TCP masters
Work mode: RTU Slave, RTU Master, ASCII Slave,
and ASCII Master

LED Indicators
Power (PWR)
Device start delay and running status indicator: RUN
Ethernet port connect status (Link)
Serial port data indicator: TX1~TX4, RX1~RX4;

Power requirements
Input voltage: 9~48VDC
No-load consumption: 0.86W@12VDC
Full-load consumption: 1.2W@12VDC

Environment limits
Working temperature: -40~75℃
Storage temperature: -40~85℃
Relative humidity: 5%~95%(non-condensing)

Shell: IP30 protection, metal shell
Installation: Wall mounting
Weight: 0.46Kg
Size (L×W×H): 160mm×95.5mm×28mm

EMI: EN 55022 Class A, FCC Part 15 Subpart B Class A
EMS: EN 61000-4-2 (ESD), Level 3
Shock: IEC 60068-2-27
Free fall: IEC 60068-2-32
Vibration: IEC 60068-2-6

Warranty time: 3 years

CE, FCC, RoHS, UL508 (pending)

Ordering Informations

IT-EMG-1104 (RS-232)-P (9~48VDC)               4-ports RS-232 to Ethernet Modbus Gateway (10M/100M), DC9~48V, wall mounting

Packing List

1. IT-EMG-1104 (RS-232)-P(9~48VDC) ×1
2. User manual ×1
3. Straight network cable ×1
4. Power adapter ×1
5. CD ×1
6. Warranty card ×1
7. Certificate of quality×1
8. Hangers ×2
9. Mat ×4

Optional accessories

DIN-Rail Mounting Kit (35mm) ×1

Cristian is a brilliant intelligent and great proactivity person and an effective communicator and visionary. He has built a strong (and deserved) reputation as someone with vision, diligence and honor. Cristian is not a simple engineer but he is a real Scientist. His knowledge is not restricted to the area it covers, but its impressive passion for all the technical topics led him to acquire great skills even in areas far from his original studies. Cristian is able to address and solve complex technical problems with excellent results. He is a valuable writer with great scientific background formed with more that 15 years of active research on experimental Nuclear Physics performed in the most famous international research laboratories such as CERN, ESRN, INF. He write about HI-Tech solutions topics and advanced research study applied to industry. He have more than 150 scientific & technical publications. He is also a technical and famous writer in Italy due to his interviews released on the most famous Industrial Italian magazine.

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