Functional introduction

The Modbus protocol is the most widely used protocol in the electronic industrial equipment, and now it has become a general industrial standard. Through this protocol, Modbus devices (such as PLC, DCS, HMI, and instruments) can communicate with each other through a network or serial port. But the Modbus protocol used in the serial port and the Ethernet network is different, so a gateway is needed to complete the communication conversion between the two protocols. IDM-7842MG is a modbus gateway product dedicated to connecting Modbus TCP devices and Modbus RTU/ASCII devices.

IDM-7842MG is an isolated Modbus gateway device with multiple network ports. It integrates 5 port 10/100Mswitches and 2 serial port Modbus gateways. Users can use any port and 2 port RS-485/232 serial port to convert Modbus TCP and Modbus RTU/ASCII protocol. The 2 port RS-485/232 serial port has photoelectric isolation. It is integrated with Modbus TCP, Modbus RTU and Modbus ASCII protocol, and the serial port can be configured flexibly into RS-485 or RS-232 mode through software, which can easily realize the connection between Modbus Ethernet device and Modbus serial device.

Product features

1, 32 bit ARM Cortex-m3 CPU

2, 5-Ports 10/100MEthernet interface, with switch function

3, Support 2-Port RS-485/232 serial port, two serial port can set different baud rate

4. RS-485/232 serial port photoelectric isolation, 1500V isolation voltage, 600W surge protection, 15KV electrostatic protection

5. Redundant DC9~30V or AC18~30V dual power input

6. Integrated  IEEE 802.3 10Base-T,IEEE 802.3u 100Base-T(X),ARP, IP, ICMP, IGMP, UDP, TCP, DHCP, DNS,MODBUS TCP, MODBUS RTU, MODBUS ASCII protocol

7. Provide 4 mode of work:

RTU_ Master--TCP_ Slaver, TCP_ Master--RTU_ Slaver

ASCII_ Master--TCP_ Slaver, TCP_ Master--ASCII_ Slaver

8. Maximum support for 32 Modbus TCP master stations and 4 Modbus TCP slave stations

9. Support two Modbus RTU/ASCII master stations and Modbus slave communication

10. The automatic adaptive function of the time interval of the character

11, Provide ID mapping function to realize the management of host ID number

12. The local port, the target IP address, and the target port number can be set

13, Can be configured through Web Server, Telnet, MG Configuration tools

14, MG Configuration tools support

Windows98/me/NT/2000/XP/WIN7/WIN8/WIN10 operating system

15, DIN-Rail Mounting, industrial design, can run steadily in bad environment

Product specification

Ethernet

Standard:  5-Ports 10/100Mbps adaptive Ethernet port

Communication mode:  full duplex / half duplex adaptive

Transmission distance:  less than 100 meters

Interface type:  RJ-45

Serial port

Interface:  2-Port RS-485/232, Photoelectric isolation

RS-232:   T, R, G

RS-485:   D+, D-

Parity bit:  None\Even\Odd\space\mark

Data bits:   6bit, 7bit, 8bit

Baud rate:   300BPS to 230400bps

Direction control:   RS-485 uses data flow direction automatic control technology

Load capability:    RS-485 terminal support maximum 128 node polling

Transmission distance:   RS-485 is 1000 meters,RS-232 is 10 meters

Interface protection:   1500V isolation, 600W surge protection, 15KV ESD protection

Power Supply

Power input:   AC18~30V or DC9~30V, Double redundant input

Power consumption:   240mA @ 24V (Max)

Environmental

Working temperature:  -20 C~70 C

Storage temperature:  -40 C~95 C

Storage humidity:   5 ~ 95% RH

Package size

Restore the default settings

Hardware recovery:   Press the Default key to restart the power and wait for 3 seconds to undo the Default key to restore the factory settings.

Software recovery:    Search the device through the MG Configuration tool software and click to restore the factory settings button.

LED instructions

Power indication:   "P1",”P2”bright yellow is the normal power supply

Serial Port 1 sending and receiving indication:   "COM1" is Flash

Serial Port 2 sending and receiving indication:   "COM2" is Flash

Interface definition

RS-232 ： COM1(T, R, G) / COM2(T, R, G)

RS-485 ： COM1 (D+, D-) / COM2(D+, D-)

Network interface: 5-Ports RJ45 (Ethernet)

Power interface:  P1 (V+, V-), P2 (V+, V-)