RS232 RS422 RS485 to
LAN 10BaseT converter

DIN Rail LAN 10BaseT converter - multi-port
1 - 2 - 3 - 4 - 5 - 8 port
RS232 RS422 RS485 to TCP, UDP, IP, ICMP, ARP, RARP,  LAN converter
Internet enable any device that has RS-232 RS-485 RS-422 port Easy configuration through software menu

The AI-7188 is a multi-port LAN to Serial Device Server for Ethernet to serial applications. The Device features full serial handshake signals and 10BaseT network interface. The AI-7188 makes it easy to network enable any device that has a serial port.

Internet Embedded Controller


  • AMD 80188-40 Embedded CPU, or compatible
  • Supports a variety of TCP/IP features, including TCP, UDP, IP, ICMP, ARP, RARP,
  • 10BASE-T NE2000 compatible Ethernet Controller
  • Re-loadable Operating Software
  • Remote Configuration
  • Diagnostics
  • 64-bit hardware unique serial number inside
  • COM driver support interrupt & 1K QUEUE input buffer
  • Support serial port
  • Built-in NVRAM, EEPROM
  • Built-in self-tuner ASIC controller on RS-485 port
  • AI-7188E1 support one RS-232 port
  • AI-7188E2 support one RS-232 port and one RS-485 port
  • AI-7188E3 support one RS-232 port, one RS-485 port, one RS-422/485 port and several DI/O lines
  • AI-7188E4 support three RS-232 ports and one RS-485 port
  • AI-7188E5 support four RS-232 ports and one RS-485 port
  • AI-7188E8 support seven RS-232 ports and one RS-485 port
  • 7-segment LED display for AI-7188ND
  • Built-in MiniOS7
  • Program download port: COM1 or Ethernet Port ( Available soon )


  • CPU: Am188™ES, 40M Hz or compatible
  • SRAM: 256K bytes
  • Flash Memory: 256K bytes; Erase unit is one sector (64K bytes); 100,000 erase/write cycles
  • NVSRAM: 31 bytes, battery backup, data valid up to 10 years
  • EEPROM: 2048 bytes ( 8 blocks, each block has 256 bytes); Data retention > 100 years; 1,000,000 erase/write cycles.
  • Ethernet port: 10Base-T
  • Watchdog timer provides fault tolerance and recovery
  • Low power consumption
  • R.O.C. Invention Patent No. 086674, No.103060, No. 132457
  • RS-485 interface connector for I-7524/7527: 14-pin screw terminal block ( accepts 16~22 AWG wires ); 3.5mm pitch
  • D/I: 3.5V~30V
  • D/O: 150mA/30V
  • Accessories: One download cable, one mini screw driver
  • Operating temperature: -30C to 75C
  • Storage temperature: -40C to +80C
  • Dimensions: 123mm x 72mm x 33mm
  • Power requirement: Unregulated 10~30 VDC with protection from power reversals
  • Power consumption:
  • 2W (without display)
  • 3W (with display)


  • Factory Automation
  • Building Automation
  • Home Automation


  • PWR-24/110: wall-plug power Adapter / 110VAC, 60Hz, 3.6W
  • PWR-24/220: wall-plug power Adapter / 220VAC, 50Hz, 3.6W


The AI-7188X, Embedded Internet/Ethernet Controller, focuses in Embedded Control applications while theAI-7188N, Internet Communication Controller, focuses in communication applications. According to different embedded firmware and application program, the Internet Communication Controller can be used as Device Server or Addressable Ethernet to RS-232/485/422 Converter or Embedded Internet/Ethernet Controller. The user should refer to comparison table to choose optimal product. Now we offer wide range Internet Communication Controllers, such as AI-71881 / E2 /E3 /E4 / E5 / E8. Except the RTC circuitry, the basic hardware ofAI-7188N is similar toAI-7188X. Since there are too many configurations for AI-7188N series product, OEM or ODM version is welcomed.

Can be used as Addressable Ethernet to RS-232/485/422 Converter

Most RS-232/485/422 devices do not support device address. The AI-7188N series can assign a unique address to any RS-232 device installed in the Ethernet network. Host-PC can send command with device address to Ethernet network, the destination AI-7188N will remove the address field & pass the other fields of command to its local RS-232 device. The response of this local RS-232 device will be passed to host-PC via this destinationAI-7188N.

Can be used as Ethernet to RS-232/485/422 Device Server

The Device Server is an appliance that network enables any device with a serial communication port. By virtue

of its independent operating system, protocol independence, small size and flexibility, Device servers are able to meet the demand of virtually any network-enable application. Most devices do not have network ports. Our Internet Communication Controllers allow those devices to become connected to the network.

Can be used as Embedded Internet/Ethernet Controller

Except the Real Time Clock, the hardware and software ofAI-7188N is similar to AI-7188X. The user can use well-developed libraries and demo programs to implement an Embedded Internet/Ethernet Controller.

Selection Guide
Model Number AI-7188E1
1 port
2 port
3 ports
4 ports
5 ports
8 ports
CPU (80188) 40M 40M 40M 40M 40M 40M
SRAM 256k 256k 256k 256k 256k 256k
Flash 256k 256k 256k 256k 256k 256k
Ethernet Port 10 BaseT 10 BaseT 10 BaseT 10 BaseT 10 BaseT 10 BaseT
COM 1 Port
Program download
COM 2 Port - RS-485(Note3) RS-485(Note3) RS-485(Note3) RS-485(Note3) RS-485(Note3)
COM 3 Port - RS-232(Note4) RS-422(Note6)
RS-232(Note4) RS-232(Note4) RS-232(Note5)
COM 4 Port - - - RS-232(Note3) RS-232(Note1) RS-232(Note2)
COM 5 Port - - - - RS-232(Note1) RS-232(Note2)
COM 6 Port - - - - - RS-232(Note2)
COM 7 Port - - - - - RS-232(Note2)
COM 8 Port - - - - - RS-232(Note2)
DI - - 4 - - -
DO - - 4 - - -
Real Time Clock N N N N N N
Embedded O.S. MiniOS7 MiniOS7 MiniOS7 MiniOS7 MiniOS7 MiniOS7
Note1: RS-232 /RS-485
  • RS-485: D2+, D2-; Self-tuner inside
  • RS-232: TXD,RXD,RTS, CTS
  • DB-9 male connector

Note2: RS-232 / RS-485

  • RS-485: D1+, D1-; Self-tuner inside
  • RS-232: TXD,RXD,RTS, CTS

Ordering Information




Internet Communication Controller


AI-7188E1 with seven-segment display


Internet Communication Controller


AI-7188E1 with seven-segment display


Internet Communication Controller


AI-7188E3 with seven-segment display


Internet Communication Controller


AI-7188E4 with seven-segment display


Internet Communication Controller


AI-7188E5 with display


Internet Communication Controller


AI-7188E8 with display

AI-7188E1 Internet Communication Controller

AI-7188E2 2-Port Internet Communication Controller

AI-7188E3 3-Port Internet Communication Controller with Digital I/O

AI-7188E4 4-Port Internet Communication Controller call for 8 port prices


min Quick start Manual .6 meg pdf file

full Manual  6 meg pdf file

full Software Manual  5.5 meg pdf file


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