Reading from digital input using Modbus TCP/RTU and http CGI commands.

Sending command to digital output using Modbus TCP/RTU and http CGI commands.

Modbus TCP To RTU Slave
Modbus RTU Master To TCP Slave
Modbus TCP To ASCII Slave
Modbus ASCII Master To TCP Slave

Easy setup via web browser

CPU : MT7688AN MIPS CPU , 580 MHz
RAM : 128M Bytes DDR2 RAM
ROM : 32M Bytes Flash ROM
OS : OpenWRT Linux OS

Ethernet
Port Type : 1 x RJ-45
Speed : 10 /100 M bps  ( Auto Detecting )
Protocol : ARP , IP , ICMP , UDP , TCP , HTTP , DHCP
Protocol :PPPoE , DDNS , NTP , FTP , Telnet
Mode : TCP Server / TCP Client / UDP
Setup : HTTP Browser Setup (IE & Netscape), Console
Security : Setup Password
Protection : Built-in 1.5KV Magnetic Isolation

WiFi port
2.4G WiFi IEEE 802.11 b/g/n
Support  AP / Station

Serial Ports
1 x RS232 ( RX/TX only )
1 x RS422/485  ( Surge Protect )
Speed : 300 bps ~ 230.4 K bps
Parity : None , Odd , Even , Mark , Space
Data Bit : 5 , 6 , 7 , 8
Stop Bit : 1 , 2
RS-232 Pins : Rx , Tx , GND
RS-422 : Rx+ , Rx- , Tx+ , Tx- ( Surge Protect )
RS-485 : Data+ , Data- ( Surge Protect )
15KV ESD for all signals

Digital Input / Digital Output
2 x Digital Input ( Active High / Active Low Selectable )

Dry contact : Logic level 0 : close to GND , Logic level 1 : open
Wet contact : Logic level 0 : 0~3 V , Logic level 1 : 10 ~ 30 V

2 x Digital Output ( Active High / Active Low Selectable )

120VAC @ 10A , 240VAC @ 7A , 24VDC @ 10A

Modbus TCP/RTU gateway function
Modbus TCP To RTU Slave
Modbus RTU Master To TCP Slave
Modbus TCP To ASCII Slave
Modbus ASCII Master To TCP Slave

Digital I/O control method
Modbus TCP
Modbus RTU
Http CGI commands

Utility : Built-in Web server Setup, Easy Operation
Master TCP : 8 simultaneous TCP Master, 32 simultaneous Request for each TCP Master
Watch Dog Function
Power : DC 9~32 V , 1000 mA  1000mA@12V, support DC Jack & Terminal Input
Led Lamp : SYS (PWR) , LAN , RX , TX
Operating Temperature : -20 °C ~ 70 °C
Storage Temperature : -25 °C ~ 80 °C
Dimensions : 180 x 110 x 30 mm ( W x D x H )
Weight : 350 g
Compliant with RoHS
Regulatory Approvals : EMC : FCC Class A, CE Class A
Hardware warranty :  1 year

Remote I/O Model Comparison

Modbus MQTT Model Comparison