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
Master TCP : 8 simultaneous TCP Master , 32 simultaneous Request for each TCP Master

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
Protection : Built-in 1.5KV Magnetic Isolation

WiFi
2.4G WiFi IEEE 802.11 b/g/n
Support  AP / Station ( Infrastructure )
IPEX cable & Antenna ( Optional )

Serial Ports
1 x RS232/RS485/RS422
1 x RS232/RS485
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 : 5 ~ 12 V

2 x Digital Output ( Active High / Active Low Selectable ) ( 2 pins optional for DI)

120VAC @ 2A , 240VAC @ 1A , 24VDC @ 3A

I2C Interface x 1 port ( for RTC )
RTC : Real Time Clock x 1 ( Battery Backup )
microSD Card Slot x 1 ( for Storage )
Mini-PCIE slot x 1 : USB 2.0 interface for 3G / 4G LTE
Nano SIM slot x 1 : GPIO x 1 for SIM Registration Status LED, LED for 4G LTE Mini-PCIe
GPIO x 1 for Reset 4G LTE
GPIO x 1 for System Reset button
Buzzer x 1
Watch Dog Function (CPU built-in)
Power : DC9~32V/1000 mA , 500mA@12V , support DC Jack & Terminal Input

LED Lamp : to be programmed
PWR-Green
Alarm-Red 7688 GPIO
RSSI-Green 7688 GPIO
LAN ACK-Green Link-Orange
Serial 0 RX & TX, Serial 1 RX & TX
DI x 2, DO x 2

Operating Temperature : -20 °C ~ 70 °C
Storage Temperature : -25 °C ~ 80 °C
Dimensions : 180 x 120 x 35 mm ( W x D x H )
Weight : 950 g
Compliant with RoHS
Hardware warranty :  1 year

Remote I/O Model Comparison

Modbus MQTT Model Comparison