Digital-I/O modules for Ethernet EtherStaxEtherStax ES2113, 2117
Modbus Tcp Iot Rtu 4 Digital Outputs With Rj45 Rs485 Ethernet Module Inside Modbus Rtu/ascii Master M220t - Buy Modbus Tcp Master,Modbus Master Slave,Tcp Client Product on Alibaba.com
Ethernet Digital IO - Metromatics
6 Digital Input 4 Digital Output 4 Analog Input Ethernet Port Rtu Modem For Temperature Sensor - Buy Ethernet Port,Ethernet Temperature Sensor,Digital Input Output Product on Alibaba.com
WuT data sheet: Web-IO Digital 2xIn, 2xOut
ZLAN6842 8 channel remote I/O controller RS485 Ethernet to 8 Digital input Output support modbus TCP RTU replace ZLAN6802|relay remote|relay wirelessrelay gsm - AliExpress
Advantech ADAM-6017: 8ch analog input and 2ch digital output IoT Modbus/SNMP/MQTT Ethernet Remote I/O Module