W&T connects
Interfaces for TCP/IP, Ethernet, RS-232, RS-485, USB, 20mA, glass and plastic fiber optic cable, http, SNMP, OPC, Modbus TCP, I/O digital, I/O analog, ISA, PCI
Manuals:

Web-IO 4.0 230V Relay


Current manuals:

Startup and use
Date Comment Revision
August 8, 2019 Valid for firmware 1.35 and higher 1.35
PDF download
Programming and protocols
Date Comment Revision
July 12, 2017 Valid for firmware 1.10 and higher 1.15
PDF download