The S274 provides 8 digital inputs, 6 analog or PT100 Resistance Temperature Detector (RTD) inputs,4 relay outputs, 1ambient sensor input for monitoring onsite temperature and humidity, and RS485 serial port,supports 224 mapping registers via Modbus RTU protocol. It can monitoring and operates the I/O ports by SMS, APP, Web Server, internet, timers and programmed inter-lock events automatically. Compatible Modbus TCP and MQTT IoT Protocols,can intergrate to the KPIIOT IoT Cloud Platform or other IoT Cloud Platforms or SCADA or OPC servers.