I am very new with this hardware and not an expert… however, from what I have learned so far I think you should be able to use the NCD Industrial IoT Edge Computer LTE Cellular Wi-Fi Ethernet
It has the option of using LTE to transmit the data. I would need to have a better understanding of the interfaces available for you PLC (Modbus RTU, Modbus TCP/IP, etc). If it has an ethernet interface available for Modbus TCP/IP, you should be able to hardware between the PLC and the Edge computer. Node-Red should be able to retrieve the data and forward it to the Cloud using an AWS connector or MQTT.
If you need a wireless connection between the PLC and the Edge computer, then you will need an extra piece of hardware depending on the communication interface available on the PLC.