If I understand, you want a device to connect to I/O field devices at a remote location, and then, via a communication cable, send this I/O data to a Click PLC. Yes, this can be done. I will assume your Click has an available RS232 serial port. One way, of many, could be to have a Click at the remote location, connected to your remote I/O field devices, and setup as a Modbus RTU Slave. And your main Click setup as a Modbus RTU Master. RS232 is capable of short distances, depending on cable type, etc., 50-ft. If the comm. cable distance is longer, you can use RS232-to-RS485 converters. Also, consider comm. loss detection and lost-comm. alarm response actions.

I have a Pair of Click's communicating by WiFi through the Corporate WiFi Scheme, they share analog and Digital Data to Each Other..

My 'Remote' end has this for a Display output located in it's Pelican Case we call the 'Lunch Box'.

https://www.ebay.com/itm/195880685247?_skw=Modbuss+5+digit+led+display&itmmeta=01KTM93A9ZQVF2QEP0N2NKD8QM&itmprp=enc%3AAQALAAAA4GfYFPkwiKCW4ZNSs2u11xCYw%2Bq60IFD15MSYaVo5bHudqNT7X571cf43%2FASOUaSNvb0R9kBoR%2BjnqBMlkG3eQ2UXrQ6BJuNsj--EWN8aaEd80%2BNTkf41zaTWaHIDfrZWdMwlqdW1SM7CkdQgtMv6RwU3H1R8oX4ca0qzcVfyWuAaamLlJiCudDYGtdvmRINl4GOItoToRE0yVB1ioSHpsthDf91x%2Fc5nGBb0LEVyurPhPb2kByo59LXL0Mn71MmrGg4xh1OK1zqwfBSDJ1TKa9cNlfR3T0QwsLQBQ4gzy8H%7Ctkp%3ABk9SR5CmjYnVZw

They are sold various places.. Cheep and Hard to Communicate with until you get it figured out ( ModBus ).. and the Plug I was able to locate was available through Mouser, and I had to assemble and Crimp.. Solder would have been faster.. But not as elegant.

Click can do lots of things.. What is your Application..

Cap