Try a Regul R200 PLC on Black Friday sale. Limited time offer – 579 EUR (net of VAT and shipping) for a package with CPU, 4 analog input, 8 digital input, 8 digital output. Only from November 23 to December 8.
Fast, hot-swappable, extendable. Major protocols (Modbus TCP/RTU, OPC UA/DA, IEC 101/104) are available in the CPU without extra fees.
Freely programmable with IEC 61131-3 languages in Epsilon LD software (download [Download not found]).