For example, the charging interface of a mobile phone has only a few specifications. As long as the specifications are the same, no matter which charger is available. There are detailed agreements on plug shape, wiring sequence and power supply voltage and current among mobile phone, charging cable and charger. This job is standardization.
Equipment that conforms to standardization is standardized equipment.
Accordingly, equipment that does not have this standard, or partially does not meet the standard, is non-standard equipment.
Standardization of automation equipment mainly includes standardization of electrical interface, power supply specification, process interface, signal specification, communication protocol, installation size, etc. The scope of automation equipment is too large, and here are just some standards for thermal instruments.