Electrical equipment in the closed system Electrical interface description

Electrical equipment in the closed system must be interconnected by electrical interfaces. Requirements for electrical interfaces include:
1. Mechanical (geometry, number of contacts and wires) matching to ensure reliable electrical connections for a given operating condition. For this purpose, standardized plug-in connectors, screw-in connectors or other standardized connectors must be used. In addition, national and regional standards and types of protection (UR, UL, CSA, EN, ATEX, IP, etc.) must be considered.
2. Electrical (input resistance, time constant, frequency response, etc.) matching, so that the signal of the upstream device can be correctly received and processed by the downstream device. If standard signals (standard current and voltage signals) are used, the electrical interfaces are standardized and compatible, regardless of which company produces them. However, for non-standard signals, dedicated transmitters or additional equipment are required for signal processing or signal conversion.
Electrical matching requires an electrical interface for easy identification. When connecting the interface, you must use a qualified connection cable and properly connect the signal output and signal input (do not reverse!)