Overvoltage protection. Measurement, control, and regulation with signaling function and function display. The following signals are covered by the protection of analog signals and current loops (CL - Current Loop): Signals from current loops (analog measurements from encoders over long distances) 4...20 mA, 0...20 mA, etc. Two-, three-, and four-wire without common reference potential, e.g., level measurement. Signals from voltage transmitters (analog measurements of transmitters over short distances) 0...10 V, PT 100, etc., e.g., temperature measurement. Pluggable arrester with interruption-free and impedance-neutral plugging or unplugging. Testable by test instrument V-TEST. Space-saving design for 2 analog signals. Design with ground-free PE connection to avoid potential differences. Applicable according to installation standard IEC 62305 (D1, C1, C2, and C3). Integrated PE foot safely dissipates up to 20 kA (8/20 μs) and 2.5 kA (10/350 μs) to PE. Colored marking of voltage levels for quick identification in the control cabinet. Safety function by coding element for different voltage levels.