The CYDL4(I.S) is a double-level terminal block with two connection points per level, featuring a built-in link that internally connects both levels, making it an excellent solution for circuit distribution in high-density wiring applications. These terminal blocks are an ideal choice for space-saving installations, helping to simplify complex wiring layouts and maximize DIN rail utilization. The CYDLG4(I.S) is the corresponding same-profile ground terminal block, designed to be used alongside CYDL4(I.S) for efficient and compact ground wire connections.