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The MODDA 4-channel solid state relay (SSR) module (SSR) can be used to quickly and efficiently switch on and off AC loads without using moving parts (such as a classic electromechanical relay).The SSR module uses a phototriac to provide galvanic isolation between the logical plane and the AC load side. All four channels can be switched on with a high logic level signal (3 - 5 V) by providing a low logic level signal (0 - 1.5 V) at its corresponding channel signal input.Note that this module can only switch alternating currents up to a maximum of 2 A with a maximum voltage of 240 V AC. If you try to use this module to change DC loads or exceed the specified limits, the module and / or your connected devices may be damaged!This text is machine translated.