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• 17:40, 28 February 2025 GMalcom talk contribs created page Installing and Configuring of Z3-Plus with TTA-3 (Created page with "The Z3-Plus is a 2-Wire audio overlay track circuit operating on 9 to 24VDC and is field configurable for the following track drive frequencies: 8.2K, 10K, 11.5K, 13.2K, 15K, 17.5K, 20K, 26KHz. The TTA-3 is a surge protection for the Z3-Plus and is Comet’s recommendation. '''Materials:''' {| class="wikitable" style="border-collapse: collapse; width: 50%; background-color: rgb(255, 255, 255); margin-left: auto; margin-right: auto; height: 92px;" border="1px" cellpaddi...")