CTP-4D is a differential input conversion terminal for our 32-bit fast up-down counter card/board CNT32-4MT (CB), CNT32-4MT (LPCI). Differential input is possible by connecting this product between CNT32-4MT(CB), CNT32-4MT(LPCI) and differential output devices. (CNT32-4MT(CB)), CNT32-4MT (LPCI) requires optional cable "CNT-68M/50M". )