GBU648E*S GBU648E*S (GBU648E-S) Base Rack for S2T/S2, 8 Slots (Up to 5 station bus slots). $640.00 | BM3549 BM3549 Hi-pot Tester - Gigohm Insulation Tester - Multimeter $249.00 | TCNV485-CMOS TCNV485-CMOS CMOS to RS422/485, 2 wire/4 wire. RJ45 connector for Toshiba ASDs. $90.00 |