GBU666**S GBU666**S (GBU666--S) Base Rack for S2E, 5 I/O Slots/ Expansion Rack for S2T/S2, $300.00 | GDI634**S GDI634**S GDI634--S DC Input Module, 32 points, 24 Vdc $500.00 | EX10-MDO32 EX10-MDO32 Transistor Output Card, 32 Pts, 5-24Vdc, Current Sinking for Toshiba $349.00 |