GBU643D*S GBU643D*S (GBU643D-S) Base Rack for S2T/S2, 4 Station Bus Slots, no I/O slots. N $590.00 | 50W12DC24 50W12DC24 (SD-50A-24) 50 watt DC-DC 12 to 24volt power supply $59.95 | EX10-MDO32 EX10-MDO32 Transistor Output Card, 32 Pts, 5-24Vdc, Current Sinking for Toshiba $349.00 |