SCA818S Backplane User’s Guide 2. Jumper Settings and Pin Defi nitions A. Front Jumpers and Connectors Front Jumper/Connector Locations B F + + + JP21 E I C 2 D JP19 JP22 JP23 JP20 JP17 C + A C + JP18 +5V +12V GND GND + +5V +12V GND + + +12V +5V GND SCA818S UPER S R Front View (*See below for front connector/jumper descriptions.) A-2. Front Panel Connectors A. JP10: Backplane Main (4-Pin) PWR B. LVD1: SCSI Channel C. J1, J2: CD-ROM/Floppy Drive (4-Pin) PWR Connector D. 318 GEM Chip E. JP9: I 2 C Connector F. D4: Overheat/Drive Fail LED Indicator Front Connectors and Pin Defi nitions A :
SCA818S Backplane Main Power (J10) Backplane Main Power Connector Pin Defi nitions You must use the 4-pin power Backplane Main PWR 4-pin Connector (J10) connector (J10), marked "A" on the layout above, to provide adequate power supply to the Backplane. See the table on the right for pin defi nitions. C: CD-ROM/Floppy Drive Power Connectors CD-ROM/FDD Power Connector Pin Defi nitions You must use the 4-pin power con- nectors (J1, J2), marked "C" on the layout above, to provide power supply to the CD-ROM and Floppy Drives. See the table on the right for pin CD-ROM/FDD PWR 4-pin Connectors defi nitions. A-4 Pins # Definition 1 2 & 3 4 +12 V Ground +5V Pins # Definition 1 2 & 3 4 +5 V Ground +12V