IBM 86807RY Hardware Maintenance Manual - Page 114

UltraSCSI Ports: Your server has two UltraSCSI bus-master controllers on the I/O function card; one supports internal devices and the other is connected to an external connector for support of external devices. Each controller supports up to 15 SCSI devices. You can use the 68-pin, SCSI connectors for these controllers to expand the capabilities of your server by attaching different types of SCSI devices, such as drives or printers. Table 5 shows the pin-number assignments for the 68-pin SCSI connectors. Table 5. 68-Pin SCSI Port Pin-Number Assignments Pin Signal Pin Signal 1 Ground 2 Ground 3 Ground 4 Ground 5 Ground 6 Ground 7 Ground 8 Ground 9 Ground 10 Ground 11 Ground 12 Ground 13 Ground 14 Ground 15 Ground 16 Ground 17 +Term power 18 +Term power 19 Reserved 20 Ground 21 Ground 22 Ground 23 Ground 24 Ground 25 Ground 26 Ground 27 Ground 28 Ground 29 Ground 30 Ground 31 Ground 32 Ground 33 Ground 34 Ground 35 Data 12 36 Data 13 37 Data 14 38 Data 15 39 Data P1 40 Data 0 41 Data 1 42 Data 2 43 Data 3 44 Data 4 45 Data 5 46 Data 6 47 Data 7 48 Data P0 49 Ground 50 Ground 51 +Term power 52 +Term power 53 Reserved 54 Ground 55 -Attention 56 Ground 57 -Busy 58 -Acknowledge 59 -Reset 60 -Message 61 -Select 62 -Control/Data 63 -Request 64 -Input/Output 65 Data 8 66 Data 9 67 Data 10 68 Data 11 106 Netfinity Server HMM