Specifications

Installing the AlphaServer IP Platform Hardware
2–8
AlphaServer Intelligent Peripheral Platform Hardware Owner's Guide
Table 2-6: LSI/120 Loop-Start 50-Pin Designations
RING 1 1 26 TIP 1
RING 2 2 27 TIP 2
RING 3 3 28 TIP 3
RING 4 4 29 TIP 4
RING 5 5 30 TIP 5
RING 6 6 31 TIP 6
RING 7 7 32 TIP 7
RING 8 8 33 TIP 8
RING 9 9 34 TIP 9
RING 10 10 35 TIP 10
RING 11 11 36 TIP 11
RING 12 12 37 TIP 12
RING NC 13 38 TIP NC
RING NC 14 39 TIP NC
RING NC 15 40 TIP NC
RING NC 16 41 TIP NC
RING NC 17 42 TIP NC
RING NC 18 43 TIP NC
RING NC 19 44 TIP NC
RING NC 20 45 TIP NC
RING NC 21 46 TIP NC
RING NC 22 47 TIP NC
RING NC 23 48 TIP NC
RING NC 24 49 TIP NC
RING NC 25 50 TIP NC
2.4.1.2 IP Power Controller
The
AlphaServer IP Platform
supports the following power controller models: 120 Vac, 250
Vac, or -48 Vdc. Each simplex and duplex rackmount system has one or two power
controllers located in the bottom of the cabinet. Each controller supports one BA35x-Sx, ISA
bus expansion chassis, and an
AlphaServer
1000A system.
Instructions for wiring the -48 Vdc power controllers to the building's power source are
included in Appendix C.
2.4.1.3 User Alarms
If the
AlphaServer IP Platform
does not use the -48 Vdc power controller, the user can
connect up to three external TTL signal alarms to the 8-pin MJ connector on the alarm
control module. Refer to Appendix B for a pinout of this connector and the
Intelligent
Peripheral Fault Manager for Tru64 UNIX Installation and User's Guide
for information on
configuring these alarms.