Digital Equipment AlphaStation 500 Series, User Information

Page: 23 / 152

System Overview
AlphaStation 500 Series User Information 1-5
Table 1-2 Rear Connectors
Figure
Legend
Item Function
1 On/Off Switch Power
2 Voltage selection
switch
Allows user to set voltage from factory set 230V
to 115 VAC power
3 Lock Slot Use with optional Kensington type security lock
4 System (chassis)
lock Provides security for internal components.
5 Sound card stereo
LINE OUT
connector Routes audio signals to an external amplifier
6 Sound card stereo
headphone jack Connects headphones, or amplified speakers
7 Top Cover Screw Secures top cover
8 Sound card
microphone jack Connects microphone (2.2Ohm to 2.5V)
9 Sound card stereo
LINE IN connector Brings audio signals into the card (for example,
from a stereo amplifier)
10 Twisted Pair
connector Connection to the embedded Ethernet controller
11 ThinWire connector Connection to the embedded Ethernet controller
12 64-bit PCI
expansion slot Used for PCI expansion options
13, 14, 15 32-bit PCI
expansion slots In this example, a PCI graphics adapter is shown
in the bottom slot. It provides the interface
between the video/graphics expansion module
(option) and the supported monitor.
16 Enhanced bi-
directional parallel
port Connects an industry-standard parallel printer or
other parallel device
17 Wide SCSI
connector - 68-pin Provides the interface between the system unit
and external SCSI devices
18 Keyboard connector Connects a VMS or PS/2 style keyboard
19 Mouse connector Connects a PS/2-compatible mouse
20 COM1 - Serial port
connector Connects serial devices
21 COM2 - Serial port
connector Connects serial devices
22 AC power connector Connects the system to AC power