Compaq 810 - Manual (Page 5)

VAX 7000 Model 810
VAX Systems 4.35
Step 4—System Cabinet and I/O Expansion Cabinet (continued)
I/O Expansion Cabinet
H7263-AA/AB 48 V power regulator, 60/50 Hz; maximum three per cabinet (one included). Second regulator may
be required to supply adequate power depending on configuration. See power configuration table
that follows. Third regulator assures redundancy and higher availability in the event of power
regulator failure. Note: The power configuration table provides manual method of determining the
need for second power regulator. Second power regulator is required when configuring five or six
processor systems. Equivalent power unit (EPU) is equivalent value of power used at 48 Vdc by each
option.
H7263-AC/AD Same regulator as above, without battery backup capability
H7238-AA 4 pack battery option; one required per optional 48 V power regulator (H7263-AA/AB) to support
battery backup/UPS capability
H7238-BA/BB Additional batter UPS, includes H7263-AA/AB (BBU capable power regulator and H7238-AA 4
pack battery option.
Note: Maximum four XMI plug-in units per system; total two per cabinet (one included in system cabinet)
DWLMA-AA XMI plug-in unit with 12-slot XMI I/O channel for system cabinet
Step 5—Networks and Communications
DEMNA 802.3/Ethernet controller included with each system. Select additional devices if required. Note: Connection of
system to Ethernet requires an Ethernet transceiver cable. See the Network Products Guide for details.
LAN Communications Controllers
DEMNA-M 802.3/Ethernet controller; one included; total four per XMI, maximum 16 per system.
Requires one XMI slot.
CK-DEMNA-KN DEMNA cabinet kit, required with DEMNA-M.
DEMFA-AA DEC FDDIcontroller 400, XMI to FDDI adapter; requires one XMI slot. Total four per XMI
slsmaximum seven per system. Includes cabinet kit.
Local and Wide Area Communications Servers
Each communications server requires an 802.3/Ethernet connection. Depending on the server selected, either a ThinWire
BNC-type connection, e.g., BC16M cable or thick wire 15-pin AUI transceiver cable, e.g., BNE3x is required. Additional
items are also required—see the Network Products Guide.
DECserver 90M, 90L+, 90TL, 900TM, 700 and MUXserver 90, 320, 380 Communications and Printer Servers
Select a terminal or printer server to provide users with multiple session access to systems on a LAN, to minimize cabling
complexity and costs, and to conserve host resources such as backplane slots.
DEC WANrouter 90, 250; DECBrouter 90; and DECnis 500, 600 Multiprotocol Routers
Select a router to cost effectively link a LAN to a remote system or another LAN and to offload routing overhead from the
application host system.
Network Connectivity Products
See the Network Products Guide for details.