4
Cables, Connectors, and Auxiliary PCBs
Chapter 4 describes and identifies the connectors and cables in the DECmpp
12000/Sx system. It also describes PCBs that are not mounted in the data
parallel unit (DPU) card cages.
4.1 Cables and Connectors
DECmpp 12000 systems require a 30 A, 250 V twist lock connector on a dedicated
circuit in the United States. Systems shipped outside the United States require
a 30 A, 220 Vac circuit and may be fitted with local cables and/or connectors
during installation. The DECmpp 12000/Sx Hardware Installation Guide lists
all optional power cable part numbers.
DECmpp 12000–LC systems must connect to either a dedicated 15 A, 110 Vac
circuit or to a dedicated 10 A, 220 Vac or 240 Vac circuit, depending on local
power availability.
Following are brief descriptions of cables and connectors for the front-end server
and the DPU. Refer to Figure 4–1 for a simplified diagram of the DECmpp
system internal and external cable connections. The internal cables are used on
the DECmpp 12000–LC configuration only.
•
Telephone Connection — Internal DPU 2-foot cable to the modem; external
cable length determined by installation site requirements (United States
only).
•
Data Cables
Internal 4 foot cable with 100-pin connectors between the Front-end VME
interface PCB (T6000) in the DPU card cage and the DPU rear panel
interconnect PCB.
External 15 foot cable with 100-pin connectors between the DPU rear panel
cable connection and the server rear panel connection.
•
Internal RS-232 Cable — Between the modem and the DPU rear panel
interconnect PCB.
•
External RS-232 Cable — Between the server rear panel and the DPU rear
panel cable connection.
•
Power Cable — In DECmpp 12000 systems, the power cable is wired directly
to a terminal block inside the DPU power supply. DECmpp 12000–LC
systems use a standard power cable.
Cables, Connectors, and Auxiliary PCBs 4–1
