Digital Equipment RW504-ZA, Service Manual

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Table 3–2 (Cont.) Rear Panel Features and Controls
#
Power switch Used to switch on or off all power to the optical disk
library. (This switch must be on before the operation
switch on the front panel is functional.)
$
Voltage select switch The voltage select switch allows the user to specify
either a 115-volt or a 230-volt setting depending on
the country in which the disk library will be used.
UPS (9-pin, serial)
Connector Used to connect a communication cable between the
optical disk library and an uninterruptable power
supply (UPS). A UPS insures that data in the buffer
during a write operation will not be lost in the event
of a power failure.
Fuse receptacle The fuse receptacle holds the fuse and fuseholder cap.
3–4 Product Operation and Configuration