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Optima 520 Series
4 Reference
Standard Features
(1) Main Power breaker and indicator. The breaker will
have a 15, 20, or 30 A maximum-duty rating (de-
rated to 80% for continuous duty). Indicator is amber.
(2) Front-panel Group A outlets. These outlets are
always powered—that is, they are never switched or
sequenced even when those options are included.
(3) Rear-panel Group A outlets. These outlets are
always powered—that is, they are never switched or
sequenced even when those options are included.
(4) Rear panel Group B outlets. These outlets are
controlled by remote switching/EPO
when that
option is included
. Otherwise, they are always
powered like Group A. When the sequencing option
is included, all four Group B outlets are powered
together before Group C outlets.
(5) Rear panel Group C outlets. These outlets are
controlled by remote switching/EPO
when that
option is included
. Otherwise, they are always
powered like Group A. When the sequencing option
is included, all four Group C outlets are powered
together after Group B outlets.
(6) Threaded ground lug.
(7) Power inlet. Most models include a strain-relieved
cable as shown. The plug will vary by model. Some
models include a panel-mounted C20 connector.
(8) Mounting brackets. May be mounted in one of
three locations to yield a “flush,” recessed, or rear-
facing position of the chassis relative to the rack’s
mounting flanges. May also be removed for table top
operation, or adaptation of end user’s own custom
brackets.
Optional Features
(9) Optional power meter can display volts, amperes,
watts, and power factor. When item 9 is included,
item 10 is also included.
(10) Circuit breaker for internal control circuitry. Included
when either the optional meter is included, or
when the optional remote switching/EPO circuit is
included.
(11) Optional Remote Switching/EPO mode switch and
indicator. The remote switching package always
includes items 10, 11, 12, and 13. The three-
position toggle provides manual control over the
remote switching mode. When Local/On, all outlets
are powered, and only remote EPO will have impact.
When Off, Groups B and C outlets are disabled,
and any remote circuit will have no impact. When
Remote, Groups B and C outlets are subject to the
remote/EPO control bus. Group A outlets are always
powered regardless of remote mode. Whenever the
main circuit breaker is On, the Powered indicator is
illuminated to indicate that power is
available
to the
switched outlets.
(12) Optional front panel Remote Switching/EPO control
bus interface. Two connectors allow the PDU to
be daisy chained between a Remote EPO panel
(such as Marway’s UCP) and another PDU, or even
between two PDU’s (when one of the others is
connected to a remote EPO panel). Either connector
can be used for either connection.
(13) Optional rear panel Remote Switching/EPO control
bus interface. This is a third connector provided
for when a rear connection is more convenient. It
always accompanies the remote switching/EPO
option package of items 10, 11, and 12.
Gr
oup A
Powered
Breaker
Outlet Control Bus
Enable
Disable
Return
Optima
Main Breaker
Main Power
On
Switched Outlets
Controls
OFF
ON
PRESS
RESET
Local/On
Off
Remote
VOLTS
AMPS
WATTS
PF
SEL
Gr
oup C
E
D
R
19.00
17.28
1.74
9.00
0.75
1.25
3
13
4
5
6
7
2
1
9
10
11
12
8
Gr
oup A
Gr
oup B
