Furman PS8 R II Owner's Manual page 3

P S - 8 R I I - P O W E R C O N D I T I O N E R / S E q u E N C E R
l I f t (
l i n e a r f i lt e r i n g
t e c h n o l o g y
Traditional AC filter - conditioners have been
designed for unrealistic laboratory conditions.
Prior technologies, whether multiple pole filter
or conventional series mode, could actually
harm audio and video performance more than
they help, due to the resonant peaking of their
antiquated, non-linear designs. under certain
conditions, these designs can actually add
more than 10 dB of noise to the incoming AC
line! Worse still, lost digital data, the need to
re-boot digital pre-sets, or destroyed digital
converters are frequently caused by excessive
voltage spikes and AC noise contaminating
the equipment ground. Furman's SMP+ with
LiFT takes another approach, ensuring optimal
performance through linear filtering and no
leakage to ground.
d e s c r I p t I o n
The PS-8R II Power Sequencer is needed
when equipment must be powered up or down
in groups, rather than simultaneously. In audio
systems, sequenced powering is often nec-
essary to allow turn-on transients from low level
amplifiers and processors to settle down before
any power amps are turned on, because simul-
taneous powering would result in a loud, annoy-
ing, and potentially destructive "pop" to reach the
speakers. In any large system whose components
present an inductive load to the AC line (including
electric motors, power supplies, and power ampli-
fiers of all kinds), sequenced powering can avoid
excessive inrush currents that cause circuit break-
ers to trip even though the steady-state currents
are not excessive.
)
p o w e r
s e q u e n c I n g
f e at u r e s
The PS-8R II is a simple and inexpensive way
to apply and remove power in a controlled, re-
peatable, fool-proof 3-step sequence. It is ideal
when large installations must be switched by
inexperienced personnel.
The PS-8R II provides three outlet pairs labeled
Delay 1, Delay 2, and Delay 3, that receive power
approximately 1/2, 5, and 10 seconds, respec-
tively, after the front panel sequence switch is
switched to "ON." When switched to "OFF," the
sequence is reversed, with Delay 3 losing power
after approximately 1/2 second, Delay 2 after 5
seconds, and Delay 1 after 10 seconds. See the
rear panel illustration on page 3. The turn-on de-
lay intervals are factory preset at these durations,
but may be altered by means of an internal trimpot
adjustment (see "Adjusting the Delay Intervals"
for details). In addition to the delayed outlets, a
single front panel outlet and a rear panel pair are
powered through the main power on/off switch.
All rear panel outlets are standard 120V, 15A
duplex types.
In the event of a power outage, all equipment
plugged into a PS-8R II will lose power simulta-
neously. However, when power is restored, the
delayed outlet groups will again turn on in the
usual delayed sequence.
We recommend that power amps receive power
last — plug them all into Delay 3 or divide them
into two groups and plug one group into Delay 2
and the other into Delay 3. Low level equipment
such as mixers and signal processors should
use Delay 1.
Equipment incorporating clocks or timers such
as VCR's, or equipment that must respond
to wireless remote actuation should use the
2