Furman Sound PS-PRO II - Manual (Page 4)

P S - P R O 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
front panel Delay Adjust control.
The Delay Adjust control, which can be set us-
ing a screwdriver, controls the total delay time
between Delay 2 and Delay 3. For example, if
the Delay Adjust is set for 30 seconds, the De-
lay 1 outlets will go on immediately, Delay 2 will
power 15 seconds later and Delay 3 will power
15 seconds after Delay 2, for a total delay time
of 30 seconds.
The order is reversed for the OFF sequence.
For example, when an OFF sequence is initiated
and the Delay Adjust control is set at 60 seconds,
Delay 3 outlets lose power immediately, Delay 2
outlets lose power 30 seconds later and Delay
1 outlets lose power 30 seconds after Delay 2.
The total delay time is 60 seconds.
In the event of a power outage, of course all
equipment plugged into a PS-PRO II will lose
power simultaneously. However, when power
is restored, the delayed outlet groups will again
turn on in the usual delayed sequence (if set to
maintained on mode).
ON or OFF
SE qu EN CIN g
The method of initiating an ON or OFF sequence
depends on whether the unit is to be controlled
locally or remotely. If remotely, it further
depends on the type of switch or switches used
(momentary or maintained).
LOCAL CONTROL
For local control, an ON sequence is initiated
by turning the key switch to the ON position,
and an OFF sequence by turning the key
switch to OFF position. The START ON-OFF
SEQUENCE pushbutton is not normally used
in local operation.
NOTE: If the PS-PRO II is to be used under
Although 20 amps is an absolute limit, the
PS-PRO II will allow you to come as close as
possible to using the full 20 amps, because
with power sequencing, the risk of tripping
the breaker is greatly reduced. The PS-PRO
II handles large but temporary inrush currents
in stages, rather than simultaneously, allowing
each stage to settle to its steady-state current
draw before the next stage is powered.
Outlets and Plugs: The PS-PRO II’s four rear
panel outlet pairs are standard 120V, 20A duplex
types. These outlets are widely spaced, to ac-
commodate one bulky plug-mounted “wall wart”
power supply in each without covering up an
adjacent outlet. The front panel outlet is limited
to 15 amp use. The PS-PRO II also uses a 20
amp line cord, identified by the perpendicular
blades on the plug. In 20 amp products, use
of a plug of this type is required for UL safety
certification. It is compatible with 20 amp outlets
(such as those on the rear panel of the PS-PRO
II). For more information about 20 amp plugs,
see the information sheet “What Kind Of Plug Is
This, Anyway?” accompanying this manual, or
request a copy from Furman.
POWER
SEquENCINg
FEaTuRES
The PS-PRO II rear panel provides one un-
switched and three switched outlet pairs. The
switched outlet pairs are labeled Delay 1, Delay
2, and Delay 3. (The other pair of outlets on the
rear panel and an additional single outlet on the
front panel are unswitched.)
Here’s how the PS-PRO II works: When an
ON sequence is initiated, power is immediately
applied to the Delay 1 outlets. Power is then
applied to Delay 2 and Delay 3 outlets per the
1-60 second total delay setting selected with the
3