Furman PS-8R II User manual
PS-8R II - POWER CONDITIONER / SEQUENCER
PS-8R II - POWER CONDITIONER / SEQUENCER
INTRODUCTION
The Series II power conditioners feature
Furman’s revolutionary Series Multi-Stage
Protection Plus (SMP+) circuit, as well as our
exclusive Linear Filtering Technology (LiFT).
Together, these technologies comprise what is,
without question, the world's most advanced
and comprehensive transient voltage surge
suppressor / conditioner.
SMP+ (Series Multi-Stage Protection
Plus)
Furman’s SMP+ surge suppression virtually
eliminates service calls. Traditional surge sup-
exposed to multiple transient voltage spikes,
requiring the dismantling of your system, and
repair of your surge suppressor. With Furman’s
SMP+, however, damaging transient voltages
are safely absorbed, clamped, and dissipated.
Unique to Furman’s SMP+ is its unparalleled
clamping voltage. While other designs offer
clamping voltages that are well above 330 Vpk,
SMP+ clamps at 188 Vpk, (133 VAC RMS).
This unprecedented level of protection is only
available with Furman’s SMP+ technology.
Additionally, Furman’s trusted over-voltage cir-
cuitry protects against all too frequent acciden-
tal connections to 208 or 240 VAC, by shutting
off the incoming power until the over voltage
condition is corrected.
[For E versions: Furman’s SMP+ clamps at 376
VpK, (266 VAC RMS.)]
FEATURES
• SMP+ (Series Multi-Stage Protection
— the most comprehensive protection
available anywhere!
• LiFT (Linear Filtering Technology)
with zero ground contamination
• Extreme Voltage Shutdown
• BNC connector on the rear panel
allows for attachment of a goose-
neck lamp to illuminate the rear of
your rack (models GN-I, GN-LED)
•Power-up in three delayed outlet
groups
•Power-down reverses sequence
•Power Status LED’s indicate which
outlet groups have power
•Rated 15 amps
•Remote option allows turn-on and
turn-off at a distance simply by con-
necting a momentary or maintained-
contact switch (and LED if desired)
•
Momentary. (See page 5)
•Multiple units may be linked to handle
higher currents and/or more than three
delay groups
•Three pairs of switched outlets on rear
panel
• Three non-delayed switched outlets
(one front, two rear)
•Circuit breaker
•Ten foot heavy duty A.C. cord
•Three year limited warranty
1
PS-8R II - POWER CONDITIONER / SEQUENCER
LIFT (linear filtering
technology)
designed for unrealistic laboratory conditions.
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
leakage to ground.
DESCRIPTION
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
any power amps are turned on, because simul-
taneous powering would result in a loud, annoy-
speakers. In any large system whose components
present an inductive load to the AC line (including
electric motors, power supplies, and power ampli-
excessive inrush currents that cause circuit break-
ers to trip even though the steady-state currents
are not excessive.
POWER
SEQUENCING
FEATURES
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
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
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.
The overall capacity of the PS-8R II is 15 amps.
This refers to the combined steady-state current
drawn by all devices plugged into all of its nine
2
PS-8R II - POWER CONDITIONER / SEQUENCER
outlets. If this combined current level exceeds
15 amps at any time, the circuit breaker will trip,
cutting off power to your rack. If this occurs, you
must reduce the load by unplugging one or more
units from the PS-8R II. Then push the button on
the circuit breaker (on the front panel) down and
in to reset it.
Although 15 amps is an absolute limit, the PS-8R
II’s power sequencing capability will allow you to
come as close as possible to using the full 15
amps, because the risk of tripping the breaker
is greatly reduced. This is because the PS-8R 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.
ADJUSTING THE DELAY INTERVAL
The delay interval (the time between the turn-on
or turn-off of outlets 1 and 2, or 2 and 3 — not
1 and 3) is factory preset at approximately 5
seconds. It is possible to lengthen or shorten the
delay interval by making an internal adjustment
to the PS-8R II. However, due to the risk of
electric shock, this procedure should only be
done by a qualied technician.
Unplug the PS-8R II and remove its top cover by
unscrewing the 10 top panel screws that secure it.
The delay adjustment is Trimpot VR1, located on
the printed circuit board near the front left corner.
It is the only trimpot on the board. It is equipped
with a thumbwheel for easy adjustment. The
range of adjustment of the delay interval is from
a minimum of about 1 second to a maximum of
about 7 seconds.
220/240V VERSION
The model PS-8R II E is intended for use in
countries with nominal 220 to 240 volt AC lines.
It is identical to the PS-8R II except the rear panel
outlets are the internationally-accepted IEC-320
connectors. It is rated at 10 amps.
OTHER FEATURES
On/Off Rocker Switch:
This 15 amp capacity main power switch is spe-
high inrush current demands of many Power
-
tion. (E-versions feature 10 amp capacity)
Extreme Voltage Shutdown Indicator:
This LED is normally off. It monitors a
hazard common in the entertainment indus-
BNC Connector
for rear light
(models GN-I or
GN-LED)
switched outlets
3
PS-8R II - POWER CONDITIONER / SEQUENCER
try: wiring faults – for example, accidental
connection to 220VAC where 120VAC is
expected, or an open neutral from a 208
or 240VAC feed. The Series II SMP+ cir-
cuit senses voltages that are so high that
operation would be impossible and shuts
the power down before damage can occur.
Upon initially applying power to these units,
the Extreme Voltage indicator LED will light
if the input voltage is above the extreme
voltage cutoff, and power will not be applied
to the unit’s outlets. If the unit has been op-
erating with an acceptable input voltage and
subsequently that voltage exceeds 135V,
it will shut off power to the outlet and the
Extreme Voltage LED will light. (E version:
over voltage shut down is 275 ±5 VAC and
guards against open neutral and accidental
connection to 300+ VAC)
Protection OK Indicator:
Although the Furman SMP+ circuit assures
protection from transient voltage spikes and
surges, nature has a way of occasionally
creating electrical forces that are beyond the
capabilities of any TVSS device to absorb
without some degree of damage. In the
rare instance that this occurs, the green
your front panel will dim. If this happens,
some level of protection from voltage surges
will remain, but the Furman’s clamping
voltage rating will be compromised. The unit
must be returned to Furman Sound, or an
authorized Furman service center for repair.
NOTE: If the mains power is above the high
cutoff voltage and has caused the unit to re-
move power from its outlets, it cannot restore
power without the operator manually turning the
unit off, then on again. Avoid turning the unit
problem, and perhaps changing the AC source.
All Series II units feature a rear rack BNC
socket which will accept any 12 VAC (0.5A)
gooseneck lamp assembly, (such as the Fur-
man GN-LED or GN-I). Simply slide the BNC
plug over the socket and rotate clockwise until
the connector snaps into the locked position.
The rear rack lamp can be powered on or off
with the rear light power switch located on the
far left of the front panel. The Series II’s front
Furman service personnel.
REMOTE SWITCHING
(PS-8R II & PS-8R II E)
and an SPST switch are needed to initiate remote
ON or OFF sequence. The switch may be either
a momentary or maintained-contact type. If a
third & fourth wire are used, an LED may also be
installed at the remote end to indicate that the
power is on.
MAINTAINED VS. MOMENTARY
CONTACT SWITCHING
Maintained switches, such as most toggle
switches and push-on/push-off switches (including
the Furman RS-1), stay open until switched and
then remain closed until switched again.
Momentary switches, usually pushbutton types
like the Furman RS-2, are normally open and stay
closed only as long as the button is pressed. An
on-off switch of either kind may be used to actuate
the PS-8R II’s remote operation.
Maintained switches are generally most convenient
when there is only one remote location. When
more than one switch location is required,
momentary switches allow the sequence to be
started from different locations.
PS-8R II main circuit board has 5 pairs of terminals
(PCB REV F and later) labeled as:
4
PS-8R II - POWER CONDITIONER / SEQUENCER
DEFAULT ), when
the REM and +12V terminals are tied together,
the PS-8R II will sequence OFF.
JMP2 (MOMENTARY), when the REM and +12V
terminals are momentary tied together, the PS-8R
II will sequence ON or OFF.
+12V terminals are tied together, the PS-8R II will
sequence ON.
GND terminals are tied together, the PS-8R II will
sequence ON (Note: JMP1 must have a jumper
installed).
JMP5, spare jumper holder.
The PS-8R II unit comes factory-set for maintained
operation (jumper is installed on JMP1). It may be
easily converted to other operations by moving
jumper plug/plugs on the PS-8R II’s circuit
board.
To do this:
1. Disconnect the unit from AC power.
2. Remove the 10 top cover screws that secure
the top cover.
3. In the rear left corner of the circuit board you
Install the jumper plug on the terminal for the
mode of operation desired.
4. Reattach the top cover.
MAINTAINED MODE
There are three maintained modes of operation:
REM to +12V = OFF (jumper installed on
JMP1)
Connection of the REM terminal to the +12V
terminal initiates an OFF sequence. Disconnecting
initiates an ON sequence. If the cable run is long,
it is recommended that the REM wire be tied to
the PS-8R II’s GND terminal during ON operation
use of a third conductor and a double-throw
switch.
REM to +12V = ON (jumper plug installed on
JMP3)
Connection of the REM terminal to the +12V
terminal initiates an ON sequence. Disconnecting
initiates an OFF sequence. If the cable run is long,
it is recommended that the REM wire be tied to
the PS-8R II’s GND terminal during OFF operation
REM to GND = ON (jumper plugs installed on
JMP1 and JMP4)
Connection of the REM terminal to the GND
terminal initiates an ON sequence. Disconnecting
initiates an OFF sequence.
NOTE: In Maintained Mode, DO NOT USE
on the front panel. Doing so may activate an
unintended sequence. If a Furman RS-1 is the
controlling switch, contact Furman’s Tech Support
department for the proper wiring diagrams.
5
CLASS 1
WIRING
+12V
STATUS
REM
GND
OPTIONAL
STATUS
LED
OFF
ON
JMP
REM TO +12V = OFF
MOMENTARY MODE
REM TO +12V = ON
REM TO GND = ON
1 2 3 4
JUMPER SETTING CHART
PS-8R II - POWER CONDITIONER / SEQUENCER
MOMENTARY MODE
(JUMPER PLUG INSTALLED ON JMP2).
momentary signal from the remote switch to
change its state from ON to OFF or OFF to ON.
the unit will be OFF even if the front panel on/off
rocker switch is ON. It will stay off until sequenced
on by a momentary connection of the REM
terminal to +12V terminal. The sequence starts
on the rising edge of the signal.
The front panel START ON-OFF SEQUENCE
switch is in parallel with, and functionally
equivalent to, one or more remote momentary
switches connected to the barrier strip in the rear.
on/off rocker switch. This means that even if
the unit is sequenced OFF by the rocker switch
on the front panel, when the rocker switch is
turned back on the unit will sequence back on
—it will not be necessary to push the START
ON-OFF SEQUENCE button again. The unit will
lost, at which time it will default back to OFF.
The front panel rocker is not the primary means of
control in momentary mode and should normally
be left ON. It may be a useful secondary means of
control in the rare case where several PS-8R II’s
are in parallel and there is some reason to shut
down one unit without affecting the others.
Because it is a maintained-contact switch, the
RS-1 is not an appropriate remote switch for
the PS-8R II when it is in momentary mode. The
momentary-contact RS-2 would be the correct
choice.
MULTIPLE UNITS
More than one PS-8R II can be used to manage
loads that exceed 15 amps. The power input
for each PS-8R II should come from a separate
15 amp AC circuit. To control multiple PS-8R
II’s remotely with one or more remote switches,
connect the REM, +12V, and GND terminals of all
units together. Be sure that the mode (momentary
or maintained) of each unit is set the same.
Connect a single maintained switch or one or
more momentary switches to the nearest PS-8R
II, as discussed above. If you are unsure whether
your building’s wiring can accommodate multiple
fully-loaded PS-8R II’s or PS-8R II E’s, consult a
If multiple PS-8R II’s are controlled by one or more
momentary remote switches, they will all change
state (from ON to OFF or vice versa) on each
rising edge of the voltage on the REM terminal.
All remote switches or grey pushbuttons on any
unit’s front panel will toggle all of the units ON.
The rocker switch on each unit’s front panel will
turn OFF any individual unit currently ON without
affecting the other units.
To address the unusual (hopefully rare) instance
when several PS-8R II’s in parallel fall out of sync,
resulting in some units turning ON and others
turning OFF when a remote button is pushed, the
remote signal line has a special feature:
Holding the REM line high for at least 4 seconds
(whether by an actual remote switch or by any
unit’s front panel switch) will force all units to the
OFF state, putting them back in sync. This is the
only way to re-sync units other than disconnecting
AC power to all the units. Remember — operating
6
CLASS 1
WIRING
+12V
STATUS
REM
GND
OPTIONAL
STATUS
LED
PS-8R II - POWER CONDITIONER / SEQUENCER
the front panel rocker switch does NOT affect
the stored state of the unit, even though it does
temporarily turn the outputs OFF.
STATUS TERMINAL
The STATUS terminal is an output that may be
used to illuminate an LED at the remote location
to indicate that power is available at the PS-8R
II’s outlets. If it is high (+12V), the unit is ON (or
at least in the process of sequencing ON); if it is
low, the unit is OFF (or sequencing OFF). Simply
connect the indicator LED between STATUS
and GND (do not use a series resistor). If the
LED does not light when the switch is in the ON
position, check the polarity and reverse the LED
leads (if needed).
BLINKING DELAY 1 INDICATOR
In Maintained Mode, the DELAY 1 LED on the PS-
8R II blinks whenever the unit is OFF (the remote
switch is in the OFF position).In Momentary Mode,
the LED blinks if the "memorized" state is OFF.
7
THREE YEAR
LIMITED WARRANTY
Furman Sound, LLC., having its principal place
of business at 1690 Corporate Circle, Petaluma,
as follows:
Manufacturer warrants to the original Purchaser
of the Product that the Product sold hereunder
will be free from defects in material and workman-
ship for a period of three years from the date of
purchase. The Purchaser of the product is allowed
warranty registration by mail or on-line at the Fur-
man website. If the Product does not conform to
this Limited Warranty during the warranty period
Manufacturer in writing of the claimed defects.
If the defects are of such type and nature as to
be covered by this warranty, Manufacturer shall
authorize Purchaser to return the Product to the
Furman factory or to an authorized Furman repair
location. Warranty claims should be accompanied
by a copy of the original purchase invoice show-
ing the purchase date; this is not necessary if the
Warranty Registration was completed either via
the mailed in warranty card or on-line website reg-
istration. Shipping charges to the Furman factory
or to an authorized repair location must be prepaid
by the Purchaser of the product. Manufacturer
shall, at its own expense, furnish a replacement
Product or, at Manufacturer’s option, repair the
defective Product. Return shipping charges back
to Purchaser will be paid by Manufacturer.
THE FOREGOING IS IN LIEU OF ALL OTHER
-
CLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE.
Manufacturer does not warrant against damages
or defects arising out of improper or abnormal
use of handling of the Product; against defects
or damages arising from improper installation,
against defects in products or components not
manufactured by Manufacturer, or against dam-
ages resulting from such non-Manufacturer made
products or components. This warranty shall be
cancelable by Manufacturer at its sole discre-
written authorization from Furman Sound. This
warranty also does not apply to Products upon
PS-8R II - POWER CONDITIONER / SEQUENCER
8
SERVICE
Before returning any equipment for repair, please
be sure that it is adequately packed and cush-
ioned against damage in shipment, and that it is
insured. We suggest that you save the original
packaging and use it to ship the product for ser-
vicing. Also, please enclose a note giving your
name, address, phone number and a description
of the problem.
NOTE: All equipment being returned for repair
must have a Return Authorization (RA) Number.
To get an RA Number, please call the Furman
Service Department, (707) 763-1010, Ext. 2370 or
Please display your RA Number prominently on
the front of all packages.
which repairs have been affected or attempted by
persons other than pursuant to written authoriza-
tion by Manufacturer.
and exclusive obligation of Manufacturer shall
be to repair or replace the defective Product in
the manner and for the period provided above.
Manufacturer shall not have any other obligation
with respect to the Products or any part thereof,
whether based on contract, tort, strict liability or
otherwise. Under no circumstances, whether
based on this Limited Warranty or otherwise,
shall Manufacturer be liable for incidental, spe-
cial, or consequential damages. Manufacturer’s
employees or representatives’ ORAL OR OTHER
WRITTEN STATEMENTS DO NOT CONSTI-
TUTE WARRANTIES, shall not be relied upon by
Purchaser, and are not a part of the contract for
sale or this limited warranty. This Limited Warranty
states the entire obligation of Manufacturer with
respect to the Product. If any part of this Limited
Warranty is determined to be void or illegal, the
remainder shall remain in full force and effect.
PS-8R II - POWER CONDITIONER / SEQUENCER
PS-REL AC Relay
MP
15A, 20A, 30A Power Relays. RS-1 and RS-2
Remote System Control Panels
RELATED PRODUCTS
The PS-8R II, along with other Furman AC power accessories, can be an integral part of a complete
AC power control system.
Other Furman Sequencer products:
- PS-PRO II
- PowerLink
- ASD-120
- PowerPort
- MP-15, MP-20Q
PS-8R II - POWER CONDITIONER / SEQUENCER
Maximum Load:
PS-8R II: 15 amps (1800 watts at 120 VAC)
PS-8R IIE: 10 amps (2300 watts at 230 VAC)
Operating Voltage:
Over Voltage Shutdown:
140 VAC typically
typically)
Delay Interval:
5 seconds (adjustable with internal trimpot)
Remote Switch:
Momentary or maintained action.
Remote Terminal:
Screw terminals or Eurostyle pluggable
Terminal Block, 2 for switch, 2 additional for
optional LED (22 ga. wiring minimum).
Spike Protection Modes:
Line to neutral, zero ground leakage
Spike Clamping Voltage:
188 Vpk @ 3,000 amps, (133 VAC RMS)
Response Time:
1 nanosecond
Maximum Surge Current:
6,500 amps
Dimensions:
Weight:
12 lbs.
Construction:
ized aluminum front panel; glass epoxy printed
circuit boards
Power Consumption:
11 watts
Optional:
are intended for use in countries with nominal
220 to 240 volt AC mains. Their rear panel out-
lets use internationally accepted IEC-320 con-
nectors.
Safety Agency Approvals: NRTL-C, TUV, CE listed.
PS-8R II SPECIFICATIONS
SPECIFICATIONS
PS-8R II - POWER CONDITIONER / SEQUENCER
Furman Sound, LLC.
1690 Corporate Circle
Petaluma, California 94954-6919 USA
Phone: 707-763-1010 Fax: 707-763-1310
Web: www.FurmanSound.com
E-mail: [email protected]
070802-D
This manual suits for next models
1
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