Furman Sound PS-8 User's Manual
Contents
1. 70 PRONETS FOR ALDER WOED ARD ON FUTER PROFESSIONAL Furman Sound Inc 1997 South McDowell Blvd Petaluma California 94954 6919 USA Phone 707 763 1010 Fax 707 763 1310 www furmansound com E mail info furmansound com Power Sequencer MODELS PS 8 PS 8R PS 8E and PS 8RE Instruction Sheet FUAMAN pee maining PS 8 Features Power up in three delayed outlet groups Power down reverses sequence Triple mode varistor spike and surge suppression RFI filtering with multi stage pi filter Power Status LED s indicate which outlet groups have power Mains Wiring indicators monitor wiring integrity show Normal and five kinds of faults Rated 15 amps Remote option allows turn on and turn off at a distance simply by connecting a momentary or maintained contact switch and LED if desired 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 unswitched outlets one front two rear Circuit breaker Ten foot heavy duty A C cord Three year limited warranty Introduction Congratulations on your purchase of a Furman PS 8 Power Sequencer a well designed reliable and simple to use product that will help you avoid many headaches involved in installing a rack full of complex equipment The PS 8 Power Sequencer is needed whenever various kinds of equipment must be powered up or down in groups rather2. on off switch of either kind may be used to actuate the PS 8 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 any location PS 8R units come factory set for maintained operation They may be easily converted to momentary operation by moving a jumper plug on the PS 8R s circuit board To do this 1 Disconnect the unit from AC power 2 Remove the four screws that secure the top cover 3 In the rear left corner of the circuit board there is an area labeled REMOTE CONTROL There are two pairs of terminals in this area one labeled MAINTAINED and the other MOMENTARY There is a small black jumper linking the MAINTAINED terminals Slide it up and off and replace itsecurely over the MOMENTARY terminals 4 Reattach the top cover Maintained Mode A simple connection of the REM IN terminal to the 12V terminal initiates an OFF sequence Disconnecting it initiates an ON sequence If the cable run is long it is recommended that the REM IN wire be tied to the PS 8R s GND terminal during ON op eration rather than leaving it floating This will require the use of a third conductor and a double throw switch 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 PowerPort s ou
3. than all simultaneously In audio systems sequenced powering is often necessary to allow turn on transients from low level amplifiers and processors to settle down before any power amps are turned on because simultaneous powering would result in a loud annoying and potentially destructive pop reaching the speakers And in any large system whose components present an inductive load to the AC line including electric motors power supplies and power amplifiers of all kinds sequenced powering can avoid excessive inrush currents that cause circuit breakers to trip even though the steady state currents are not excessive 5 9927 n 6 8 s Cou E ae ee PE ness SE 5 SB O bidiyo A ESG Power Sequencing Features Using the PS 8 is a simple and inexpensive way to apply and remove power in a controlled repeatable foolproof 3 step sequence It is ideal when large installations must be switched by inexperienced personnel The PS 8 provides three outlet pairs labeled Delay 1 Delay 2 and Delay 3 that receive power approximately 1 2 5 and 10 seconds respectively after the front panel switch is thrown to ON When thrown 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 the next page The turn on delay intervals are factory preset at these durations but may be altered by means of a
4. S Pacific Time Please display your RA Number prominently on the front of all packages
5. ad by unplugging one or more units from the PS 8 Then push the white button on 960032 1051 Rear Panel Outlets Model PS 8R is shown Model PS 8 is similar except the barrier terminal strip at right is not present 120 VAC CAUTION 60 HZ 15A ol R QUALIFIED SERVICE PERSONNEL TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN AND MOISTURE ON POWER UP This pair of outlets This pair of outlets plus the one on the comes on approx front panel are on 1 2 second after the regardless of the Switch is turned on switch position ON POWER DOWN Same as above This pair of outlets goes off approx 10 seconds after the switch is turned off AVIS DELAY 2 CLASS 1 ELECTRIQUE NE WIRING PAS OUVRIR W REM IN Rez LISTED PROFESSIONAL S 2 AUDIO EQUIPMENT GND This pair of outlets comes on approx 5 seconds after the switch is turned on This pair of outlets comes on approx 10 seconds after the switch is turned on This pair of outlets goes off approx 5 seconds after the switch is turned off This pair of outlets goes off approx 1 2 second after the switch is turned off Note The switch referred to in this chart is either the front panel switch or if used the remote switch connected to the terminal strip of a PS 8R the circuit breaker on the rear panel down and in to reset it Although 15 amps is an absolute limit the PS 8 s power sequencing capabilit
6. all change state from on to off or vice versa on each rising edge of the voltage on the REM IN terminal Any remote switch AND any of the grey pushbuttons on any unit s front panel will toggle all the units The rocker switch on each unit s front panel will turn off any individual unit that is currently on with out affecting the other units The STATUS lines work the same in either mode Each reflects the true state of the outlets of its unit and is affected by both the memorized state and by the front panel rocker switch A separate LED must be used to indicate the status of each PS 8R To take care of the case of having several PS 8R s in parallel that somehow get out of sync such that every time a remote button is pushed some units turn on and others turn off there is a special feature of the remote signal line 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 which will put them back in sync This is the only way to re sync units other than disconnecting AC power to all the units Remember operating the front panel rocker switch does NOT affect the stored state of the unit even though it does temporarily turn the outputs off This section covers the case of multiple units in parallel all sequences initiate simultaneously See AC Relay Accessory PS REL on the following page for a discussion of wiring mult
7. d 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 Versions Units with E Suffix Only Models PS 8E and PS 8RE are intended for use in countries with nominal 220 to 240 volt AC lines They are identical to the PS 8 and PS 8R except their rear panel outlets are the internationally accepted IEC 320 connectors They are rated at 10 amps Remote Switching Units with R Suffix Only Model PS 8R and PS 8RE differ from the corresponding models without the R suffix in the addition of a barrier terminal strip on the rear panel that allows a switch to be connected to turn the unit on and off at a distance and also in the START ON OFF SEQUENCE pushbutton on the front panel In the most basic configuration only two Class 1 wires and an SPST switch are needed to initiate an ON or OFF sequence The switch may be either a momentary or maintained contact type If a third wire is 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 button switches including the Furman RS 1 stay open until thrown then stay closed until thrown 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
8. f one of Furman s AC Line Voltage Regulators in addition to the PS 8 If you do use a voltage regulator run the raw power line into the regulator first so that the PS 8 receives a stabilized voltage to distribute Mains Wiring Fault Analyzer The PS 8 also assists in analyzing any faults that may occur in the AC mains wiring Two green and one red neon indicators light in a specific pattern for normal wiring and in different patterns for various faults When the AC wiring is correct both green indicators will be lit but not the red indicator If any other pattern of indicators is lit a fault is present The chart next to the indicators identifies its exact nature Since any wiring fault presents a potentially serious safety hazard the assistance of a qualified electrician should be obtained in correcting the problem 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 8 However due to the risk of electric shock this procedure should only be done by a qualified technician Unplug the PS 8 and remove its top cover by unscrewing the four 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 equippe
9. iple units in series Momentary mode switching is not available in PS 8R s with serial numbers below H12757 AC Relay Accessory PS REL The AC Relay Accessory model PS REL is a sensor which can close a switch in response to the presence of AC power while only drawing a minimal amount of that power It is necessary whenever a PS 8R must be turned on in response to energizing a switched outlet where that outlet is rated less than 15 amps or is not grounded This occurs frequently in home theater installations when a small ungrounded switched outlet on a preamp or receiver often activated by a wireless remote device is to be used to power up a large amount of equipment The AC Relay Accessory may also be used to allow a PS 8R to be hooked up in series to a PS 8 or another PS 8R to double the number of delayed turn on turn off groups by having the relay sense the presence of power at the DELAY 3 outlet of the PS 8 The PS REL is simply a small box containing a relay A two prong AC plug on a 6 foot cord activates the relay and two wires ending in terminals connect to the relay contacts These two wires should be connected to the 12V and REM IN screw terminals of the PS 8R with the PS RELs AC plug in the outlet to be sensed The PS 8R itself should be plugged into a separate 15 amp electrical circuit When AC power appears at the sensed outlet the PS 8R will begin its turn on sequence and will be able to sup ply its full ra
10. lity under this warranty is limited to repair or replacement of the defective unit Furman will not be responsible for incidental or consequential damages resulting from the use or misuse of its products Some states do not allow the exclusion of incidental or consequential damages so the above limitations may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state When returning any equipment for repair please be sure that it is adequately packed and cushioned against damage in shipment and that it is insured Warranty claims should be accompanied by a copy of the Originalpurchase invoice showing the purchase date if a Warranty Registration Card was mailed in at the time of purchase this is not neces sary Also please enclose a note giving your name address phone number and a description of the problem Service Before returning any equipment for repair please be sure that it is adequately packed and cushioned 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 servicing 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 40 between 8 a m and 5 p m U
11. n internal trimpot adjustment see Adjusting the Delay Intervals below for details In addition to the delayed outlets a single front panel outlet and a rear panel pair are unswitched Power is available at the unswitched outlets regardless of the position of the front panel or remote switch All rear panel outlets are standard 120V 15A duplex types Isolated ground Super Spec outlets are available by special order In the event of a power out of course all equipment plugged into a PS 8 will lose power simultaneously 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 equip ment 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 unswitched outlets We suggest keeping the front panel unswitched outlet free for equipment that is only in use temporarily The overall capacity of the PS 8 is 15 amps This refers to the combined steady state current drawn by all devices plugged into all of its nine 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 lo
12. oules total protection E versions 130 joules L N 160 joules N G L G 450 joules total Noise Attenuation PS 8 and PS 8R Transverse and common modes 20 dB at 200 kHz rising to gt 40 dB 1 to 100 MHz Mechanical Dimensions 1 75 H x 19 W x 8 D Weight 6 Ibs 2 7 kg Construction Steel chassis zinc chromate plating 125 brushed and black anodized aluminum front panel 3 oz copper double sided glass epoxy printed circuit board Power Consumption Switch off 6 watts Switch on 8 5 watts Safety Agency Approvals UL CUL CE listed LISTED The Furman PS 8 is manufactured in the U S A 7237 Three Year Limited Warranty The Furman PS 8 PS 8E PS 8R and PS 8RE are warranted against failures due to defective parts or faulty workmanship for a period of three years after delivery to the original owner During this period Furman will make any necessary repairs without charge for parts or labor Shipping charges to the factory or repair station must be prepaid by the owner return shipping charges via UPS Ground will be paid by Furman This warranty applies only to the original owner and is not transferable Also it does not apply to repairs done other than by the Furman factory or its Authorized Repair Stations This warranty may be cancelled by Furman at its sole discretion if the unit has been subjected to physical abuse or has been modified in any way without written authorization from Furman Furman s liabi
13. 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 remembers its state until the incoming power is lost which would then 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 of having several PS 8R s in parallel if 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 when it is in momentary mode The momentary contact RS 2 would be the correct choice Multiple Units You can use more than one PS 8R to handle loads that ex ceed 15 amps The power input for each PS 8R should come from a separate 15 amp AC circuit To control PS 8R s remotely with one or more remote switches connect the REM IN 12V and optionally GND terminals of all units together Be sure that the mode momentary or maintained of all units is set the same Con nect a single maintained switch or one or more momentary Switches to the nearest PS 8R as discussed above If you are unsure whether your building wiring can accommodate multiple fully loaded PS 8 s or PS 8R s consult a qualified electrician If multiple PS 8R s are controlled by one or more momentary remote switches they will
14. ted 15 amps Blinking DELAY 1 Indicator The DELAY 1 LED on a PS 8R blinks whenever the unit is OFF due to the remote switch In Maintained Mode this will only occur when the REM IN terminal is tied to 12V In Momentary Mode the LED blinks if the memorized state is OFF Related Products The PS 8R along with other Furman AC power accessories can be an integral part of a complete AC power control system Visit our website or contact us we ll send you our AC Power System Application Suggestions brochure and Furman s new color catalog RS 1 REMOTE CONTROL PANEL MiniPort PS REL AC Relay RS 1 and RS 2 Power Relays Remote System 15A 20A 30A Control Panels PS 8 PS 8R SPECIFICATIONS PS 8 15 amps 1800 watts at 120 VAC PS 8E 10 amps 2300 watts at 230 VAC Input Voltage Range PS 8 85 to 135 VAC PS 8E 190 to 270 VAC Mains Wiring Analyzer Detects 1 normal mode and 5 fault modes Maximum load Delay Interval 5 seconds adjustable with internal trimpot Remote Switch Momentary or maintained action PS 8R only Screw terminals 3 for switch 1 additional for optional LED 22 ga wiring minimum Spike Protection Modes Line to neutral neutral to ground line to ground Spike Clamping Voltage PS 8 TVSS rating 400V peak L N N G L G tested to UL 1449 PS 8E 500V peak Response Time 1 nanosecond Maximum Surge Current 6 500 amps 8 x 20 ms pulse Maximum Spike Energy 80 joules per mode 240 j
15. tlets If it is high 5V the unit is ON or at least in the process of sequencing ON if low the unit is OFF or sequencing OFF Simply connect the indicator LED between STATUS and ground 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 it is wrong If a Furman RS 1 is the controlling switch contact Furman s Tech Support de partment for the proper wiring diagrams In Maintained Mode DO NOT USE the START ON OFF SE QUENCE switch on the front panel If you do you may activate an unintended partial turn off sequence Momentary Mode In Momentary Mode the PS 8R has memory it only needs a momentary signal from the remote switch to change its state from ON to OFF When first plugged in or after power is lost and reapplied for any reason the memory state is OFF This means 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 IN terminal to 12V The sequence starts on the rising edge of the signal The front panel START ON OFF SEQUENCE switch is in par allel with and functionally equivalent to one or more remote mo mentary switches connected to the barrier strip in the rear The memory is independent of the front panel on off rocker switch This means that even if the unit is sequenced OFF by the rocker switch on the front
16. y 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 8 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 Power Conditioning Features The PS 8 offers all basic power conditioning features besides its sequencing capability It provides varistor spike and surge protection across all three modes line to neutral line to ground and neutral to ground responding in nanoseconds to clamp excessive transient voltages to safe levels There is also a sophisticated multi stage filter for blocking radio frequency line noise The filter works to prevent noise from fluorescent lights certain dimmers radio transmitters and similar sources of electronic pollution from leaking from the AC line into sensitive audio video or computer circuits Clean filtered power is provided at all 9 outlets even the unswitched ones Despite its many protective features you should be aware that the PS 8 does not compensate if the AC line voltage itself is high or low i e it does not compensate for brownout conditions If you frequently move your rack to different locations derive power from generators use long extension cords travel internationally or are in an area particularly prone to brownouts you may benefit from the use o
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