PS-PRO - POWER CONDITIONER/SEQUENCER PS-PRO - POWER CONDITIONER/SEQUENCER Congratulations on your purchase of a Furman PS-PRO Power Conditioner/Sequencer. The PS-PRO is one of Furman's top-of-the-line PRO Series, offering maximum protection from the AC line hazards faced by delicate analog and digital pro audio and video F E AT U R E S l 20 amp (2400 watt) rating handles even the largest amps Multiple levels of protection components can safely absorb large voltage spikes and provide highly effective RF filtering -- the most comprehensive protection available anywhere! Extreme Voltage Shutdown guards against catastrophically wrong voltages Power Status LED's indicate which outlet groups have power Mains Wiring indicators monitor wiring integrity, show Normal and five kinds of faults Remote operation 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 Six switched outlets (on rear panel), and three unswitched outlets (one front, two rear) Ten foot 12 AWG heavy duty power cord l l l l The PS-PRO is a power sequencer, meaning it is capable of powering a rack full of equipment in three steps separated by timed delays. It is useful whenever various kinds of equipment must be powered up or down in groups, rather 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 can cause circuit breakers to trip even though the steady-state currents are not excessive. Power sequencing is particularly suited to applications where large installations must be switched by inexperienced personnel. The PS-PRO is controlled by a front panel key-operated switch to provide security from non-authorized users tampering with the system. The switch has three positions: OFF, ON, and REM, allowing for local or remote control. With remote control, one or more PS-PRO's may be installed in remote locations with on/off control and LED monitoring via low-voltage control wires. Besides its power sequencing capabilities, the PSPRO contains many other conditioning and protection features. Both aspects of its functioning will be discussed in the next sections. l l l l l Three year limited warranty I N S TA L L AT I O N 1 DESCRIPTION PS-PRO - POWER CONDITIONER/SEQUENCER R E CO M M E N DAT I O N S In audio/video installations, we recommend that power amps receive power last -- plug them all into Delay 3 or divide them into two groups and plug one group through Delay 2 and the other through 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 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-PRO is 20 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 20 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-PRO. Then push the white button on the circuit breaker (on the front panel) in to reset it. Although 20 amps is an absolute limit, the PS-PRO 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. This is because the PS-PRO 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's four rear panel outlet pairs are standard 120V, 20A duplex types. These outlets are widely spaced, to accommodate 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 also uses a 20 amp line cord, which can be recognized 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 the ones on the PS-PRO's rear panel.) For more information about 20 amp plugs, see the information sheet "What Kind Of Plug Is This, Anyway?" that accompanied this manual, or request a copy from Furman. POWER SEQUENCING F E AT U R E S The PS-PRO rear panel provides one unswitched outlet pair 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 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 you choose with the front panel Delay Adjust control. The screwdriver-settable Delay Adjust controls the total delay time between the Delay 2 and Delay 3 outlets. For example, if the Delay Adjust control is set to 30 seconds, Delay 1 outlets will go on immediately, Delay 2 outlets will receive power 15 seconds after Delay 1 outlets, and Delay 3 outlets will receive power 15 seconds after Delay 2 outlets. Therefore the total delay time is 30 seconds. The order is reversed on an 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 the Delay 2 outlets have been shut off. The total delay time is 60 seconds. In the event of a power out, of course all equipment plugged into a PS-PRO 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). 2 PS-PRO - POWER CONDITIONER/SEQUENCER POWER CO N D I T I O N I N G F E AT U R E S The PS-PRO provides a very high degree of power conditioning protection for your expensive and delicate equipment. What sets Furman's top-of-theline PRO-level protection apart from that offered by other conditioners is the quantity, quality, and configuration of its suppression devices. These include MOV's, gas discharge tubes, fast-blow fuses, and high voltage inductors and capacitors. This unique combination can safely absorb and dissipate large spikes from nearby lightning strikes and other sources (up to 11,000 amps across any wiring mode -- line-neutral, line-ground, or neutral-ground), as well as highly attenuate audible high frequency noise. Clean, filtered power is provided at all 9 outlets, even the unswitched ones. The PS-PRO also includes special circuitry to detect additional wiring faults, with several front panel LED status indicators. The PS-PRO will even keep itself from turning on, or will shut down under extreme conditions, if the voltage falls below 80 volts or rises above 140 volts. This feature is called "Extreme Voltage Shutdown." It is particularly valuable in the entertainment industry, where equipment is frequently moved to different venues, and accidental connection to 220V is a real possibility. See pages 5-6 or more information on the various protection features' indicator lights. Despite its many protective features, you should be aware that the PS-PRO 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 of one of Furman's AC Line Voltage Regulators in addition to the PS-PRO. If you do use a voltage regulator, run the raw power line into the regulator first so that the PS-PRO receives a stabilized voltage to distribute. MA I N S W I R I N G FAU LT A N A LY Z E R The PS-PRO 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 the fault's 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. O N or O F F SEQUENCING 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 REM or OFF position. The START ON-OFF SEQUENCE pushbutton is not normally used in local operation. NOTE: If the PS-PRO is to be used under local control only, and a jumper is installed on JMP1, and no switch is connected to the PS-PRO's terminal strip, 3 PS-PRO - POWER CONDITIONER/SEQUENCER then a jumper should be connected between the REM and +12V terminals. Otherwise, turning the front panel key switch to the REM position will turn the PS-PRO ON. terminals are momentary tied together, the PS-PRO will sequence ON or OFF. JMP3 (MAINT OFF), when the REM and +12V terminals are tied together, the PS-PRO will sequence ON. JMP4 (REM TO GND = ON), when the REM and GND terminals are tied together, the PS-PRO will sequence ON (Note: JMP1 must have a jumper installed). JMP5 spare jumper holder. REMOTE CONTROL When the PS-PRO's front panel key lock switch is in the REM position, it may be controlled by one or more switches in remote locations. In the most basic configuration, only two wires and an SPST switch are needed to initiate an ON or OFF sequence. The switch may be either a momentary or a maintainedcontact type, depending on a jumper setting inside the PS-PRO. If an additional wire is used, an LED may also be installed at the remote end to indicate that the power is on. MOMENTARY vs. MAINTAINED CONTACT SWITCHING An on-off switch of either kind may be used to actuate the PS-PRO's remote operation. Maintained switches, such as most toggle switches and push-on/push-off button switches, (including the Furman RS-1 key lock switch), stay open until switched, and then remain closed until switched again. Momentary switches, usually pushbutton types like the Furman RS-2 (which also provides a locking key switch), are normally open and stay closed only as long as the button is pressed. Maintained switches are generally the most convenient when there is only one remote location. When more than one location is required, momentary switches offer the advantage of a turnon or turn-off sequence which may be started from any location. The PS-PRO main circuit board has 5 pairs of terminals (PCB REV D and later) labeled as: JMP1 (Default) (MAINT ON) , when the REM and +12V terminals are tied together, the PS-PRO will sequence OFF. JMP2 (MOMENTARY), when the REM and +12V PS-PRO units come factory-set for maintained operation (jumper is installed on JMP1). They may be easily converted to other operating modes by moving jumper plug/plugs on the PS-PRO's circuit board. To do this, first disconnect the unit from AC power. Remove the six screws that secure the top cover and one screw from the front panel. Just install the jumper plugs to the desired mode of operation. Reattach the top cover. MAINTAINED MODE There are 3 maintained modes of operation: REM to +12V = OFF (jumper plug installed on JMP1, MAINT ON) MAINTAINED MODE (continued) (continued on page 7) 4 PS-PRO - POWER CONDITIONER/SEQUENCER FRONT PANEL START ON/OFF SEQUENCE: This pushbutton switch is used only when the key lock switch is in REM position and the PS-PRO is in Momentary Mode. It then acts the same as any other remote momentary switch that may be connected to the rear panel terminal strip. If the switched outlets are on, pushing it begins an OFF sequence. If they are off, pushing it begins an ON sequence. Do not use this switch ...