PS-PRO HT - POWER CONDITIONER/SEQUENCER MODEL: PS-PRO HT Owner's Manual Featuring 3-Channel Sequencing, 20 Amp Capacity, Over Voltage Shutdown, and Programmable Home Theater Pro Level AC Power Conditioner/Sequencer PS-PRO HT - POWER CONDITIONER/SEQUENCER F E AT U R E S 20 amp (2400 watt) rating handles even the largest power amplifiers. Multiple levels of protection components can safely absorb large voltage spikes and provide highly effective RFI / EMI filtering. Extreme Voltage Shutdown guards against catastrophically high voltages. Power Status LED's indicate which outlet groups have power. Remote operation allows turn-on and turn-off at a distance simply by connecting a momentary or maintainedcontact switch (and LED if desired). Multiple units may be linked to handle higher currents and/or more than three delay groups. Three unswitched outlets (one front, two rear). Ten foot 12 AWG heavy duty power cord. Three year limited warranty. Congratulations on your purchase of a Furman PS-PRO HT Power Conditioner/Sequencer. The PS-PRO HT offers maximum protection from AC line hazards faced by delicate analog and digital A/V equipment. The PS-PRO HT is a power sequencer, meaning it is capable of powering a full systems 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. DESCRIPTION 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 results in a loud, annoy- INTRODUC TION 1 PS-PRO HT - POWER CONDITIONER/SEQUENCER ing, and potentially destructive "pop" reaching the speakers. 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 HT 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, REM, and ON, allowing for local or remote control. With remote control, one or more PS-PRO HT's may be installed in remote locations with on/off control and LED monitoring via low-voltage control wires. The PS-PRO HT interfaces with computer touch screen systems as well. Besides its power sequencing capabilities, the PS-PRO HT contains many other conditioning and protection features. Both aspects of its functioning will be discussed in the next sections. The PS-PRO HT 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 HT 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 HT will lose power simultaneously. However, when power is restored, the delayed outlet groups will again turn on in the usual delayed sequence (Remains off in Momentary Mode). Installation Recommendations: In home theater installations, we recommend that power amps or receivers be powered 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 video and audio 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 HT 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 HT. Then push the white button on the circuit breaker (on 2 PS-PRO HT - POWER CONDITIONER/SEQUENCER the front panel) in to reset it. Although 20 amps is an absolute limit, the PS-PRO HT 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 HT 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 HT'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 HT 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 HT's rear panel.) tions, if the voltage falls below 80 volts or rises above 140 volts. This feature is called "Extreme Voltage Shutdown." See pages 5-6 for more information on the various protection features' indicator lights. Despite its many protective features, you should be aware that the PS-PRO HT does not compensate if the AC line voltage itself is high or low (i.e., it does not compensate for brownout conditions). If you are in an area particularly prone to brownouts, you may benefit from the use of one of Furman's Reference AC Line Voltage Regulators in addition to the PS-PRO HT. If you do use a voltage regulator, run the raw power line into the regulator first so that the PS-PRO HT receives a stabilized voltage to distribute. ON OR OFF 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. Remote Control: When the PS-PRO HT'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 maintained-contact type, depending on a jumper setting inside the PS-PRO HT. If an additional wire is used, an LED may also NOTE: If the PS-PRO HT is to be indicate that the be installed at the remote end toused under local control on. power is only, and a jumper is installed on JMP1, and no switch is connected to the PS-PRO HT's Momentary vs. jumper should be connected terminal strip, then a Maintained Contact between the Switching REM and +12V terminals. Otherwise, turning the front panel key switch to the REM An on-off switch of either kind may be used to actuate the PS-PRO HT's remote operation. Maintained switches, such as most toggle POWER CONDITIONING FEATURES The PS-PRO HT provides a very high degree of power conditioning protection for your expensive and delicate equipment. What sets Furman's 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 capacitors. This unique combination can safely absorb and dissipate large spikes from nearby lightning strikes and other sources (up to 13,000 amps), 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 HT will even keep itself from turning on, or will shut down under extreme condi- 3 PS-PRO HT - POWER CONDITIONER/SEQUENCER 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 push-button 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 most convenient when there is only one remote location. When more than one location is required, momentary switches offer the advantage of a turn-on or turn-off sequence which may be started from any location. For integrating the PS-PRO HT into computer control/touch screen systems use "momentary mode." The PS-PRO HT main circuit board has 5 pairs of terminals labeled as: JMP1 (MAINT ON), when the REM and +12V terminals are tied together, the PS-PRO will sequence OFF. JMP2 (MOMENTARY), when the REM and +12V terminals are momentary tied together, the PSPRO 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 HT will sequence ON (Note: JMP1 must have a jumper installed). JMP5 spare jumper holder. PS-PRO HT units come factory-set for maintained operation (jumper is installed on JMP3). They may be easily converted to other operating modes by moving jumper plug/plugs on the PS-PRO HT's circuit board. To do this, first disconnect the unit from AC power. Remove the four 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) The connection of the REM terminal to the +12V terminal initiates an OFF sequence. Use this setting when you want to use the RS-1 as a remote controller. (Continued on page 7) (Continued from page 4) Disconnecting initiates an ON sequence. If the cable run is long, it is recommended that the REM wire be tied to the PS-PRO HT's GND terminal during ON operation rather than leaving it floating. This will require the use of a third conductor and a double-throw switch. REM to +12V = ON (jumper plug installed on JMP3, MAINT OFF) Defaut Setting The 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-PRO HT's GND terminal during OFF operation rather than leaving it floating. REM to GND = ON (jumper plugs installed on JMP1 and JMP4) 4 PS-PRO HT - 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 HT 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 when in Maintained Mode. PROTECTION OK: This LED is normally on when the power to the PS-PRO HT's outlets is switched on. It monitors the integrity of the protection devices and reports if the protection is compromised. If an extremely large spike is encountered that exceeds the PS-PRO HT's capacity, the main group of input protectors will blow an internal fuse, causing the indicator to go out. If this LED is not lit when the power switch is on, full protection is not functionin ...