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 lim- ited 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.)
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 turn- ing on, or will shut down under extreme condi-
3
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 regula- tor, 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 used under local | |
| be installed at the remote end to indicate that the | |
| control | and a jumper is installed on JMP1, | |
| power is only,. | | |
| and no switch is connected to the PS-PRO HT’s | |
| Momentary vs. Maintained Contact | |
| terminal strip, then a jumper should be connected | |
| Switching | | |
| between the 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
