PowerLink REMOTE AC POWER SEQUENCE CONTROLLER AC POWER SEQUENCING POWERLINK REMOTE AC POWER SEQUENCE CONTROLLER QUICK START The illustrations below show several of the most common hookup methods for the PowerLink. There are many other methods and features, however, so please refer to the rest of this manual for more details if necessary. For single unit operation with turn on from local or one remote location. Default is maintained contact closure. +12V START FORCE STATUS REM ON FORCE REM OFF COM GND COM A B C D E F ON LATCHING (MAINTAINED) REMOTE SWITCH OFF Multiple remote switches require use of Momentary Mode. Open the unit and move suitcase jumper from JMP2 to JMP1. +12V FORCE START ON REM STATUS FORCE REM OFF COM GND COM A B C D E F MOMENTARY REMOTE SWITCHES 1 POWERLINK REMOTE AC POWER SEQUENCE CONTROLLER INTRODUCTION Congratulations on your purchase FEATURES Allows you to trigger six power control devices in a sequenced fashion Six circuits, each with a front panel status indicator Circuits can be powered up and down in sequence Three position switch allows each circuit to be part of the sequencing, or to be switched on/off independently Six low level relays provide contact closure (or opening) to control and sequence other units, such as additional PowerLinks, Furman PowerPorts, MiniPorts, ASD-120 Sequenced Power Distros and the PS-8R and PS-PRO Power Sequencers Sequence timing can be initiated from unit or remotely using low voltage control wires Front panel key switch for security Compact single rack space package Three unswitched AC circuits ­ two on the rear, one on the front of a Furman PowerLink Remote AC Sequence Controller. Please read this manual completely before installing your PowerLink. 2 POWERLINK REMOTE AC POWER SEQUENCE CONTROLLER DESCRIPTION The Furman PowerLink is a compact, low-cost rackmount Remote Sequencer that provides timing for up to six power control devices, turning them on and off in a preset seq uence. The delay interval between the turn-on or turn-off of each device and the next in sequence is useradjustable via an internal trimpot. PowerLink can work with a group of relay-controlled circuits such as Furman MiniPorts, to create a very flexible power control system that can expand to handle as many circuits carrying as much current as needed. An on or off sequence can be initiated from the PowerLink itself, using the built-in high-security locking key switch, or, if the key switch is set to enable Remote operation, by one or more momentary or maintained-action switches in distant locations. The outputs of the PowerLink are low power relay contacts, accessible through rear-panel screw terminal strips. Outputs may be configured to be normally-closed or normally-open by internal jumpers. All input and output commons are electrically isolated to avoid the creation of ground loops. Power sequencing is needed 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 preamplifiers and processors to settle down before any power amps are turned on. This is because simultaneous powering can result in a loud, annoying, 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 3 cause circuit breakers to trip even though the steady-state currents are not excessive. The PowerLink's front panel provides a threeposition switch for each control output that allows each control output to be part of the power up/down sequence, or to remain on or off apart from the sequence. It also provides an LED that indicates when the circuit in on. The outputs of the PowerLink are low power relay contacts, which can control Furman PowerPorts, MiniPorts, PS-PRO and PS-8R Power Sequencers, or any other circuits that need to know when a particular time delay has elapsed. In larger systems, one or more additional PowerLinks can be installed in remote locations and operated via low-voltage control wiring, providing the capability of controlling power sequencing for a system of any size. CONTROLLING ON/OFF SEQUENCE A normal, time-delayed on or off sequence may be initiated in either of two ways: locally, via the front panel key switch, or remotely, via a remotely located maintained or momentary switch connected to the PowerLink's rear panel terminal strip. In addition, the behavior of any individual circuit may be overridden by its corresponding front panel ON/SEQ/OFF toggle switch. The PowerLink's control circuits turn on the circuits in order from A to F when sequencing on, and turn the circuits off in the reverse order from F to A when sequencing off. The time for each step is internally adjustable with a trim pot, with a range of 0.2 to > 12 seconds per step. (Total time for the entire sequence is from 1 second to > 1 minute). Local control: Turning the key to the ON (or possibly REM) position initiates an on sequence. Please POWERLINK REMOTE AC POWER SEQUENCE CONTROLLER note that in the absence of any signal applied to the remote input, the REM position defaults to on. (If the PowerLink has been changed from the factorypreset Maintained Mode to Momentary Mode, you must also press the START ON/OFF SEQUENCE button. However, for purely local control, you should leave the mode set to Maintained.) When the unit is turned on with the key switch, the PowerLink will stay on if all of its six circuits are already on, or, if all circuits are off, will begin turning on circuits starting with circuit A, then B, etc. until all circuits are on. If the unit was in the middle of sequencing off and had not yet turned off all circuits, the lowest circuit that was currently off will go on, so the sequence reverses without ever deactivating the circuits that had not yet gone off. The lowest off circuit turns on within 0.2 seconds, regardless of the setting of the delay time trimpot. The next and all following circuits turn on at intervals controlled by the trimpot. The factory default setting is approximately 1 second per step. When the unit is turned on with the key switch, the PowerLink will stay off if all circuits are already off, or, if all circuits are on, will begin turning off circuits starting with circuit F, then E, etc. until all circuits are off. If the unit was in the middle of sequencing on and had not yet turned on all circuits, the highest circuit that is currently on will go off, so the sequence reverses without ever activating the circuits that had not yet turned on. The highest on circuit turns off within 0.2 seconds, regardless of the setting of the internal delay time trimpot. The next and all following circuits turn off at intervals controlled by the trimpot. Remote Control: In the REM (center) position, an on or off sequence is initiated by one or more switches connected to the rear panel inputs, or, in Momentary mode, also by the START ON/OFF SEQUENCE button. The PowerLink responds exactly as it does as described in the preceding section on local control. See the next section for a discussion of Remote Operating Modes. When the key is in either the ON or OFF position, the PowerLink's sequencing circuits will not respond to the rear panel remote control inputs. If the key switch is later returned to the REM position, the signals supplied to the rear panel remote inputs will again control the unit. Overriding a sequence: The PowerLink circuits POWE RLINK L REMOTE SEQUENCER A ON SEQ OFF SEQ B ON SEQ OFF C ON SEQ OFF D ON SEQ OFF E ON SEQ OFF F ON OFF START ON / OFF SEQUENCE REM ON REM ON 15 A M P OFF UNSWITCHED OUTLET PowerLink front panel 120 VAC 60HZ 15A MAX RISK OF ELECTRIC SHOCK. DO NOT OPEN. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN AND MOISTURE. CAUTION! 120 VAC 60 HZ +12V START FORCE STATUS REM ON FORCE REM OFF COM GND COM A B C D E F ETL LISTED CONFORMS TO ANSI/UL STD. #1419 C CERTIFIED TO CAN/CSA C22.2 STD. NO. 1 MADE IN U.S.A. 9801539 N'OUVREZ PAS­RISQUE DE CHOC ELECTRIQUE AVIS: MAX LOAD 15A PowerLink rear panel 4 POWERLINK REMOTE AC POWER SEQUENCE CONTROLLER are turned on and off by six low level relays. The relays are controlled by drivers that can be activated either by the internal control circuits, or directly by a three-position toggle switch. The six ON/SEQ/OFF toggle switches (one per circuit) can override the sequencing circuits, and are intended as a secondary means of control to allow individual on/off control of each circuit for diagnostic purposes. Following are the three positions of each ON/SEQ/OFF toggle switch. Up: Circuit is on regardless of state of sequence control circuits. Center: Circuit is controlled by the sequence circuits (the normal position). Down: Circuit is off regardless of state of sequence control circuits. The center position is the normal operating position, and allows control by the sequencing circuits. Signal relays: The PowerLink's relays are accessible by the rear panel terminals labeled A through F. These relays have an isolated common (labeled RELAY COM) that is independent of the chassis and signal grounds of the PowerLink, for easy interfacing to virtually any other device that could act as a slave to follow the PowerLink. There is an internal jumper for each signal relay that allows selection of the normally closed or normally open contacts between each of the A to F terminals and RELAY COM. The factory default is that the contacts are open when the asso-ciated circuit is off (normally open). The relay contacts may be easily converted to normally closed operation by moving six "suitcase" jumpers on the PowerLink's circuit board. To do this, first disconnect the unit from AC power. Remove the four screws that secure the top cover. There are twelve small two-pin connectors labeled J1 through J12, located near the left side of the largest circuit board. Six of the twelve are joined by small black suitcase jumpers. To change the mode, gently pull them up and reposition them in accordance with Table 4 on page 7. Replace the 5 top cover and screws. REMOTE OPERATING MODES If the PowerLink will be controlled locally only, you may skip this section and the next section of the manual. There are three remote operating modes available: Maintained Mode/Normally On, which is the default, Maintained Mode/Normally Off, and Momentary Mode. The Momentary Mode on the PowerLink shares the same characteristics as the Momentary Mode on the Furman PowerPort, MiniPorts, ASD-120 Sequenced Power Distro, and PS-PRO and PS8R Power Sequencers. Remote inputs (REM, FORCE ON, FORCE OFF) are controlled by applying at least 5 VDC or 6 VAC between the input and the REM COM terminal. This is the default control logic on all of our existing and past power products. However, the PowerLink's inputs are enhanced in the following ways: (1) They are polarity independent, and work with positive, negative or AC control signals. (2) They are optically isolated. The remote control inputs have a floating common. MAINTAINED MODE/NORMALLY ON (DEFAULT) In the absence of any signal applied to the remote input, the PowerLink will sequence on as soon as power is applied, and the key switch is turned to REM or ON. This is Maintained Mode/Normally On. In this mode, voltage must be continually applied to the REM input to keep the PowerLink's circuits off, when the key switch is in the REM position. This mode is compatible with all other Furman power products' REM inputs. Internal jumpers allow selection of either of two other optional modes, as described below. Please POWERLINK REMOTE AC POWER SEQUENCE CONTROLLER also see Table 4, Internal User Settable Jumpers, on page 7. where multiple PowerLink's are controlled from remote locations. Please see the section "Compatibility with Other Furman Products." MAINTAINED MODE/NORMALLY OFF This mode is just the reverse of the Maintained Mode/Normally On mode. The PowerLink's circuits stay off until voltage is applied to the REM input. Voltage must be continually applied to keep the unit on, when the key switch is in the REM position. This setting will be useful to interface to other brands of controller that have positive control logic (i.e. they put out a signal to indicate that attached gear should turn on). In addition, since the REM inputs are optically isolated, this mode allows the PowerLink to sequence on if some other source of AC line voltage is turned on. SETUP FOR REMOTE OPERATION The barrier terminal strip on the PowerLink rear panel allows a switch (or switches) to be connected to turn the unit on or off at a distance, and provides various power, status and ...