Furman PWRLINK User Manual
PowerLink
REMOTE AC POWER
SEQUENCE CONTROLLER
AC POWER
SEQUENCING
POWERLINK REMOTE AC POWER SEQUENCE CONTROLLER
POWERLINK REMOTE AC POWER SEQUENCE CONTROLLER
A
FORCE
OFF
FEDCB
COM
GNDREM
COM
FORCE
ONREM
START
STATUS
+12V
ON
OFF
LATCHING (MAINTAINED)
REMOTE SWITCH
B
+12V
E
COM
FORCE
OFF
GND
F
REM
COM
D
FORCE
ON
REM
C
START
A
STATUS
MOMENTARY
REMOTE SWITCHES
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.
Multiple remote switches require use of Momentary Mode. Open the unit and move suitcase jumper
from JMP2 to JMP1.
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POWERLINK REMOTE AC POWER SEQUENCE CONTROLLER
INTRODUCTION
Congratulations on your purchase
of a Furman PowerLink Remote AC Sequence
Controller.
Please read this manual completely before
installing your PowerLink.
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 cir-
cuit 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
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POWERLINK REMOTE AC POWER SEQUENCE CONTROLLER
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 exible 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 congured 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 preampliers 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 ampliers 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.
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
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