The ASD-120 AC Sequenced Power Distro is an extremely compact,
low cost rackmount power distribution system that is ideal for
touring PA systems, touring musical and theatrical acts, mobile
recording facilities, on-location film and video shoots, etc.-any
situation where AC power must be distributed to multiple circuits
and a hard-wired, built-in system is missing, inadequate, or
impractical. Use of a Power Distro is cost-effective, both in
terms of the convenience it offers and the elimination of bulky
and expensive parallel feeds and related connectors. The ASD-120
offers many more features as well.
The ASD-120 allows you to power up and its six circuits in a
sequenced fashion. The sequence is reversed for power down. The
delay interval is user-adjustable via an internal trimpot.
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 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 cause circuit breakers
to trip even though the steady-state currents are not
excessive.
The ASD-120's front panel provides a three-position switch
for each circuit that allows each circuit to be part of the power
up/down sequence, or to remain on or off apart from the sequence.
An LED that indicates when either the power-up or power-down
sequence is in progress. The sequence can be initiated with
either momentary or maintained switches, locally or remotely. A
duplex outlet is provided for each delay step. A locking switch
with a removable key is provided for maximum security.
Since the sequence control signals are also available on the
rear panel, one or more ASD-120's may be installed in remote
locations and operated via low-voltage control wiring. The
sequence control signals can also drive PowerPorts, MiniPorts,
PS-PRO and PS-8-R Power Sequencers, or any other circuits that
need to know when their particular time delay has elapsed. Using
one or more ASD-120's can provide the capability of
controlling power and power sequencing for an entire system.
The ASD-120 can handle up to 120 amps of incoming power,
distributing it to six 20 amp, 120V circuits. Each circuit has a
front panel status indicator that lights up when it is turned on,
and a 20 amp duplex outlet on the rear panel.
The ASD-120's design incorporates four oversized busses,
allowing wiring for 120V or 240V single phase, or 208V three
phase power. A strain relief clamp is provided that can
accommodate a cable or wire bundle up to 1.5 inches in diameter.
Cable termination is a simple process of breaking out and
stripping the individual conductors and connecting them with set
screws, and then tightening the strain relief clamp. Complete
instructions accompanying the unit guide the user through the
process of selecting and terminating the supply cable.
ASD-120 Rear View
Features:
- 120 amp total load
- Six 20 amp, 120 volt circuits, each with a status
indicator
- Oversized buss bars
- Four buss design accommodates 120V or 240V single phase, or
208V three phase power
- Six widely spaced duplex outlets on rear panel
- Outlets can be powered up and down in sequence
- Three position switch allows each circuit to be part of the
power sequencing, or to be switched on/off independently
- Sequence timing can be initiated from unit or remotely, using
low voltage control wires
- Sequence control signals are available on rear panel to drive
additional ASD-120's or other devices and circuits
- Front panel key switch for security
- Compact two rack space package
- Most economical product of its type
Specifications:
Input Current:
120 amps
Input Voltage:
Either: 120V single phase, 240V single phase, or 208V 3-phase
Output:
Six identical 20 amp, 120V circuits
Delay Interval:
0.5 to 5 seconds per step (adjustable with internal trimpot)
Circuit Breakers:
Thermal, 20 amp
Spike Protection Mode:
Line to neutral on each circuit
Spike Clamping Voltage:
TVSS rating 400V peak, L-N, N-G, L-G (tested to UL 1449)
Response time:
1 nanosecond
Maximum surge current:
6,500 amps
Maximum spike energy:
80 joules per circuit
Mechanical: Dimensions:
3.5" H x 19" W x 8" D, rack mount. Weight: 20 lbs
(9.1 kg). Construction: Steel chassis, zinc chromate plating;
.125" brushed and black anodized aluminum front panel.
Power consumption:
6 Watts
Safety Information:
All current-carrying components are UL/CSA listed.
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