General information
The
Mp-20 power relay
provides a 20 amp relay
switched 120 VAC outlet, with a terminal strip that allows
remote control via safe, inexpensive, low voltage Class 2
control wiring. The
Mp-15
is identical to the MP-20, but is
rated at 15 amps. Both units include an internal 12 VDC
supply. They are housed in a rugged all-metal enclosure
and come equipped with a heavy duty, 10 foot AC cord.
The MP-20 and -15 are listed by NRTL for use in the U.S.
and Canada. The MP-15Q and 20Q are designed for quad
box mounting and have fewer features.
The MP-20 and MP-15 can be used independently
with an RS-1 System Control Panel, or with any other
momentary or maintained-action SPST switch. MiniPorts
can also be used with the Furman PowerLink or ASD-120
Miniport-20 Wiring Diagram
Figure 1.
Connections
for single or multiple Mini-
Port-20 units, Momentary
or Maintained mode.
Figure 2.
Connections for
amplifier inrush current
reduction, using delayed
turn-on feature. (Turn-off
is not delayed.)
For control from more than
one location, use Momen-
tary Mode and parallel
switch connections.
If using the delay feature
and momentary switches,
first unit must be in Mo
-
mentary Mode, all others
in Maintained Mode. For
control from more than one
location, parallel switch con-
nections to Unit 1.
+12V STATUS REM GND DELAY
MINIPORT #1
MINIPORT #2
+12V STATUS REM GND DELAY
+12V STATUS REM GND DELAY
MINIPORT #1
MINIPORT #2
+12V STATUS REM GND DELAY
TO OTHER UNITS
TO OTHER UNITS
OPTIONAL LEDS
UNIT 2
UNIT 1
ADD GROUND
FOR > 150' RUNS
OPTIONAL LEDS
UNIT 2
UNIT 1
ADD GROUND
FOR > 150' RUNS
for extra capacity.
With the addition of a PS-REL AC Relay, the MiniPort
can also be used to extend the
capacity of a Furman PS-8R or
PS-PRO Power Sequencer — or
any product with a switched outlet,
such as a receiver/amp controlled
with a wireless remote. When
used in this manner, the MiniPort
is switched on or off when the
outlet into which the PS-REL is
plugged goes on or off.
Momentary vs. Maintained Contact switching
An on-off switch of either kind may be used to actuate
the MiniPort. Maintained switches, such as most toggle
switches, push-on/push-off button switches, and the
Furman RS-1 locking key switch, stay open until switched,
then stay closed until switched again. Momentary
switches, usually pushbutton types, are normally open and
stay closed only as long as the button is pressed.
Maintained switches are most convenient when there
is only one remote switch location; momentary switches
allow turn-on or turn-off from multiple locations.
MiniPorts come factory-configured for maintained
operation. They may be easily converted to momentary
operation by moving a jumper on the MiniPort’s circuit
board. To do this, first disconnect the unit from AC power.
Remove the four screws that secure the bottom cover.
In the middle of the circuit board (as viewed from the
bottom of the unit), there are two pairs of terminals, one
labeled “MAINTAINED” and the other “MOMENTARY.”
There is a small black jumper linking the MAINTAINED
terminals. Slide it up and off, and replace it securely over
the MOMENTARY terminals. Reattach the cover.
Maintained Mode
In the simplest configuration, to control a single
MiniPort from a single remote location, connect a
maintained-action SPST switch to the REM and
+12V terminals. Power will be available at the MP-
15/20’s AC outlet when the switch is open, and will be
removed when it is closed. If the cable run is greater
than 150 feet, we recommend that the REM wire be tied
to ground during operation rather than leaving it floating,
using an SPDT switch as shown in Figure 1.
Momentary Mode
In Momentary Mode, the MP-20 and MP-15 have
“memory” — they only need a momentary signal on the
remote terminal to change their state from OFF to ON,
or ON to OFF.
When first plugged in (or after power is lost
