Meyer Sound UMS-1P - Manuel (Page 6)

Looping Audio Input Module
This standard module uses a balanced,
female XLR connector for audio input
and a male XLR loop connector to inter-
connect multiple loudspeakers. The
audio input connector is hardwired with
pin 2 hot to comply with audio industry
standards. The loop connector, wired in
parallel to the audio input, transmits
the input signal even if the UMS-1P is
turned off for any reason.
Looping Audio Input Module
Looping, Polarity, and
Attenuating Audio Input
Module
This module has a balanced, female XLR
audio input connector, a male XLR loop
connector, an input polarity switch, and
a level attenuator knob. The input polar-
ity switch offers a convenient method of
reversing the phase of the loudspeaker.
When the input polarity switch is in the
up (+) position, pin 2 is hot relative to
pin 3, resulting in a positive pressure
wave when a positive signal is applied
to pin 2. When the switch is down (-),
pin 3 is hot relative to pin 2, resulting
in a positive pressure wave when a posi-
tive signal is applied to pin 3. The level
attenuator knob operates between 0 dB
(no level attenuation) in a fully clock-
wise position to -18dB in a fully coun-
terclockwise position.
Remote Monitoring System
The UMS-1P can be equipped to operate
with the Remote Monitoring System
(RMS) network and software application.
RMS displays signal and power levels,
driver status, limiter activity, the state
of the polarity switch, attenuator level,
and amplifier temperature for all loud-
speakers in the network on a Windows-
based PC. RMS can also be configured to
enable loudspeaker muting. RMS is an
excellent field diagnostic tool that
removes the guesswork from trou-
bleshooting during a performance.
All Meyer Sound loudspeakers with RMS
can be integrated on the same network.
Installing an RMS module requires only
a Phillips screwdriver. Contact Meyer
Sound for more information about RMS.
6
Amplification and Limiting
Each of the MS-410 drivers in the UMS-
1P is powered by one channel of a pro-
prietary Meyer Sound amplifier utilizing
complementary power MOSFET output
stages (class AB, bridged, 225 Wrms/ch
burst). The UMS-1P employs two sepa-
rate methods of limiting: Excursion
Limiting which protects the drivers from
over excursion and Sub Channel Limiting
which prevents the drivers from damage
due to thermal overload.
Limiter activity for the Excursion and
Sub channel is indicated by two yellow
Limit LEDs on the rear panel (the EXC.
Limit LED is above the SUB Limit LED).
See page 11 for a diagram of the user
panel.
The UMS-1P performs within its acoustical
specifications and operates at a nomal
temperature if the limit LEDs are on for
no longer than two seconds, and off for
at least one second. If either LED
remains on for longer than three seconds,
that channel will operate with these
characteristics:
• Increasing the input level will not
increase the volume.
• The system distorts due to clipping
and nonlinear driver operation.
While the UMS-1P limiters fully protect
the system under overload conditions
and exhibit smooth sonic characteris-
tics; we recommend that you do not
intentionally drive the UMS-1P into con-
tinuous limiting to attain compression
effects.
For applications where large amounts of
compression are required, we recom-
mend using an outboard compressor/
limiter for greater control of limit and
compressor effects.
AMPLIFICATION, LIMITING, AND COOLING SYSTEMS
Loop Input On / Temp.
Limit Earth /
Chassis
Case
220k Ω
GND
Circuit 1
2
3 1
2
3
10k Ω Balanced +
-
Looping Audio Input
Network
Service Wink Reset Activity
R e m o t e M o n i t o r S y s t e m
230 115
+
-
Polarity
Loop Input On / Temp.
Limit
Attn dB
- 18
- 15
- 12 - 6
- 3
- 9
0
Earth /
Chassis
Case
220k Ω
GND
Circuit 1
2
3 1
2
3
10k Ω Balanced
+
-
Looping Polarity & Attn. Audio Input
! AC Input 115 / 230V
~
50-60Hz 3A MAX
AC Loop Output 115 / 230V
~
50-60Hz 15A MAX
Class 1 Wiring
SET VOLTAGE BEFORE APPLYING POWER
RISK OF FIRE REPLACE WITH F3.15A - 250V FUSE
Meyer Sound
Model UPM-1P
CAUTIONS:
F3.15A 250V
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE F3.15A - 250V
User Panel with RMS option and Polarity and Attenuaing Audio Input Module