Download product and application bulletin

PRODUCT AND APPLICATION BULLETIN
FILE:
Section 7
PRODUCT:
®
Nexia SP - digital signal processor
Voltage Control Box - remote control interface
601 - mic/line mixer
APPLICATION:
Industrial Paging System
TYPICAL REQUIREMENTS:
Multiple page-source microphones.
Multiple paging zones with individual zone level controls.
The need for a 'master' or emergency page override.
PRODUCT OVERVIEW:
Nexia SP is a digital signal processor with 4 line inputs and 8 independent mix outputs.
Intended for speaker processing applications requiring line inputs feeding a larger
number of discrete outputs, Nexia SP includes a broad selection of audio components,
routing options, and signal processing. The internal system design is completely user
definable via PC software, and can be controlled via dedicated software screens, RS-232
control systems, and/or a variety of optional remote control devices. Multi-unit Nexia
systems can be created utilizing Ethernet and NexLink digital audio linking.
Voltage Control Box provides four inputs for analog potentiometers, plus four logic
connections, as a programmable control interface. Voltage Control Box allows creation of
custom control panels, with completely programmable functions. Potentiometers may be
assigned to control various system levels. Logic connections may be assigned individually
as either inputs or outputs, for switch control of internal functions such as preset
selection or for triggering external circuits such as status indicators. The Voltage Control
Box is connected to a system on a 5-wire daisy-chain, eliminating the need for local power
sources. This connection also provides the serial communication to the Nexia system.
Multiple Voltage Control Boxes, as well as other Nexia controls, can be connected on a
single bus, over a large physical distance.
The 601 is a single rack space, six input mic/line mixer. Each input channel uses a
differentially balanced, discrete transistor mic/line preamplifier for low noise and low
distortion performance. Inputs are provided to accept signals from microphones and/or
line level devices. Special features, including a limiter and remote level control, make the
601 extremely versatile.
Biamp Systems | 9300 S.W. Gemini Drive | Beaverton, OR | 97008 | USA | +1.503.641.7287 | www.biamp.com
Paging Mirophones
601
enable
designed and assembled in the USA
www.biamp.com
6
4
3
input
2
pad
pad
pad
pad
pad
5
input
phntm
input
phntm
input
phntm
input
phntm
input
pad
ch 6 duck
phntm
remote
601
remote
v c
ch 5
ch 4
ch 3
ch 2
ch 1
15 watts
class 2 wiring
patch
in out
patch
main out stack in
phntm
BIAMP SYSTEMS
~
27V
50/60 Hz
1
Security / Fire Department
VCB
2
V
3
4
V
2
4
3
Remote Control Bus
12~24VDC @ 920mW
inputs
3 4
2 1
outputs
hi lo
power
1
Logic
1
status
Analog
Voltage
Control
Box
power
Logic inputs activated via contact-closure or 5V TTL
Logic outputs open-collector (40V/500mA max. per output)
Voltage
Control
Box
term
VCB
Logic inputs activated via contact-closure or 5V TTL
Logic outputs open-collector (40V/500mA max. per output)
1
2
V
3
4
V
Logic
1
2
4
3
Remote Control Bus
12~24VDC @ 920mW
inputs
3 4
status
Analog
2 1
outputs
hi lo
RP-L1
RP-L1
RP-L1
RP-L1
RP-L1
RP-L1
term
Nexia SP
BIAMP SYSTEMS
®
NexLink Rx
designed and assembled in the USA
www.biamp.com
CAUTION
RISK OF ELECTRICAL SHOCK.
DO NOT OPEN.
Class 2
wiring
C
UL
R
LISTED
52SJ
US
Remote
Control Bus
outputs
8
serial
7
6
5
inputs
4
3
2
1
4
3
2
1
~
100-240V
50/60Hz
65 Watts, 1.0 A
term
hi lo
Ethernet
NexLink Tx
24VDC @ 0.5A
+15
+15
0
0
-15
peak
signal
present
on
-15
64
125
250
500
1K
2K
4K
8K
D60EQ
Main Office
16K
level
D60EQ
+15
+15
0
0
-15
peak
signal
present
on
-15
64
125
250
500
2K
1K
4K
8K
16K
D60EQ
Bldg. # 1
level
D60EQ
CPA650
peak
Wood
Yard
peak
1
2
level
level
+15
+15
0
0
-15
peak
signal
present
on
-15
64
125
250
500
2K
1K
4K
8K
16K
D60EQ
Bldg. # 2
level
D60EQ
CPA 650
+15
+15
0
0
-15
peak
signal
present
on
-15
64
125
250
500
2K
1K
4K
8K
D60EQ
Bldg. # 3
16K
level
D60EQ
+15
+15
0
0
-15
peak
1
2
level
level
peak
signal
present
on
-15
64
125
250
500
1K
2K
4K
8K
16K
CPA650
peak
D60EQ
Bldg. # 4
level
Kiln
Room
D60EQ
CPA 650
+15
+15
0
0
-15
peak
signal
present
on
-15
64
125
250
500
1K
2K
4K
8K
16K
level
D60EQ
Security /
Fire Department
D60EQ
Biamp Systems | 9300 S.W. Gemini Drive | Beaverton, OR | 97008 | USA | +1.503.641.7287 | www.biamp.com
APPLICATION EXAMPLE:
Consider a multi-building industrial complex (a saw mill and wood kiln in this case) with
the following set-up...
●
A total of 6 paging microphones...
✔
✔
✔
●
●
One mic at the plant entrance-gate shack.
Four department office microphones (in four processing buildings).
One mic at the main office reception desk.
An emergency announcement microphone in the Security/Fire Department.
A total of 8 all-call paging zones...
✔
✔
✔
✔
Four for the processing buildings (one zone for each).
One in the main office.
Two outside zones (one each at the wood yard and the kiln).
One at the Security/Fire Department office.
Personnel paging is infrequent, but has to be available at all locations in the complex.
Ambient noise levels (and thus, the required paging volume) vary widely from zone to
zone. For safety considerations, announcements from the Security/Fire Department
office must override any other announcement in process.
This application was handled using a 601 mixer and a Nexia SP as illustrated in the
diagram on the facing page.
The six push-to-talk paging microphones are brought into a 601 mixer. The output of the
mixer feeds input ‘Channel 1’ of a Nexia SP. The Security/Fire Department microphone
was brought directly into input ‘Channel 2’ of the Nexia SP. Each of the eight Nexia SP
outputs feeds an appropriate combination of amplifier (D60EQ or CPA 650) and speakers,
depending on the zone being serviced.
The push-to-talk switch on the Security/Fire Department mic is wired to a logic input on
one of two Voltage Control Boxes (connected to the Nexia SP). When the switch is not
being pressed, input 'Channel 1' is active and input 'Channel 2' is muted (at all outputs).
When the switch is being pressed, input 'Channel 1' becomes muted and input 'Channel
2' is un-muted (at all outputs). When an emergency announcement is required, the switch
is pressed, blocking all signals at input 'Channel 1' of the Nexia SP (paging mics from 601),
and opening input 'Channel 2' for the emergency announcement.
In the system design (see back page), two Voltage Control Boxes provide remote control of
output paging level adjustment for most zones. However, fluctuating noise levels in the
wood yard and kiln areas are being addressed automatically, utilizing Ambient Noise
Compensators and sensing microphones (input ‘Channels 3 & 4’ of the Nexia SP). A
Leveler maintains consistent paging input level, regardless of microphone in use.
D60EQ amplifiers supply appropriate power and equalization for all areas, except the
wood yard and kiln. For those two areas, a greater amount of power was required (more
speakers and higher volume). Therefore, these two areas are being powered by CPA650
amplifiers, and Equalizers have been added at the corresponding outputs of the Nexia SP.
Biamp Systems | 9300 S.W. Gemini Drive | Beaverton, OR | 97008 | USA | +1.503.641.7287 | www.biamp.com
7-6app.doc
Biamp Systems | 9300 S.W. Gemini Drive | Beaverton, OR | 97008 | USA | +1.503.641.7287 | www.biamp.com