PROEL PROEVAC EVO EV PROM5Z, User And Installation Manual, Page: 16 / 54


APPLICATION NOTE – 8 ZONES SYSTEM
An 8 zones system (with lines A only) is a significant case of study since it is possible to configure Proevac in different
ways according to the requirements of the voice alarm equipment for a specific building. The requirements may be in
favor of the best effort in case of a failure, or look after the best cost/performance ratio. Balancing the risk of a failure for the
Proevac system in this application note, goes through an assessment of the possibility of a fault of one of the main power
amplifiers. As mentioned previously, the master and slave units have the possibility to manage a spare amplifier that will switch
over in case of a failure to the main power amplifier managed by one of the line modules fitted in the unit. Proevac has the
flexibility to optimize the setup in order to achieve the best compromise in terms of cost effectiveness and risk, or at the
extremes, it is possible to configure the system for a maximum economy (with one or no spare amplifiers), or for a minimum risk
with a spare amplifier for each zone, but at a higher cost.
The figure here on the left, describes
an 8 zones, low budget system, but at
the expense of a higher risk. In fact, it
is foreseen only one spare amplifier
(yellow) that will switch over the first
of the eight main amplifiers that will
fail. If a second main amplifier will fail,
no spare amplifier will be available
since it is already in use.
The figure here on the left, describes
an 8 zones system where a good
balance between risk and cost is
achieved
thanks to two spare
amplifiers. Four zone modules are
fitted in the master and four in the
slave. Each group of four is served by a
spare amplifier.
Continuing with this logic, it is possible to furtherly distribute the risk by setting up the same 8 zones with one master, three
slaves, with two zone modules each and four spare amplifiers. Each spare amplifier will eventually serve just two zones:

Master EV 2x EV MCL1Z m spare amplifier

Slave EV 2x EV MCL1Z m spare amplifier
 Slave EV 2x EV MCL1Z m spare amplifier

Slave EV 2x EV MCL1Z m spare amplifier
0
V
1
0
0
V
C
O
L
D
G
N
D
Spare Amplifier
Input / Output
Aux Input
L
R
Power
Input
24 Vdc
H
O
T
Slave Unit Chain
Audio Bus
Output
Data Bus
Output
C
O
M
IN
-1
C
O
M
IN
-2
N
.O
.
C
O
M
N
.C
.
Microphone Consolles
Bus-1 Bus-0
System
Fault
P.S.M.
Message
Contacts
WARNING!
TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE
THIS APPLIANCE TO RAIN OR MOISTURE
M
S
G
-1
C
O
M
M
S
G
-2
C
O
M
Power:
24Vdc
3.5A max
Busy
Voice
Alarm
N
.O
.
C
O
M
N
.C
.
C
O
M
BUSY BUSY BUSY BUSY
BUSY
BUSY BUSY BUSY FAULT FAULT FAULT FAULT
FAULT
FAULT FAULT FAULT
0 V 0 V 0 V
0 V 0 V 0 V 0 V
0 V
0 V 0 V 0 V 0 V
0 V
0 V 0 V 0 V
100 V 100 V 100 V 100 V
100 V
100 V 100 V 100 V
100 V 100 V
100 V
100 V 100 V 100 V 100 V 100 V
COLD COLD
COLD
COLD COLD COLD COLD COLD
GND GND GND
GND GND GND GND GND
HOT HOT HOT HOT
HOT
HOT HOT HOT
COM COM
COM
COM COM COM COM COM
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
MSG-2 MSG-2 MSG-2 MSG-2
MSG-2
MSG-2 MSG-2 MSG-2
MSG-1 MSG-1 MSG-1 MSG-1
MSG-1
MSG-1 MSG-1 MSG-1
A
m
p
lif
ie
r
In
p
u
t /
O
u
tp
u
t
A
m
p
lif
ie
r
In
p
u
t
/ O
u
tp
u
t
A
m
p
lif
ie
r
In
p
u
t /
O
u
tp
u
t
A
m
p
lif
ie
r
In
p
u
t
/ O
u
tp
u
t
A
m
p
lif
ie
r
In
p
u
t /
O
u
tp
u
t
A
m
p
lif
ie
r
In
p
u
t /
O
u
tp
u
t
A
m
p
lif
ie
r
In
p
u
t /
O
u
tp
u
t
A
m
p
lif
ie
r
In
p
u
t /
O
u
tp
u
t
0
V
1
0
0
V
C
O
L
D
G
N
D
Spare Amplifier
Input / Output
Aux Input
L
R
Power
Input
24 Vdc
H
O
T
Slave Unit Chain
Audio Bus
Output
Data Bus
Output
C
O
M
IN
-1
C
O
M
IN
-2
N
.O
.
C
O
M
N
.C
.
Microphone Consolles
Bus-1 Bus-0
System
Fault
P.S.M.
Message
Contacts
WARNING!
TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE
THIS APPLIANCE TO RAIN OR MOISTURE
M
S
G
-1
C
O
M
M
S
G
-2
C
O
M
Power:
24Vdc
3.5A max
Busy
Voice
Alarm
N
.O
.
C
O
M
N
.C
.
C
O
M
BUSY BUSY BUSY BUSY
BUSY BUSY BUSY BUSY
FAULT FAULT FAULT FAULT
FAULT FAULT FAULT FAULT
0 V 0 V 0 V 0 V
0 V 0 V 0 V
0 V
0 V 0 V 0 V 0 V
0 V
0 V 0 V 0 V
100 V 100 V 100 V 100 V
100 V
100 V 100 V 100 V
100 V 100 V 100 V 100 V
100 V 100 V
100 V 100 V
COLD COLD
COLD
COLD
COLD COLD
COLD COLD
GND
GND
GND
GND
GND GND GND
GND
HOT HOT HOT HOT
HOT HOT HOT HOT
COM COM
COM
COM
COM COM
COM COM
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
M
e
s
s
a
g
e
C
o
n
ta
c
ts
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
L
in
e
O
u
tp
u
t
MSG-2 MSG-2 MSG-2 MSG-2
MSG-2
MSG-2 MSG-2 MSG-2
MSG-1 MSG-1 MSG-1 MSG-1
MSG-1
MSG-1 MSG-1 MSG-1
A
m
p
lif
ie
r
In
p
u
t /
O
u
tp
u
t
A
m
p
lif
ie
r
In
p
u
t /
O
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tp
u
t
A
m
p
lif
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r
In
p
u
t
/ O
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tp
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t
A
m
p
lif
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r
In
p
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t /
O
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tp
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t
A
m
p
lif
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r
In
p
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O
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tp
u
t
A
m
p
lif
ie
r
In
p
u
t
/ O
u
tp
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t
A
m
p
lif
ie
r
In
p
u
t /
O
u
tp
u
t
A
m
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lif
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r
In
p
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/ O
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tp
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t