Page 4
FLX-PC
®
Vacuum / Pressure Controller
Operation Manual
FM-060M-0-84B
Electrical Wiring
The electrical connections to the
FLX-PC
®
unit are rooted to
the release control panel via a built-in junction box and
connected at the factory.
Connections to the
FLX-PC
®
unit allow powering the unit, the
connection among other devices of the system, the
transmission of alarm, supervisory and trouble control signals
towards the release control panel and ultimately control of
the vacuum pump.
The
FLX-PC
®
unit is powered via a non-resettable power
source from the release control panel. Alarm, supervisory
and trouble signals are connected to the release control
panel through dry contacts of the
FLX-PC
®
unit. Control
contacts of the system come from the devices of the fire
protection system. The vacuum pump control is made via a
24VDC isolation relay whose contacts activate the contactor
that controls the vacuum pump.
The connections are all done via the connections of terminals
P1, P2 and P3 jacks. These jacks are spring-loaded and can
accept only a single wire. Terminals P2 and P3 are thus
redundant in order to not allow connection of more than one
wire in the same jack.
20
19
P3
22
21
24
23
25 26 27
11
10
P2
13
12
15
14
16 17 18
2
1
P1
4
3
6
5
7
8
9
M
A
IN
V
L
A
V
E
D
E
LU
G
E
V
A
LV
E
O
P
E
N
IN
G
+
2
4V
D
C
C
O
M
V
A
C
U
U
M
P
IU
M
P
S
T
A
R
T
/S
T
O
P
20
19
P3
22
21
24
23
25 26 27
11
10
P2
13
12
15
14
16 17 18
EOLR
EOLR
H
IG
H
P
R
E
S
S
U
R
E
A
L
A
R
M
LO
W
P
R
E
S
S
U
R
E
S
U
P
E
R
V
IS
O
R
Y
H
IG
H
P
R
E
S
S
U
R
E
S
U
P
E
R
V
IS
O
R
Y
T
R
O
U
B
LE
A
L
A
R
M
S
U
P
E
R
V
IS
O
R
Y
TYPICAL WIRING TOWARDS AN ALARM
CIRCUIT AND A SUPERVISORY CIRCUIT
FM-061H-2-9A
EXTERNAL CONNECTIONS
E
X
T
E
R
N
A
L
C
O
N
N
E
C
T
IO
N
S
ALARM
EOLR
SUPERVISORY
EOLR
LOW
PRESSURE
ALARM
HIGH
PRESSURE
TROUBLE
EQUIVALENT CIRCUIT
Figure 2 - Wiring diagrams
