Centurion CP71, Installation Manual

Page: 22 / 40

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8.2.3 CLOSING BEAM OR LOOP INPUT
TO LOWER THE ARM REQUIRES A CLOSING SIGNAL.
THIS IS SUPPLIED BY EITHER A CLOSING BEAM OR
INDUCTIVE LOOP DETECTOR.
e.g.
N.B. THE CLOSING BEAM, OR LOOP, ALSO ACTS AS A SAFETY. THEREFORE
MOUNT BEAM OR LOOP DIRECTLY UNDER BARRIER ARM.
IR BEAM
TERMINAL
BLOCK ON
CHASSIS
PLATE
EXISTING WIRING
INSIDE BOOM
INDUCTIVE LOOP DETECTOR FITTED
TO CHASSIS PLATE INSIDE BOOM
ENCLOSURE PLUGGED INTO "SAFETY
LOOP" RELAY BASE.
1 2
3
4 5
6
C
O
M
+
1
2
V
( - )(+)
1 2
N/O
N/C
3 4 5
1 2
N/C
N/O
3 4 5 6 7 8
INDUCTIVE
LOOP
BEAM OR
LOOP
TWISTED
WIRE
LOOP UNDER
ROADWAY
OR
+12V
COM
IRB
TRANSMITTER RECEIVER
EXAMPLE 1
CENTURION BEAM
EXAMPLE 2
IR90-B BEAMS
+
1
2
V
C
O
M
+
1
2
V
N
E
G
(
0
V
)
N/O
N/C
C
O
M
COM
IRB
+12V