56
Figure 34
Quad SLC Loop Adder Module Terminal Connections - Class X
Notes:
• All power limited circuits must use type FPL, FPLR, or FPLP power limited cable.
• Isolators need to be close nipple connected to the device being protected.
• Loop wiring: maximum loop resistance is 40 ohms total. These lines are power-limited and
fully supervised.
LEGEND
Addressable Smoke
Sensor with Isolator Base
Addressable Thermal
Sensor with Isolator Base
Conventional Smoke Sensor
Addressable Manual Pull Station
Fault Isolator Module
Conventional Heat Sensors
and Manual Pull Stations
F
C
s
F
ADDRESSABLE
THERMAL SENSOR
WITH ISOLATOR
BASE
ADDRESSABLE
SMOKE DETECTOR
WITH ISOLATOR
BASE
F
C
s
Addressable Monitor Module
(Wire Class B only)
H
S
S
H
TWISTED PAIR WIRE
TWISTED PAIR WIRE
TWISTED PAIR WIRE
TWISTED PAIR WIRE
I
I
I
I
I
I
I
I
M
M
I
CLASS X: For Class X operation use isolator
bases for the detectors and use isolator modules
(front and back as shown in this diagram) for the
addressable pull stations, monitor modules, and
control modules
TWISTED SHIELDED PAIR WIRE IS
NOT RECOMMENDED. IF USED THE
SHIELD SHOULD BE TERMINATED AT
THE TERMINALS MARKED SHIELD
ANALOG
LOOP 2
B
A
ANALOG
LOOP 1
+
-
+
-
S
S
B
A
+
-
+
-
ANALOG
LOOP 4
B
A
ANALOG
LOOP 3
+
-
+
-
S
S
B
A
+
-
+
-
ALCN-960 MISO or ALCN-4792MISO
QUAD LOOP ADDER MODULE
ALCN-960D or ALCN-792D
DAUGHTER BOARD
The ALCN-960D is mounted over the ALCN-960MISO
Quad Loop Adder board to provide four SLC loops total.
The ALCN-792D board is mounted over the ALCN-4792MISO
Quad Loop Adder board to provide four SLC loops total.
Wire loops 3 and 4 in the same manner as loops 1 and 2.
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