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2 | FLM‑I 420‑S Short Circuit Isolator
Wiring example: Isolation of separate floors
1
LSN2
LSN1
a-
a-
b+
b+
b1+
b1+
b1+
a-
a-a-
b2+b2+b2+
III
FLM-I 420-S
FLM-I 420-S
FLM-I 420-S
II
I
LSN
LSN
Pos. Description
1 Fire panel
I, II, III Floors
Typical wiring in a T‑Tap
b1+
b1+b1+
b1+
a-
a-a-a-
b2+
b2+b2+
b2+
FLM-I 420-SFLM-I 420-S
1
LSN
LSN
Pos. Description
1 Alarm zone / device group with LSN elements
Certifications and Approvals
Complies with EN54-17:2005
Region Certification
Germany VdS G 207045 FLM-I 420-S; FLM-I 420-D
Installation/Configuration Notes
•
National standards and guidelines must be taken into
account during the planning stage.
•
The surface-mounted housing has two cable ducts on
opposite sides:
-
2 x 2 pre-punched for diameter up to 21 mm/to
34 mm (for conduits)
-
2 x 4 rubber bushes for inserting cables with
diameters of up to 8 mm.
•
In addition, there are cable ducts on the base of the
surface-mounted housing:
-
1 x pre-punched cable ducts for diameter up to
21 mm (for conduits)
-
2 x 4 rubber bushes for inserting cables with
diameters of up to 8 mm.
•
Connectable to the fire panels FPA‑5000 Modular and
FPA‑1200 with LSN technology improved version.
Parts Included
Qty. Components
1 Short Circuit Isolator with surface-mounted housing.
1 DIN rail adapter
Note Alternatively to the use of the surface-
mounted housing, the Isolator can be
mounted on a DIN rail with the included
adapter.
Technical Specifications
Electrical
Input voltage 15 V DC to 33 V DC
Max. current consumption
•
During initialization
< 0.4 mA
•
Following the initializa-
tion
< 0.25 mA
Mechanics
LSN/Address setting 3 rotary switches for
•
Mode LSN classic or LSN improved
version
•
Automatic or manual addressing
Connections 6 threaded clamps
Housing material
•
Isolator module
PPO (Noryl)
•
Surface-mount hous-
ing
ABS/PC-Blend
Housing color
•
Isolator module
Off-white, similar to RAL 9002
•
Surface-mount hous-
ing
Signal white, RAL 9003
Dimensions Approx. 126 x 126 x 71 mm
(4.96 x 4.96 x 2.8 in.)
Weight Approx. 150 g (5.3 ounces)