Bosch 420 User Manual

2 | FLM‑I 420‑S Short Circuit Isolator

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

LS

N

LSN 

1

Fire panel

I, II, III

Floors

b1+

b1+

b1+

b1+

a-

a-

a-

a-

b2+

b2+

b2+

b2+

FLM-I 420-S

FLM-I 420-S

1

LSN

LSN

1

Alarm zone / device group with LSN elements

Complies with EN54-17:2005

Germany

VdS

G 207045   FLM-I 420-S; FLM-I 420-D

•

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.

1

Short Circuit Isolator with surface-mounted housing.

1

DIN rail adapter

Alternatively to the use of the surface-
mounted housing, the Isolator can be
mounted on a DIN rail with the included
adapter.

Input voltage

15 V DC to 33 V DC

Max. current consumption

•

During initialization

< 0.4 mA

•

Following the initializa-

tion

< 0.25 mA

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)