background image

P/N  315-049552-6

OPERATION

The Model LIM-1 Loop Isolator module from Siemens
Industry, Inc., isolates short circuits on MXL and
FireFinder-XLS intelligent device loops. By placing
devices between LIM-1s during installation, a short in
the wiring within that group is disconnected from the
rest of the loop. The remainder of the devices
continue to operate. The LIM-1 operates in both
Class A and Class B circuits.

A yellow LED flashes when a device detects a short
circuit. The LIM-1 then isolates that part of the loop.
When the short is removed, the LIM-1 automatically
restores the loop to normal operation. The LIM-1
does not have a loop address and therefore does not
require address programming nor does it reduce the
loop capacity below 60 (MXL) or 252 (XLS) devices.

ELECTRICAL RATINGS

Installation Instructions

MODEL LIM-1

Loop Isolator Module

Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ

Siemens Canada Limited
Building Technologies Division
2 Kenview Boulevard
Brampton, Ontario L6T 5E4 Canada

INSTALLATION

Remove all system power before installation, first
the battery and then the AC.

Refer to Figure 1 for the location and number of  the
screw terminals on the LIM-1. The LIM-1 has two
input terminals, two output terminals and an earth
ground as listed below:

    

 Terminal Number

Description

1

Loop + IN

2

Loop - IN

3

Loop + OUT

4

Loop - OUT

5

Earth Ground

MECHANICAL INSTALLATION (See Figure 2)

1.

Use a standard 3 

1

/

2

-inch deep, double gang

electrical switchbox or a 4-inch square electrical
box that is 2 

1

/

8

 inches deep.

2.

Connect the field wiring. Press the LIM-1 into the
box and fasten the module plate to the box.

3.

Cover the module front plate with the plate
supplied and fasten with screws supplied.

Figure 2

Mounting the LIM-1

Figure 1

Model LIM-1

SWITCHPLATE

5-INCHES SQUARE

(SUPPLIED)

SWITCHPLATE

5-INCHES SQUARE

(SUPPLIED)

4-INCH SQUARE BOX

2 1/8-INCHES DEEP

DOUBLE GANG BOX

3 1/2-INCHES DEEP

t

n

e

r

r

u

C

e

l

u

d

o

M

C

D

V

5

e

v

i

t

c

A

A

m

0

t

n

e

r

r

u

C

e

l

u

d

o

M

C

D

V

4

2

e

v

i

t

c

A

A

u

0

6

7

t

n

e

r

r

u

C

e

l

u

d

o

M

C

D

V

4

2

y

b

d

n

a

t

S

A

u

0

6

7

Отзывы: