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
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