Siemens Building Technologies
Fire Safety
P/N 315-049692C-1
OPERATION
The Model SLIM Loop Isolator Module from Siemens Building Technologies, Ltd.
isolates short circuits on FS-250C analog loops. By placing devices between SLIMs
during installation, a short in the wiring within that group is disconnected from the
Figure 1
The SLIM-1 Loop Isolator Module
the loop to normal operation. The SLIM does not have a loop address and therefore
does not require address programming nor does it reduce the loop capacity below
252 devices.
Remove all system power before installation, first the battery and then the AC.
INSTALLATION
The SLIM is a polarity insensitive module. Refer to Figure 1 for the location of the two
input terminals and two output terminals. Line 1 and Line 2 can be either line of the
loop.
The SLIM may be used in two circuit configurations as follows:
Class B
(See Figure 2) In Class B wiring each SLIM isolates a branch on the circuit. Note that
a short on the main branch causes the entire loop to fail. To prevent this, mount the
SLIMs at the enclosure and run each branch independently.
rest of the loop. The
remainder of the devices
continue to operate. The
SLIM operates in both
Class A and Class B
circuits.
A yellow LED flashes
when a device detects a
short circuit. The SLIM
then isolates that part of
the loop. When the short
is removed, the SLIM
automatically restores
FRONT
BACK
FAULT
IN - LINE 1
IN - LINE 2
OUT - LINE 1
OUT - LINE 2
Loop Isolator Module
Installation Instructions
Model SLIM
