Siemens SLIM User manual
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
Siemens Building Technologies
Fire Safety
P/N 315-049692C-12
Figure 2
SLIM Wiring Diagram - Class B Installation
Class A Single Loop (See Figure 3) In Class A wiring the SLIMs are wired in series with the loop wiring.
This results in a single continuous loop. If any group in the loop has a short, that
group is lost and a Class A circuit failure results.
• The FS-250C displays the message “DLC Open” and “no response” for
devices in the groups on the loop that follow the short.
Figure 3
SLIM Wiring Diagram - Class A Installation (Single Loop)
1. All wiring must comply with
national and local codes.
2. In order to provide adequate
protection, it is recom-
mended that you do not
install more than 20 devices
on a single SLIM.
3. Minimum wire gauge is
18 AWG.
4. The total wire resistance
(both wires) between SLIMs
cannot exceed 20 ohms.
5. Do not install more than 15
SLIMs per FDLC loop.
6. All circuits are supervised.
7. Refer to FDLC Installation
Instructions, P/N 315-
447360FA or the FS-250C
Manual, P/N 315-049589C
for the list of compatible
devices, as applicable.
8. All terminals are power
limited.
1. All wiring must comply with
national and local codes.
2. In order to provide adequate
protection, it is recom-
mended that you do not
install more than 20 devices
on a single SLIM.
3. Minimum wire gauge is
18 AWG.
4. The total wire resistance
(both wires) between SLIMs
cannot exceed 20 ohms.
5. Do not install more than 15
SLIMs per FDLC loop.
6. All circuits are supervised.
7. Refer to FDLC Installation
Instructions, P/N 315-
447360FA or the FS-250C
Manual, P/N 315-049589C
for the list of compatible
devices, as applicable.
8. All terminals are power
limited.
ANALOG LOOP
LINE 1
LINE 2
IN IN OUT OUTIN IN OUT OUTIN IN OUT OUT
TO ANALOG
LOOP RETURN
INSIDE ENCLOSURE
TO ANALOG
LOOP FEED
LINE 1
LINE 2
LINE 2
LINE 1
IN IN OUT OUT
IN IN OUT OUT IN IN OUT OUT
ININ
OUTOUT
ININ
OUTOUT
ININ
OUTOUT
Siemens Building Technologies
Fire Safety
P/N 315-049692C-13
Figure 4
Mounting
Mechanical Installation (See Figure 4)
• 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.
• Connect the field wiring. Press the SLIM into the box and fasten the module
plate to the box.
• Cover the module front plate with the plate supplied and fasten with screws
supplied.
ELECTRICAL RATINGS Input power: 24 VDC, 1mA max
SWITCHPLATE
4-INCHES SQUARE
(SUPPLIED)
SWITCHPLATE
(SUPPLIED)
4-INCHES SQUARE
4-INCH SQUARE BOX
2 1/8-INCHES DEEP
DOUBLE GANG BOX
3 1/2-INCHES DEEP
SLIM
SLIM
Siemens Building Technologies, Ltd.
2 Kenview Boulevard
Brampton, Ontario L6T 5E4 P/N 315-049692C-1
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