Siemens SLIM User manual

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P/N 315-034904C-3
OPERATION The Model SLIM Loop Isolator Module from Siemens Industry, Inc. isolates short
circuits on FS-250C analog loops. By placing devices between SLIMs during installa-
tion, 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 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
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.
ELECTRICAL RATINGS Voltage: 24 Vdc
Current: 1mA max
INSTALLATION The SLIM is a polarity insensitive module. Refer to Figure 1 for the location of the
two input terminals, two output terminals and earth ground. Line 1 and Line 2 can be
either line of the loop.
Terminal Number Description
1 In — Line 1
2 In — Line 2
3 Out — Line 1
4 Out — Line 2
5 Earth Ground
Mechanical Installation (See Figure 2)
• 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.
Figure 1
SLIM-1 Module
Loop Isolator Module
Installation Instructions
Model SLIM
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
Figure 2
Mounting the SLIM

Figure 3
SLIM Wiring Diagram - Class B Installation
The SLIM may be used in two circuit configurations as follows:
Class B (See Figure 3) 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.
Figure 4
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 the FS-250C
Manual, P/N 315-049589C
for the list of compatible
devices.
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 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 EARTH EARTH EARTH
TO ANALOG
LOOP RETURN
INSIDE ENCLOSURE
TO ANALOG
LOOP FEED
LINE 1
LINE 2
LINE 2
LINE 1
IN IN OUT OUT
ININ
OUTOUT
EARTH
EARTH
ININ
OUTOUT
EARTH ININ
OUTOUT
EARTH
IN IN OUT OUT EARTH IN IN OUT OUT EARTH
Siemens Canada Limited
Building Technologies Division
2 Kenview Boulevard
Brampton, Ontario L6T 5E4 Canada
P/N 315-034904C-3
Class A Single Loop (See Figure 4) IIn 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.