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 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

Siemens Building Technologies, Ltd.

2 Kenview Boulevard

Brampton, Ontario L6T 5E4 P/N 315-049692C-1

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