Siemens HLIM Service manual

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P/N 315-034904-4

OPERATION The Model HLIM Loop Isolator Module from Siemens Industry, Inc. isolates short

circuits on FireFinder-XLS or FS-250 analog loops. By placing devices between HLIMs

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 HLIM oper-

ates in both Class A and Class B circuits.

A yellow LED flashes when a device detects a short circuit.The HLIM then isolates

that part of the loop. When the short is removed, the HLIM automatically restores the

loop to normal operation.The HLIM 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

INSTALLATION The HLIM 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 HLIM 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

HLIM-1 Module

Loop Isolator Module

Installation Instructions

Model HLIM

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 HLIM

pooLCLD-SF/CLD

tnerruC.xaMAm1

Figure 3

HLIM Wiring Diagram - Class B Installation

The HLIM may be used in two circuit configurations as follows:

Class B (See Figure 3) In Class B wiring each HLIM 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

HLIMs at the enclosure and run each branch independently.

Figure 4

HLIM 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 HLIM.

3. 18 AWG minimum, 14 AWG

maximum.

4. The total wire resistance

(both wires) between HLIMs

cannot exceed 20 ohms.

5. Do not install more than 15

HLIMs per DLC/FS-DLC

loop.

6. All circuits are supervised.

7. Refer to DLC Installation

Instructions, P/N 315-033090

or the FS-250 Manual, P/N

315-049353 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 HLIM.

3. 18 AWG minimum, 14 AWG

maximum.

4. The total wire resistance

(both wires) between HLIMs

cannot exceed 20 ohms.

5. Do not install more than 15

HLIMs per DLC/FS-DLC

loop.

6. All circuits are supervised.

7. Refer to DLC Installation

Instructions, P/N 315-033090

or the FS-250 Manual, P/N

315-049353 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 1

IN IN OUT OUT

ININ

OUTOUT

EARTH

ININ

OUTOUT

EARTH ININ

OUTOUT

EARTH

IN IN OUT OUT EARTH IN IN OUT OUT EARTH

Class A Single Loop (See Figure 4) In Class A wiring the HLIMs 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 FireFinder-XLS displays communication errors for the devices and a

Class A failure for the loop itself.

• The FS-250 displays the message “DLC Open” and “no response” for

devices in the groups on the loop that follow the short.

Siemens Industry, Inc.

Building Technologies Division

Florham Park, NJ

Siemens Building Technologies, Ltd.

Fire Safety & Security Products

2 Kenview Boulevard

Brampton, Ontario

L6T 5E4 Canada

P/N 315-034904-4

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