System Sensor PF24 User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

I56-2600-02R

3825 Ohio Avenue, St. Charles, Illinois 60174

PF24 Directional Sounder

1-800-SENSOR2, FAX: 630-377-6495

www.systemsensor.com

Specifications

Mechanical

Input terminals: 12 – 24 AWG Sounder size: 4 inches (101mm) Grille Size: 4 7/8″ (127mm)

Electrical

Voltage Input: Regulated 24 Volts Operation Voltage Range: 16 to 33 Volts Operating Humidity Range: 10% to 93% relative humidity non-condensing Frequency range: 20 Hz to 20 kHz Operating Temperature range: 32° to 120°F (0° to 49°C) Power:

/4″, 1/2″, 1, 2 and 4 Watts, selectable Listings: UL 464 Directional Sounder, supplemental notification appliance NOTICE: This manual should be left with the owner/user of the equipment.

General Description

Before installing, please read the Directional Sound Applications Guide, available through System Sensor. The installation must meet the requirements of the authority having jurisdiction. Directional sounders are used as supplemental signals on a fire alarm system to aid in the evacuation of building occupants. Although directional sounders may be connected to notification appliance circuits (NAC) for fire alarm service, they are not a replacement for audible or visible notification appliances as required by the

Power Supply Considerations for Directional Sounders

Panels typically supply DC filtered voltage or FWR (fullwave rectified) voltage. This device is only compatible with DC filtered supplies and must not be used with panel supplies that are FWR. Be certain the sum of all the device currents do not exceed the current capability of the panel power supply. Calculations are based on using the device current found in Table 1 and must be the current specified for the installed settings of the device.

authority having jurisdiction.

Wire Sizes

The directional sounder can be installed in systems using 24 Volt DC regulated power supplies only. It is not approved for use with FWR unregulated power supplies.

The last device on the circuit must have sufficient voltage to operate the device within its rated voltage range. When calculating the voltage available to the last device, it is necessary to consider the voltage drop due to the resistance of

Directional sound is a broadband, multi-frequency sound. The sound source is easily and quickly located by building occupants, making it ideal for rapid building evacuation. The Sounder incorporates four different pulse patterns. The patterns consist of pulses of broadband noise. The four

the wire. The thicker the wire, the less the voltage drop. Generally, for purposes of determining the wire size necessary for the system, it is best to consider all of the devices as “lumped” on the end of the supply circuit (simulates “worst case”).

patterns can be used to create an egress pathway out of a building. The sound pattern becomes faster as the building occupant approaches the perimeter exit. Three additional tone pulses can be added to each of the four pulse patterns. The first two tone pulses are used to alert occupants that they are approaching a stairway and need to proceed either

Typical wire size resistance: 18 AWG solid: Approximately 8 ohms/1,000 ft. 16 AWG solid: Approximately 5 ohms/1,000 ft. 14 AWG solid: Approximately 3 ohms/1,000 ft.

12 AWG solid: Approximately 2 ohms/1,000 ft. up or down. The second tone pulse is a special tone used to identify areas of refuge.

Example: Assume you have 10 devices on a zone and each

requires 50mA average and 2000 ft. of 14 AWG wiring (total

length = outgoing + return). The voltage at the end of the

loop is 0.050 Amps per device

× 10 devices × 3 ohms/1000

ft. × 2000 ft. = 3 volts drop.

D550-10-00 1 I56-2600-02R

The same number of devices using 12 AWG wire will produce only a 2 volt drop. The same number of devices using 18 AWG wire will produce an 8 volt drop. Consult your panel manufacturer’s specifications, as well as the sounder’s operating voltage to determine the acceptable voltage drop.

NOTE: If class “A” wiring is installed the wire length may

be up to 4 times the single wire length in this calculation.

Table 1: Current Draw Measurements and Sound Output Guide

Maximum DC

Speed Selection

Switch

Selection

FAST (exit) 10 4 Watt 225 85 78

FAST (exit) 10 2 Watt 114 82 76

FAST (exit) 10 1 Watt 75 79 73

FAST (exit) 10

MED1 9 4 Watt 221 85 77

MED1 9 2 Watt 112 82 74

MED1 9 1 Watt 74 79 71

MED1 9

MED2 8 4 Watt 203 85 78

MED2 8 2 Watt 103 82 75

MED2 8 1 Watt 68 79 73

MED2 8

SLOW 7 4 Watt 189 85 76

SLOW 7 2 Watt 96 82 73

SLOW 7 1 Watt 63 79 70

SLOW 7

Power

Setting

/2 Watt 62 76 69

/4 Watt 49 73 66

/2 Watt 61 76 68

/4 Watt 48 73 65

/2 Watt 56 76 69

/4 Watt 44 73 66

/2 Watt 52 76 67

/4 Watt 41 73 64

Operating

Current

(mA RMS)

(16 to 33V)

Audibility

(dBA) (16 to

33V)

Note 1

Audibility

(dBA) (16 to

33V)

Note 2Speed

NOTE 1: Sound output measured in anechoic room at 10 feet. NOTE 2: Sound output measured in a reverberant room at 10 feet.

more than one switch is selected the sounder will default to the fastest selected setting.

Switch positions 5 and 6 are used to select additional tone pulses that can be inserted in between bursts of the directional sound pulses. The additional tone pulse will be inserted on every 6th directional sound pulse. These switches should be used when the sounder will be placed near a stairway to guide a building occupant up or down the stairs. Switch setting 5 inserts a down sweep indicat ing the presence of a downward stairway. Switch setting 6 inserts an up sweep indicating the presence of an upward stairway. If switch positions 5 and 6 are both set to “on” this will insert a special tone for use near areas of refuge. The area of refuge tone should be used if the directional sounder is marking an area of refuge. This tone provides a distinct signal indicating that the sounder is not marking an exit. If both switches are set to “off” the sounder will default to no additional tones. In this case only the directional sound pulses will be heard. See Table 2 for tone selection options.

Table 2: Additional Tone Selection Guide

Switch

Position 5

Setting

on on Refuge

on off DOWN Stairs

off on UP Stairs

off off no tones

Switch

Position 6

Setting

Sound Output

Switch setting 4 enables a directional sound device to become disabled when used in conjunction with devices with dry contacts such as heat sensors or control modules. The sounder has a set of input terminals that can be configured for an “active open” or “active closed” state. When the switch is in the “on” position, the sounder is “on” when the disable connection is closed. When the switch is in the “off” position, the sounder is “on” when the disable connection is open. See Table 3 for operation modes.

Installation

Consult the Directional Sound Applications Guide for information regarding the appropriate mounting locations of directional sounders.

Switch Settings

Selections are made via DIP switches on the back of

Table 3: Enable/Disable Function Logic Table

Switch

Position 4

Setting

on open disabled

on closed enabled

off open enabled

off closed disabled

Terminals 3

& 4

Sound Output

the sounder. Switch positions 7-10 are used to select the pulse pattern of the sounder. Switch 10 is used to mark the perimeter exit locations (fastest pulse). The remaining settings are used for egress routing to the perimeter exit. The egress route would originate with the “slow” (switch

7) tone and follow “medium 2” (switch 8) to “medium 1” (switch 9) and finally the exit point “fast” (switch 10). If

D550-10-00 2 I56-2600-02R

There are five different power settings for the sound output pressure. Switch settings 1, 2, and 3 set the power setting for the sounder. Switch 1 selects the 2 watt setting, switch 2 selects the 1 watt setting, switch 3 selects the 1/2 watt setting. If all three switches are “off” this selects the 4 watt setting and if all three switches are “on” this selects the 1/4 watt setting.

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