Simplex 4903 User manual

4903 TrueAlertCeiling-Mount A/V
Installation Instructions
2000 Simplex Time Recorder Co., Westminster, MA 01441-0001 USA
All specifications and other information shown were current as of publication, and are subject to change without notice.
TrueAlert is a trademark of Simplex Time Recorder Company.
Suffix “C” or “CA” following an eight-digit product ID number denotes ULC-listed product.
574-929
Rev. B
Cautions and Warnings
DO NOT INSTALL ANY SIMPLEX PRODUCT THAT APPEARS DAMAGED. Upon unpacking your Simplex product, inspect
the contents of the carton for shipping damage. If damage is apparent, immediately file a claim with the carrier and notify Simplex.
ELECTRICAL HAZARD -Disconnect electrical power when making any internal adjustments or repairs.
Servicing should be performed by qualified Simplex Representatives.
STATIC HAZARD -Static electricity can damage components. Therefore, handle as follows:
1. Ground yourself before opening or installing components.
2. Keep uninstalled component wrapped in anti-static material at all times (use the 553-484 Static Control Kit).
RADIO FREQUENCY ENERGY -This equipment generates, uses, and can radiate radio frequency energy and
if not installed and used in accordance with the instruction manual, may cause interference to radio
communications. It has been tested and found to comply with the limits for a Class A computing device pursuant
to Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such
interference when operated in a commercial environment. Operation of this equipment in a residential area may
cause interference in which case the user, at his own expense, will be required to take whatever measures may be
required to correct the interference.
TrueAlertCeiling-Mount A/V Operation
The 4903 TrueAlert Audible/Visible (A/V) unit (see Figure 1) is a
ceiling-mount notification appliance that provides an audible and/or visible
warning indication of an alarm condition when activated from a TrueAlert-
compatible control panel of a UL-listed Simplex Fire Alarm System. When the
notification appliance emits sound and/or light, it indicates the possibility of
an emergency situation that requires your immediate attention.
The TrueAlert A/V unit is a notification appliance that operates only on a
TrueAlert-compatible Signaling Line Circuit (SLC). The appliance is
supervised via communications with the TrueAlert Addressable Controller
(rather than via conventional appliance supervision).
The Ceiling-Mount TrueAlert A/V unit responds to communication signals over the circuit from a TrueAlert-compatible
panel. Coded messages from the TrueAlert Addressable Controller turn on the A/V strobe and horn. The Strobe can
only be operated through a 4009-9401 TrueAlert Addressable Controller using Simplex TrueAlert Comm Channel
communications. The appliance is supervised via communications with the TrueAlert controller (rather than via
conventional current flow supervision).
The A/V horn provides selectable high/low volume sound pressure levels with audible output types of Steady, Temporal, and
March Time (fast/slow). The compatible 4009 TrueAlert Addressable Controller or FACP is used to configure the features.
Note: The TrueAlert Ceiling-Mount A/V will not operate on a conventional NAC.
TrueAlert ceiling-mount A/Vs are available rated at 15 candela, 75 candela, and 110 candela. Table 1 lists the available
ceiling-mount A/V models.
Table 1. Ceiling-Mount TrueAlert A/V Models
Description Model Cover Color
Ceiling-Mount A/V 15 CANDELA 4903-9459
Ceiling-Mount A/V 75 CANDELA 4903-9460
Ceiling-Mount A/V 110 CANDELA 4903-9461
White
Figure 1. TrueAlert Ceiling-Mount A/V
firealarmresources.com

2
TrueAlert Ceiling-Mount A/V Wiring
Warning: Make sure that all electrical power is disconnected before starting the installation.
Caution: Connect wiring to terminals as shown. Do not loop wires under terminals. Break wire runs to provide
supervision of connections. Do not bring conduit through the rear of the electrical box. Strip lead insulation to
a maximum of 3/8-inch.
1. At the electrical box, connect the wires to the CKT + and CKT - terminals at the rear of the A/V unit. Torque terminal
block screws 12-15 in/lbs. to ensure proper continuity. See Figure 2.
2. Ensure that correct polarity is maintained for each A/V unit.
3. SLC wiring must be twisted pair (TWP).
4903
A/V
4903
A/V
4903
A/V
SLC -
CKT
SLC +
SLC -
SLC+
SLC -
SLC +
-+
CKT
-+
CKT
-+
SLC -
SLC +
SLC -
SLC+
Class A Wiring (See Notes)
4903
A/V
12
4903
A/V
12
4903
A/V
12
4903
A/V
12
SLC -
SLC +
SLC -
SLC +
SLC -
SLC +
SLC -
CKT1- + CKT1- + CKT1- + CKT1-+
SLC +
Class B Wiring (See Notes)
Notes:
1. Maximum 43 appliances per circuit. Maximum 30 ohms wire resistance between appliances. Refer to Field Wiring Diagrams of the driving
TrueAlert compatible Fire Alarm Control Panel for further instructions.
2. Notification appliances are rated per individual nameplate label.
3. Maintain correct polarity on terminal connections. Do not loop wires under terminals.
4. All TrueAlert SLC wiring connections are supervised and power-limited.
5. These appliances were only tested to the operating voltage limits of 17V to 31V. Do not operate these appliances outside these limits: doing so
may cause appliance to fail to operate as intended, and/or cause permanent damage to this equipment.
6. The TrueAlert A/V can only be operated through a 4009 TrueAlert Addressable Controller or TrueAlert-compatible FACP.
7. T-tapping is not allowed for Class A wiring.
Figure 2. TrueAlert Ceiling-Mount A/V Wiring
FROM TrueAlert-COMPATIBLE
SLC CONTROLLER
(SEE NOTES)
CKT TERMINALS ACCEPT
2 WIRES: #12 –18 AWG TWP
(SEE NOTE 3)
FROM TrueAlert-COMPATIBLE
SLC CONTROLLER
(SEE NOTES)
TO NEXT APPLIANCE OR
TrueAlert-COMPATIBLE SLC
CONTROLLER
(SEE NOTES)
CKT - INPUT
CKT + INPUT
ADDRESS SWITCH
(SW1)
firealarmresources.com

3
Mounting the TrueAlert Ceiling-Mount A/V
See Figure 3 for mounting the TrueAlert ceiling-mount A/V to the enclosure box.
Caution: Do not bring conduit through the rear of the electrical box.
1. Tighten mounting screws snugly (do not overtighten). Torque mounting screws 5-7 in/lbs.
2. For flush mounting, install the box either flush with the ceiling or with a maximum ¼-inch recess.
Notes:
1. The TrueAlert Ceiling-Mount A/V attaches directly to a 4-inch square electrical box (not supplied), semi-flush or surface mounted. Ensure
correct orientation of the box in relation to the location of the mounting screws and the A/V’s position.
2. For installation in a concrete or plaster ceiling, flush-mount the box (with a ¼-inch recess, maximum).
3. For installation in a suspended ceiling, use a suitable tile bridge that rests on tile to support the box.
4. Address Switch SW1 is accessible with the Ceiling-Mount A/V removed.
Figure 3. TrueAlert Ceiling-Mount A/V Mounting
2 SCREW HOLES FOR
4-INCH SQUARE MOUNTING
(SEE NOTES)
4-INCH SQUARE
ELECTRICAL BOX
NOT SUPPLIED
(3”DEEP REQUIRED)
(SEE NOTES)
SCREWS FROM 748-472
SHIP GROUP QTY: 2
(MOUNT SCREWS
CROSS-CORNER)
TrueAlert CEILING-
MOUNT A/V
COVER
DIP SWITCH SW1
(SEE NOTE 4)
firealarmresources.com

4
Setting the Ceiling-Mount A/V Address
Each TrueAlert notification appliance has a unique address. Each appliance’s address is set via an eight-position DIP
switch, as shown in Table 2 (see Figure 3 for the general DIP switch location). DIP switch position 1 is the least
significant bit (LSB) and position 8 is the most significant bit (MSB).
Note: DIP Switches 1 through 6 are used to set the possible 63 address codes. DIP Switches 7 and 8 are not used and
are set to “OFF.”
Use a small screwdriver or pen to set the switches, and then record the address. This information provides an aid in
troubleshooting the system.
Table 2. TrueAlert Ceiling-Mount A/V Units – DIP Switch Address Chart
0000 1000 0100 1100
0000 0 163248
1000 1 173349
0100 2 183450
1100 3 193551
0010 4 203652
1010 5 213753
0110 6 223854
1110 7 233955
0001 8 244056
1001 9 254157
0101 10 26 42 58
1101 11 27 43 59
0011 12 28 44 60
1011 13 29 45 61
0111 14 30 46 62
15 31 47 63
LSB MSB
12345678
1111
DIP SWITCHES 5 AND 6
DIP
SWITCHES
1 THRU 4
RESERVED FOR
FUTURE USE
NOT USED
ON
OFF
1 = ON 0 = OFF
DIP SWITCH SHOWN IS
SET AT ADDRESS 7.
Ceiling-Mount A/V Magnetic Test
Note: The TrueAlert Addressable Controller must be configured to support the
Ceiling-Mount A/V diagnostic testing.
Position magnet tester 553-810 to the bottom right side of the A/V cover near
the LED indicator (see Figure 4). Hold the magnet tester in place for a
minimum of two seconds or until the LED begins flashing.
In response to the magnetic test, the A/V LED emits one long flash denoting the
test acknowledge signal, and then another long flash denoting the first digit
(always zero) of the appliance address. The LED then flashes one to six times to
denote the second digit of the address, pauses, and then flashes one to nine times
to indicate the third digit of the address. One long flash always indicates a zero.
After the A/V LED flashes its address, the A/V goes into alarm (real appliance
test) or the LED illuminates (silent appliance test) for 2 to 3 seconds.
Important: Refer to the TrueAlert Addressable Controller Installation
Guide(574-762) for detailed information on appliance
diagnostic testing.
Figure 4. Appliance Magnet Test
MAGNET
TESTER
LOCATION
A/V LED
firealarmresources.com

5
Current and Sound Pressure Measurements
Refer to Table 3 for current rating information.
Table 3. TrueAlert Ceiling-Mount A/V Units –Current Rating Chart
Candela Input (Vrms) In-Rush (V mA
)
Peak (mA) Nominal Avg. (mA rms)
17 107
24 93
15
31
210 210
91
17 253
24 194
75
31
400 400
169
17 337
24 238
High Volume
Setting
via
Addressable
Controller
(See Note 3)
110
31
520 520
190
17 102
24 88
15
31
210 210
83
17 248
24 189
75
31
400 400
161
17 332
24 233
Low Volume
Setting
via
Addressable
Controller
(See Note 3)
110
31
520 520
182
Supervision Current: 1 TrueAlert Unit Load. Current is measured with the horn steady on.
Refer to Table 4 for sound pressure measurements at high and low volume settings.
Table 4. TrueAlert Ceiling-Mount A/V Units –Sound Pressure Level Measurements
Sound Pressure Level
Measurement (dBA)
Voltage
(Vrms)
Horn
Mode
(See Note 1)
Reverberant Room
at Ten Feet Per UL464
(See Note 2)
Steady 84.6
Coded 80.6
Steady 86.3
Coded 82.4
Steady 88.4
High Volume
Setting
via
Addressable
Controller
(See Note 3) Coded 84.5
Steady 79.1
Coded 75.5
Steady 81.5
Coded 77.2
Steady 84.3
Low Volume
Setting
via
Addressable
Controller
(See Note 3) Coded 79.2
Notes:
1. The coded category includes both Temporal and March Time cadences.
2. Reverberant dBA measurements are a minimum UL rating based on sound power level measurements made in UL’s reverberant test chamber.
3. High and low volume settings are configured with DIP Switch SW4 on the TrueAlert Addressable Controller.
24
(Nominal)
31
(Maximum)
17
(
Minimum
)
21
(Nominal)
31
(Maximum)
17
(
Minimum
)
firealarmresources.com

574-929
Rev. B
Limitations, Safety and Placement of Notification Appliances
Notification appliances, and the fire alarm system itself, have certain limitations and requirements for safety, placement,
installation, and test. Since you must know the limitations and adhere to the requirements, keep these instructions at a
central location for future reference so that all people who use, maintain, and test the fire alarm system have access to
this information.
Limitations
Notification appliances do not sense any hazardous conditions such as smoke, fire, explosion, etc.; they are activated
by a control panel as part of a system that does sense such conditions.
Notification appliances do not provide their own power. They receive their power from the fire alarm system. If
power is not supplied to the notification appliances (for whatever reason), the notification appliances will not provide an
audible/visible warning. THEREFORE, BACK-UP POWER SUPPLIES, OR OTHER BACK-UP POWER SOURCES,
ARE REQUIRED FOR THE FIRE ALARM SYSTEM.
Notification appliances provide a specific rated output level of sound or light. The output level must meet the
requirements of the intended protected area(s). Although the 4903 TrueAlert Ceiling-Mount A/V notification appliances
meet the current UL standards for sound output and light intensity, the protected area(s) may have walls, doors, carpeting,
furniture, insulation, or other obstacles that reduce or even block the sound and/or light. For all applications, the sound
and light output must provide enough intensity to alert all occupants of the protected area(s) including those occupants
that are sleeping or hearing impaired for whatever reason. If these occupants cannot hear and/or see the effect of the
notification appliances within the protected area(s), you must increase the intensity of the sound/light output or add
additional notification appliances so that the occupants can hear an/or see the effect of the notification appliances when
activated. Refer to National Fire Protection Association (NFPA) National Fire Alarm Code 72, Chapter 4.
Notification appliances are not a substitute for insurance coverage. All users should have adequate levels of life and
property insurance.
Safety
Always install, maintain, and test notification appliances within their specifications. Failure to follow all safety
precautions and instructions may result in loss of life and property due to non-functioning notification appliances.
Some notification appliances use high voltage. To avoid electrical hazards and avoid damage to appliances, make sure
that the electrical power for the notification appliance circuit is disconnected at the control panel before installing,
repairing, or internally adjusting any notification appliances.
Even with electrical power removed, some notification appliances (such as visible strobes) store a high voltage charge.
The high voltage can cause injury resulting in death from electrical shock. DO NOT TOUCH EXPOSED CIRCUITRY.
Placement
The placement of notification appliances must conform to:
• Latest NFPA standards and guidelines (Refer to National Fire Alarm Code 72, Chapter 4)
• Sound (Sound Pressure Level) and/or Light Intensity Analysis of Intended Protected Areas
• Local Authority Having Jurisdiction (AHJ) Requirements
Notification appliances are not intended for installation within hazardous locations as defined by the National Electrical
Code (NEC) or the NFPA. Contact Simplex for information on explosion-proof notification appliances designed for
hazardous environments.
firealarmresources.com