Digital Monitoring Products 521LX Installation

INSTALLATION
Description
The Model 521LX and 521LXT Smoke Detectors are the
industry's finest smoke detectors with analog features such
as remote maintenance reporting (CleanMe
compensation, and multi-criteria detection. These smoke
detectors incorporate an addressable single point module
for connection to the LX-Bus
™
Processor Panel with firmware version 1.04 (6/11/98) or
higher. The 521LXT also includes multi-criteria fast response
heat sensor algorithms for detection of a broad range of
fires.
Single Point Addressable
The 521 incorporates a factory mounted, addressable
single point zone expander on the back of the smoke
detector. The included 4-wire harness allows a direct
connection to the LX-Bus of an XR200 panel . The integrated
zone expander reports smoke detector alarm and service
conditions to the panel as a single zone. Also included is a
TXD LED that flashes when data is sent to the XR200
panel.
Figure 1
Black (common)
Green (data)
Yellow (data)
Red (Smoke
power)
XR200 LX-Bus
Requires Model 462N,
462P, 472, or 481
Interface Cards.
521 Power and Data Bus Wiring
™
CleanMe Remote Maintenance/Trouble
Reporting Feature
The 521 detectors have a unique feature that allows a
service signal to be sent to the XR200 when the smoke
detector has drifted outside UL sensitivity ranges or a
hardware fault exists. In most cases, the signal will be the
result of the detector becoming dirty over time and, as a
result, are over sensitive. This condition could result in a
false alarm. The CleanMe
receive a service signal allowing an installer time to clean
the detector by replacing the inexpensive optical chamber
with a new one (DMP Model 525). This service information
can be transmitted to the Central Station.
™
CleanMe is a trademark of Sentrol, Inc.
2841 E. Industrial Drive Springfield, MO 65802-6310 800-641-4282
521LX and LXT Addressable Smoke Detectors
™
), drift
™
of an XR200 Command
J7
0 0
tens ones
J4
J1
TXD
Bottom view
™ signal enables the XR200 to
U L
R
LISTED
Self-Diagnostics with Automatic Sensitivity
Testing
Each 521 photoelectric smoke detector monitors its own
sensitivity and operational status. Once a day, and
immediately upon first power up, it performs a full diagnostic
test that includes a dynamic test of the sensing chamber
and internal electronics. If the detector drifts out of its
sensitivity range or fails internal diagnostics, the alarm LED
flashes once every second to indicate trouble. This meets
NFPA 72 field sensitivity testing requirements without the
need for external meters.
Drift Compensation Built-In
The 521 detector is the industry's first addressable smoke
detector with built-in drift compensation. The 521
automatically adjusts sensitivity, up to a maximum of 1.0%/
ft., as it becomes dirty. This feature increases immunity to
dust and dirt by 30-50%.
Installation
Consult Local Authority Having Jurisdiction (AHJ) and
NFPA 72 for specific installation information regarding
smoke detector spacing, placement, and special
applications.
The 521 detectors wire directly to the XR200 panel 4-wire
™
LX-Bus . See Compatible LX-Bus Interface Cards. When
wired to the panel LX-Bus, the 521 uses only one of the
available expansion zone numbers allowing you to assign
additional zone expanders to the next zone number address.
See Addressing the 521LX and LXT.
Consider the Locking Mechanism BEFORE
Installation
Each 521 detector head is equipped with a break away
locking tab slot to prevent unauthorized removal of the
detector head . For installations where unauthorized removal
of the detector head is not a concern, i.e. high ceilings, no
action is required. The head can be removed by simply
turning counterclockwise.
However, when the head must lock to the base, simply
break away the locking tab and the "knock out" for the
screwdriver slot with a pair of pliers. Then, to remove the
detector head, insert a small screwdriver into the slot of the
side of the base and press in while simultaneously turning
the detector head counterclockwise (see Figure 2).
Figure 2
LT-0403 (7/98)