LT
-0403 1.01 © 2015 Digital Monitoring P
roducts, Inc.
800-641-4282
www.dmp.com
Designed, Engineered and
Assembled in USA
INTRUSION • FIRE • ACCESS • NETWORKS
2500 North Partnership Boulevard
Springfield, Missouri 65803-8877
15165
Wiring Specifications
When planning an LX-Bus™ and keypad bus installation, keep in mind the following specifications:
1. DMP recommends using 18 or 22-gauge
unshielded
wire for all keypad and LX-Bus circuits.
Do Not
use
twisted pair or shielded wire for LX-Bus and keypad bus data circuits. To maintain auxiliary power integrity
when using 22-gauge wire do not exceed 500 feet. When using 18-gauge wire do not exceed 1,000 feet.
Install an additional power supply to increase the wire length or add devices.
2. Maximum distance for any one circuit (length of wire) is 2,500 feet regardless of the wire gauge. This
distance can be in the form of one long wire run or multiple branches with all wiring totaling no more than
2,500 feet. As wire distance from the panel increases, DC voltage on the wire decreases.
3. Maximum number of devices per 2,500 feet circuit is 40.
Note:
Each panel allows a specific number of supervised keypads. Add additional keypads in the unsupervised
mode. Refer to the panel installation guide for the specific number of supervised keypads allowed.
4. Maximum voltage drop between the panel (or auxiliary power supply) and any device is 2.0 VDC. If the
voltage at any device is less than the required level, add an auxiliary power supply at the end of the circuit.
When voltage is too low, the devices cannot operate properly.
For additional information refer to the 710 Installation Sheet (LT-0310) and or the LX-Bus/Keypad Bus Wiring
Application Note (LT-2031).
Certifications
California State Fire Marshal (CSFM)
FDNY COA #6167
UL 268 Smoke-Automatic Fire Detectors
Accessories
521LXTPCB Replacement Smoke Detector
Board
525 Replacement Optical Chamber
526 Smoke! in a Can™
Trademark
CleanMe™ is a trademark of Sentrol, Inc.
Specifications
Operating Range
8.8 to 15.0 VDC
Standby Current
8.8mA
Alarm Current
28mA
Maximum Ripple
10% (V
p-p
) peak to peak
Sensitivity Photoelectric
3.1% + 0.50 to 1.00%
Operating Temperature
32°F to 100°F
Operating Humidity Range 0 to 95% non-condensing
RFI Immunity
20V/m minimum; 0 to 1000MHz
Heat Sensor (LXT Only)
135°F
Rate of Rise
15°F/min and > 105°F
Power Up Time
15 seconds
Drift Compensation
1.0%/ft. max.
Detector Head Dimensions 5” Diameter, 2” Height
Mounting Dimensions
4.75” Diameter, .3” Height
Color
White Head and Base
