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r y MAPNET II/TrueAlarm ADDRESSABLE INTERFACE DESCRIPTION GENERAL Addressable device communications operate via Tracking this average value as a continuously shifting Simplex MAPNET II communications. Using a two wire reference point filters out environmental factors that circuit, individual initiating devices such as automatic cause shifts in sensitivity. smoke detectors, manual fire alarm stations, TrueAlarm Programmable Sensitivity. The sensitivity of each smoke sensors, and sprinkler waterflow switches can sensor can be field programmed at the 4020 Control communicate their exact identity and status. This Panel for different levels of smoke obscuration (in addressability allows the location and the condition of percent). Sensor sensitivity can be individually varied each device to be displayed on the 4020 panel LCD automatically by time of day, typically more sensitive at and on system annunciators.Additionally, NACs night and less sensitive during daytime hours. In order (horns, bells, strobes, etc.)as well as other control to evaluate whether the sensitivity should be revised, circuits (fans, dampers, etc.)may also be individually the peak value that is stored in memory can be read controlled. and compared to the alarm threshold directly in Capacity.A combined total of 127 addressable monitor percent. and control devices may be intermixed on the same Diagnostics and Dual Stage Operation.TrueAlarm common pair of wires. By using Zone Adaptor Modules operation gives the 4020 system the ability to (ZAMs), conventional initiating devices can be automatically indicate when a sensor is dirty and connected to the MAPNET II circuit. (Refer to data excessively dirty.The NFPA 72 requirement for a test sheet S2190-0012 for addressable device information.) of the sensitivity range of the sensors is fulfilled by the TrueAlarm ability to maintain the sensitivity level of MAPNET II ADDRESSABLE OPERATION each sensor. Additionally, a"two-stage"alarm The MAPNET II controller continuously interrogates operation can be programmed in the 4020 panel. For each addressable device on the communication example, a 1%smoke obscuration reading could cause channel for status condition such as: normal, a local indication allowing the building security staff to off-normal, alarm, or trouble. Sophisticated poll and investigate,while a 3%obscuration report could response communication techniques ensure immediately initiate a system alarm. supervision integrity and allow for"T-tapping"of the Thermal Sensing.TrueAlarm heat sensors provide circuit. readings of local temperatures. For fire sensing, rate- Wiring. Up to 10,000 total feet of twisted, shielded of-rise sensing can be selected as either 15° F(8.3° C) 18 AWG wire may be connected to the MAPNET II or 20° F (11.1° C)per minute with an independent fixed channel. The maximum distance from the panel to the limit of 135° F(57°C)or 155° F(68°C). For general farthest device is limited to 2500 feet. Unshielded wire temperature sensing, a set point can be selected from may be used in certain retrofit applications. 32°to 158° F (0°to 70°C)and the local temperature readings can be used to warn of potential problems. TrueAlarm SYSTEM OPERATION The temperature readings can be programmed to be MAPNET II can also communicate with TrueAlarm read in either Fahrenheit or Celsius. smoke density and temperature sensors. Every four seconds,smoke sensors transmit an output value Data Display.Sensor data can be displayed on the based on their smoke chamber condition. system LCD,on a remote CRT/keyboard, or printed on a remote printer. Figure 5 is a sample of a typical The 4020 CPU maintains a current value, peak value, CRT/keyboard screen when selected for a TrueAlarm and an average value of each sensor's output. Status is Status Report. determined by comparing the current sensor value to its average value. TIME: 2:42:03 custom title USER: 1 DATE: WED 03 MAY 00 Port 1 Card 5A ACCESS: 1 REPORT 3: TRUEALARM STATUS REPORT Zone Sensi- Almost Name Custom Label tivity Device Status Dirty M1-1 ANALOG PHOTO - CLEAN ROOM 0.5 NORMAL M1-2 ANALOG ION - CLEAN ROOM 1.3 NORMAL M1-3 ANALOG PHOTO - MAIN LOBBY 2.5 NORMAL *YES* M1-4 ANALOG PHOTO - CONFERENCE ROOM 1 2.5 NORMAL M1-10 HEAT DETECTOR - GARAGE 135F NORMAL M1-il ANALOG PHOTO - KITCHEN 3.7 NORMAL *YES* Press PF3 for next screen OR PF4 to return to menus Figure 5.Typical TrueAlarm CRT Status Report Information S4020-0003-6 6/0 page 5 /;)