3-3
 
TrueAlarm smoke/heat sensor bases are connected to a 2120 Multiplex Communicating Device 
Transponder (CDT), 4020, 4100+, 4100U, 4100ES, 4120, 4008, or 4010 panel by a single wire 
pair (MAPNET II/IDNet).  The 4098-9792, -9789, 9793, 9796, 9797, and 9798 bases and their 
sensors obtain both power and data over MAPNET II/IDNet wiring.  The 4098-9791 sensor base 
requires 24VDC power for relay operation and the 4098-9794 and 4098-9795 sensor base with 
sounder requires 24 VDC or Notification Appliance Circuit (NAC) power.  The 4098-9791, -9794, 
-9795, and –9796 are NOT compatible with the 2120 CDT.  The 4098-9793 is only compatible 
with the 4010, 4008, 4100U and 4100ES (except with 4100-3103 Quad Panel Isolator). 
 
The table below contains specifications for TrueAlarm Sensor Bases. 
 
Table 3-3. TrueAlarm Sensor Bases Specifications 
 
Sensor Base 
PID 
4098-9789 
(w/ 
Remote 
LED) 
4098-9791 
(w/ Relay 
and 
Remote 
LED) 
4098-9792 
4098-9793 
(Isolator 
Base) 
4098-9794 
(Sounder 
Base) 
4098-9795 
(Multi-
Sensor 
Sounder 
Base) 
4098-9796 
(Multi-
Sensor w/ 
Remote 
LED) 
4098-9797 
(CO Sensor 
Base) 
4098-9798 
(CO Sounder 
Base) 
Working 
Voltage 
(MAPNET 
II/IDNet) 
24-40 VDC 
24-40 
VDC 
24-40 
VDC 
24-40 VDC  24-40 VDC  24-40 VDC  24-40 VDC  24-40 VDC  24-40 VDC 
24V Working 
Voltage 
(Relay or 
Sounder 
Power) 
 
18 – 32 
VDC 
   
18 – 32 
VDC  
18 – 32 
VDC 
   
18 – 32 VDC 
MAPNET 
II/IDNet 
Current * 
400 A 400 A 400 A 500 A 400 A   500 A 500 A 450 A 500 A 
24V Standby 
Current 
(Relay or 
Sounder) 
 270 A     270 A 270 A     270 A 
24V Current 
(Relay or 
Sounder 
Activated) 
 
28 mA 
   
17 mA  20 mA 
   
17 mA 
LED Output  Yes Yes 
   
Yes Yes Yes 
 
Yes 
Sounder 
Output 
       
88 dBA 
minimum 
88 dBA 
minimum 
   
88 dBA 
minimum 
* MAPNET II/IDNet current with Photo Sensor plugged into Base
 
 
Each sensor base has a unique address.  This address is associated with a custom label that 
identifies its physical location within a building.  The base’s address and location must match up 
with the address listed in the specification sheets of the 2120 Job Configuration Report or the 
Programmer’s Report for the 4020, 4100+, 4100U, 4100ES, 4120, 4008, or 4010 System.  See 
Figure 3-1 for DIP Switch location for 4098-9789, -9791, -9792, -9793, and -9796, Sensor Bases.  
See Figure 3-2 for DIP Switch location for 4098-9794, 4098-9795, -9797 and -9798. 
 
Continued on next page 
4098 TrueAlarm Sensor Bases 
Introduction 
Specifications 
Setting the Base’s 
Address