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4090-9116 Addressable IDNet Isolator Installation Instructions 

                                       5 

 

Class A Wiring: 

Figure 5 is a modification of Figure 4. Each floor is wired as a Class A 

(Style 6) connection.

 

 

Diagnostic Assistance:

 

For Class A wiring, it is recommended that isolators be 

located as the first and last devices in the loop (as shown below in figure 5). With the 
resulting wiring isolation flexibility, locating wiring faults can be made easier.

 

FigureTag FD4-872-05  

 

 

 

 
 
 
 
 

 

 

Figure 5. Class A Multi-Floor Wiring Example 

 

Notes: 

 
1.  Maximum allowable run from FACP to farthest device not to exceed 2500 

feet.  Maximum total wire (including all T-Taps) from FACP is 10000 feet. 
IDNet and lines are 18 AWG twisted pair (shield recommended). 

2.  The Addressable IDNet Isolator counts as one unit load. 
3.  IDNet wiring is supervised and Power-Limited. 
 

Multi-Floor Isolator 
Examples 

Wiring Notes: 
 

1. Operation of the 4090-9116 Addressable  
    IDNet Isolator requires connection to a 
    compatible 4100ES, 4100U, 4010ES, or 4008 

IDNet communications channel. 

2. This is a one-line drawing showing only 
    IDNet communications wiring. 
3. Some IDNet devices require additional 
    wiring for power. Refer to specific devices 
    for details. 
4. For Class A IDNet communications, it is 
    recommended that Isolators be located 
    close to the panel as the first and last 
    device as indicated. 
5. Maximum line resistance between panel and 

isolator and  between two isolators is 10 ohms 
(780 ft @ 18 AWG). 

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