15
REF
CLK
CMD
SIG
REF
CLK
CMD
SIG
PROTECTED
EQUIPMENT
ORANGE
GRAY
YELLOW
GRAY
ORANGE
YELLOW
ORANGE
GRAY
YELLOW
GRAY
2081-9044
Protector
VIOLET
BROWN
VIOLET
BROWN
VIOLET
BROWN
GREEN
GREEN
GREEN
INDOORS OUTDOORS INDOORS
TO THE ORANGE
AND YELLOW LEADS
OF ANOTHER 2081-9044
2081-9044
Protector
2081-9044
Protector
SHIELD
SHIELD
SHIELD
All wiring that leaves a building requires overvoltage protection. Install the Module 2081-9044
whenever wire enter or exits a building. Refer to Figure 12 for Overvoltage Protection wiring.
Refer to the 2081-9044 Overvoltage Protector Installation Instructions (574-832) for specific
details regarding the installation of the 2081-9044 modules.
For each installed pair of 2081-9044 modules, the maximum wiring resistance is reduced by
6 ohms, and the wire-to-wire resistance & wire-to-shield capacitance are reduced by 0.012uF.
With 2081-9044 modules installed, the maximum number of addresses occupied by XA loop
devices (1, 2, 4, or 8 pt. input-output, output only, or input only) is limited to 200 based upon
current limitations. There is no address limitation for Data Gathering Panels (DGPs). In Class B
installations, this limitation only applies to devices after the 2081-9044 connection to the head-end
panel. In Class A installations, limitations apply for the entire loop.
The following example describes a system in which the addresses occupied by1, 2, 4, or 8 pt. XA
Loop devices is limited to 200 while a DGP occupies the remaining addresses without regard to
the 200-device limit.
Example:
There are 150 addresses occupied by input only devices (1, 2, 4,
or 8 pt.); 50 addresses occupied by output only devices (1, 2, 4, or 8 pt.); and 105 addresses
occupied by a DGP.
Figure 12. Overvoltage Protection Wiring for 4-Wire XA Loop
Connecting to the XA Loop,
Continued
Overvoltage
Protection Wiring for
XA Loop
Note:
The above diagram shows wiring for a 4-Wire XA Loop. A 3-Wire XA Loop
is wired the same except that there is one less 2081-9044 Protector because the
Command line is not present
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Summary of Contents for 4100-3115 XALIC
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