End of line resistors, Applications, Cabinet layout – Edwards Signaling ANS Audio Notification System User Manual
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P/N 3101179 • REV 03 • REB 28FEB13
End of line resistors
Figure 2: Details of the EOLRs used by the ANS
Applications
Cabinet layout
Figure 3: Cabinet layout showing wire routing
FACP NAC
FACP EOLR
3
3 4 5 6
4
5
6
R1
R2
R1: End-of-line resistor for FACP
signal circuit. [1] [3]
Notes
[1] If the Fire Alarm Signal Circuit requires a 4.7 k
end-of-line resistor, then R1 must be
.
Normally, this resistor is connected to the
Signal Circuit through a closed Trouble contact.
When the EVAX 25/50 goes into Trouble, the
contact opens, producing an "open" on that
Signal Circuit, notifying the FACP.
[2] R2 and R3 must match each other. R2 "sets"
what the value of R3 needs to be. R2 tells the
EVAX 25/50 what to expect on the end of the
Speaker Circuit. If a Speaker EOLR (R3)
already exists, simply match that value for R2.
The allowed range of values is 2.2 kO to
100 kO.
[3] Do not connect notification appliances between
TB2-3 and 4 and R1. Attaching notification
appliances to these terminals damages the
ANS.
Ω
4.7 kΩ
SET EOLR
R2: Sets the value of the end-of-line
resistor for the speaker circuit. [2]
R3: End of line resistor for the speaker
circuit. [2]
SPEAKER EOLR
R 3
Note: These connections are internal.
Do not make these connections.
TB1
1
2
3
4
5
6
7
8
TB3
1
2
3
4
5
6
7
8
TB2
1
2
3
4
5
6
7
8
9
10
11
Input power connection is
nonpower-limited. Do not
route any power-limited wiring
within 1/4 in. of the input
power cabling.
All wiring from terminal blocks
is power-limited. Use a
knockout at the top or side of
the cabinet for wire routing.
Battery cabling is Nonpower-
limited. Do not route any
power-limited wiring within
1/4 in. of the battery cabling.
12 V 7 Ah
Battery
12 V 7 Ah
Battery
XFMR