beautypg.com

End of line resistors, Applications, Cabinet layout – Edwards Signaling ANS Audio Notification System User Manual

Page 6

background image

6 / 12

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