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Power Supply Connections
The 4297 module can draw power for its internal circuitry
and its extension polling loop from a supplementary power
supply such as the control panel's auxiliary power output.
See Figure 2.
Optionally, power can be provided from an Ademco No. 1321
16.5VAC, 25VA transformer and an external 12V lead-acid
battery. See Figure 3.
Polling Loop Connections When Using One 4297
Use one 4297 to extend the polling loop, to provide additional
polling loop current, or to provide an extension loop which is
electrically isolated from the input loop.
Make the connections shown in Figure 4 when only one 4297
module is used. Make sure that the wire run length limits
indicated in Figure 4 are not exceeded.
J1 (BLUE)
4297
Figure 2. Supplementary Power Supply Connections
(For UL Burglary and All Fire Applications)
J1 (BLUE)
4297
Figure 3. Transformer and Battery Connections
(Not For UL Burglary and All Fire Applications)
Polling Loop Connections When Using Two 4297s
Use two 4297s to provide two extension loops which are
electrically isolated from each other, or to provide more
current than one 4297 can supply.
Make the connections shown in Figure 5 when two 4297
modules are used. Do not wire 4297 modules in series (i.e.,
do not wire one moduleÕs extension loop to another moduleÕs
input loop). Do not use more than two 4297 modules in
parallel unless otherwise stated in the control panel's
installation instructions. Make sure that the wire run length
limits indicated in Figure 5 are not exceeded.
Important Notes:
* Twisted pair is recommended for all polling loop wire runs.
* If an intercom system is being used, keep the polling loop
wiring as far from the intercom wiring as possible
(minimum 6 inches). If this spacing cannot be achieved, use
shielded wire. Note that use of shielded wire reduces the
maximum permissible polling loop wire run length, as
indicated in Figures 4 and 5.
WIRE RUN LENGTH
MUST NOT EXCEED:
GAUGE
9
8
7
6
5
}
NO
CONNECTION
4
3
EARTH GROUND
2
1
CURRENT DRAW:
¥ 50 mA + EXTENSION LOOP DRAW
DURING ACTUAL OPERATION.
¥ INCREASES TO 350 mA WHEN
EXTENSION LOOP SHORTED.
+12VDC
POWER
9
8
7
6
5
4
3
2
1
+
Ð 2 Ð
USE A CLASS II (POWER
LIMITED) POWER SUPPLY
WHICH IS UL LISTED FOR
LENGTH
THE DESIRED FIRE AND/OR
#22
100 FT
BURGLARY APPLICATION.
FOLLOW THE POWER
#20
150 FT
SUPPLYÕS INSTRUCTIONS
#18
225 FT
REGARDING BACKUP
#16
375 FT
BATTERY AND AC/BATTERY
SUPERVISION SIGNAL CON-
NECTIONS THAT APPLY TO
THE DESIRED APPLICATION.
TAKE CARE TO OBSERVE
POWER SUPPLY RATINGS.
Ð
SUPPLEMENTARY
POWER SUPPLY
+
USE CONTROL PANELÕS
AUXILIARY POWER OR USE
A SEPARATE POWER SUPPLY
No. 1321
16.5VAC, 25VA
TRANSFORMER
EARTH GROUND
USE CABLES SUPPLIED
Ð
12V LEAD-ACID BATTERY
1.2AH MIN / 2.6AH MAX
NOTE:
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