N7571V1 Ê1/96
No. 4297
Polling Loop Extender Module
For Use With Control/Communicators Supporting Polling Loop Devices
INSTALLATION INSTRUCTIONS
GENERAL INFORMATION
The 4297 polling loop extender module is an accessory for use
with Ademco control panels supporting polling loop devices.
The 4297 module receives signals from the control panel via
its "input" polling loop, and then re-transmits boosted copies
of these signals via its "extension" polling loop.
■
The 4297 draws power for its internal circuitry and its
extension polling loop from a supplementary power supply
such as the control panelÕs auxiliary power output or,
optionally, from an Ademco 1321 16.5VAC, 25VA
transformer and an external 12v lead-acid battery (no
power is drawn from the control panelÕs polling loop).
Also, the 4297 can isolate open and short circuit faults
occurring on its extension polling loop from its input polling
loop. These characteristics allow the 4297 module to be
used to extend the control panel's polling loop, to provide
additional polling loop current, or to provide electrically
isolated polling loops.
■
The 4297 module is fully supervised and causes the control
panel to trigger supervision fault indications for devices
wired to the extension polling loop when operating power to
the module fails, or when an open or short circuit occurs on
the extension polling loop. Refer to the control panel's
installation instructions for the type of supervision fault
indication provided.
■
The 4297 module has a cut jumper option for selecting
whether or not extension polling loop shorts are to be
isolated from the input polling loop.
With the jumper intact,
extension
polling loop shorts are
isolated from the
input
polling loop. Leave the jumper in
tact if you do not want to disrupt the control panel's ability
to communicate with devices wired to the
input
polling loop because of a short on the
extension
polling loop.
With the jumper cut, extension polling loop
shorts are not isolated from the input loop and will
disrupt communications with devices on the input
polling loop. Cut this jumper only when it is desired
to have the control panel provide a polling loop
short indication as well as supervision fault
indications for devices wired to the extension
polling loop when the extension polling loop is
shorted.
Note that some control panels may not have the
ability to provide polling loop short indications.
Refer to the control panel's installation
instructions.
Important Notes:
* The 4297 cannot be used to increase the number of
polling loop zones supported by the control panel.
* The 4297 is not designed to be used in a Class A
polling loop wiring configuration.
* The 4297 may not be powered from the No. 1321
transformer and an external lead-acid battery for
UL burglary and all fire installations.
MOUNTING
For UL burglary and all fire installations:
Mount the 4297 module inside a UL Listed enclosure such as
the control panel's enclosure. Note that the enclosure must
be UL Listed for the desired application; i.e., use an attack -
resistant enclosure with a tamper switch for commercial
burglary applications.
For non-UL certified installations:
When powered from the 1321 transformer and external
battery, mount the 4297 and battery in an enclosure. When
powered from a supplementary power supply, a separate
enclosure is not required.
Mount the 4297 module directly on a surface using the
slotted holes located on the back of its housing (mounting
screws provided). Feed the wires through the slot on the side
or through the breakout located on the back of the housing.
Affix the connections label provided to the inside of the 4297
module's cover.
JUMPER SETTING & WIRING CONNECTIONS
The 4297 module provides a 9-position terminal block for
making power, earth ground and polling loop connections.
The screw terminal assignments on this terminal block are
described in Figure 1.
Blue Jumper Option
Cut the blue option jumper, shown in Figure 1, ONLY when
it is NOT desired to isolate extension polling loop shorts from
the input polling loop.
Refer to the GENERAL INFORMATION section for more
information about this jumper.
9
8
7
6
5
4
3
2
1
J1 (BLUE)
TB1
+
Ð
Ð
+
AC
AC
Earth Ground
Ð
+
EXTENSION
POLLING LOOP
}
}
}
}
INPUT POLLING LOOP
(FROM CONTROL)
16.5VAC, 25VA
TRANSFORMER
No. 1321 (SEE NOTE 1)
12VDC POWER INPUT OR
12V LEAD ACID BATTERY
INPUT. 1.2 AH MIN/
2.6AH MAX. MAKE
CONNECTIONS USING
CABLE SUPPLIED.
(SEE NOTE 1)
SHORT ISOLATION JUMPER:
INTACT:
EXTENSION LOOP SHORTS ARE
ISOLATED FROM INPUT LOOP.
CUT:
EXTENSION LOOP SHORTS ARE
NOT ISOLATED FROM INPUT LOOP.
NOTES:
1. WHEN A SUPPLEMENTARY POWER SUPPLY IS USED,
CONNECT IT TO TERMINALS 1 & 2 AND MAKE NO
CONNECTIONS TO 4 & 5. USE A CLASS II (POWER LIMITED)
SUPPLY.
WHEN A No. 1321 TRANSFORMER IS USED, CONNECT IT
TO TERMINALS 4 & 5.
2. ALL CIRCUITS ARE SUPERVISED EXCEPT CONNECTIONS
TO THE No. 1321 TRANSFORMER AND TO THE LEAD-ACID
BATTERY.
3. ALL OUTPUT CIRCUITS ARE POWER LIMITED.
Figure 1. 4297 Wiring Connections
