ADEMCO VISTA-128B Guide d'installation Page 47

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7-1
SECTION 7
2-Wire Polling Loop Expansion
(Zones 010 - 128)
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In This Section
Polling Loop Overview
Common Characteristics of Polling Loop Zones
Wiring/Addressing RPM Devices
Polling Loop Supervision
Checkout Procedure For Polling Loop Zones
Compatible Polling Loop Devices
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Polling Loop Overview
You can expand the system from the basic 9 zones to up to 128 zones using the built-in 2-wire
polling loop. Each device that is connected to the polling loop has the capability to
communicate with the panel about its status. These devices are called RPMs (Remote Point
Modules). The polling loop provides both power and data to the RPM zones, and is constantly
monitoring the status of all zones enabled on the loop. The maximum current draw of all
devices on the polling loop cannot total more than 128mA (unless using a 4297 Polling Loop
Extender Module).
Refer to the list of compatible devices at the end of this section.
Common Characteristics of Polling Loop Zones
Polling loop zones have the following characteristics:
Must use RPM (Remote Point Module) devices
Supervised by control panel
Individually assignable to one of 8 partitions
Polling loop smoke detector LED will latch on the first detector to go into alarm.
Clearing alarm memory clears the latched LED.
Polling loop smoke detector LED periodically flashes to indicate communication with the
control.
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