Guardian Technologies N7001V2 Maximum Polling Loop Wire Runs Wire Gauge Max. Length, 20 Ð

2-WIRE POLLING LOOP EXPANSION (Zones 10 through 64)

General Information

The following table summarizes polling loop expansion characteristics.

Applications	¥	Built-in 2- wire polling loop interface allows the number of
		zones to be expanded from the basic 9 zones to up to 64
		zones using various Remote Point Modules (RPMs). See
		ADVISORIES below.
	¥	The polling loop provides power to sensors and serves as
		communication path between the panel and sensors.
	¥	Refer to the list of compatible devices at the end of this
		section.
RPM Address (ID)	¥	Each sensor must be assigned a unique address ID number
		(from 10-64) before being connected to the polling loop. Care
		must be taken to assign unique ID numbers to each sensor in
		order to allow the panel to supervise and provide keypad
		status indications for individual sensors.
	¥	Most RPMs have DIP switches to set their addresses. The
		4139SN, 4191SN, 4939SN, 4959SN and 998MX have
		preprogrammed serial numbers which must be "enrolled" by
		the control via the #93 menu programming mode.
Connections	¥	Connect RPM sensors to terminals 24 & 25.
	¥	Sensors can be connected to a single run, or groups of
		sensors may be connected to separate wire runs, star
		configuration, without affecting the panel's ability to supervise
		individual sensors.
	¥	Follow the wiring instructions provided with individual
		sensors. Be sure to observe sensor polarity when wiring.
	¥	The maximum allowable wire run length between the panel
		and the last sensor on a given wire run is shown in the table
		below.

Maximum Polling Loop Wire Runs
	Wire Gauge	Max. Length
	#22 gauge	650	feet		Note: Twisted pair recommended
	#20 gauge	950	feet		for all normal wire runs.
	#18 gauge	1500		feet
	#16 gauge	2400		feet

Important: When in a star configuration, no individual run can be longer than the table indicates, and the total length of all the sensor star runs, combined, cannot exceed 4000'. If using shielded wire, the maximum is 2000'. If longer wire runs are needed, a 4197/4297 Loop Extender Module must be used (see instructions included with the 4197/4297).

Intercom Interference

If an intercom system is being used, the polling loop wires must be as far from the intercom wiring as possible (minimum 6"). If this spacing cannot be achieved, shielded wire must be used. If this is not done, interference on the intercom system might occur. Also note that the maximum total wire length supported is cut in half when shielded wire is used.

NOTE: Shield must be terminated at control terminal 30.

Advisories

The maximum allowable current draw from the polling loop is 64mA. Refer to the POLLING LOOP CURRENT DRAW WORKSHEET (found in the POWERING THE SYSTEM section of this manual) for current draws of various polling loop devices.

Make certain to include the total current drawn on the polling loop in the AUXILIARY CURRENT DRAW WORKSHEET (see POWERING THE SYSTEM section) when figuring the total auxiliary load on the panel's power supply.

Ð 20 Ð