Regency 4720 - Determining Zone Expander ID and Zone Numbers

Regency
®
Model 4720 Control/Communicator Installation Manual (P/N 150476, Rev. A) Revised 10/98
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12.1.2 Determining ID Numbers and Zone Numbers
12.1.2.1 Calculating 4110 ID Numbers from Zone Numbers
To insure that the sensors activate the appropriate zones, you must assign the correct ID
numbers to the sensors. Zone numbers within the following range can be used with the
Model 4110 Zone Expander, if only one zone expander is used:
Lowest 4110 expansion zone # = Last internal zone # + 1
Highest 4110 expansion zone # = Last internal zone # + 60
The Last internal zone # is the number you entered in the Model 4720 Programming Record
for the Last Int Z# option (see Section 9: Internal Zones). If you have not reprogrammed the
last internal zone, the factory-programmed value is 16.
Use the formula below to determine the ID number for each sensor:
Loop 1: ID # = (Zone # – Last internal zone #)
Note: If you get an ID # greater than 30, you must use Loop 2. Use the formula below to calculate
the ID #.
Loop 2: ID # = (Zone # – Last internal zone #) – 30
Example: If you are programming an ID number for a sensor that, when activated, will trigger an alarm
in Zone 49 (Loop 2), and your last internal zone was 13, the ID number would be determined
as follows:
ID # = (49 – 13) – 30
ID # = 6
12.1.2.2 Calculating Zone Numbers from ID Numbers
If you already know a sensor ID number and you need to determine which zone number is
displayed when that sensor is activated, use the following formula:
Loop 1: Zone # = ID # + Last internal zone #
Loop 2: Zone # = ID # + Last internal zone # + 30
12.1.3 Using Two Zone Expanders
When using two (2) zone expanders you must decide which expander will be 1 and which will be 2.
If the Model 4110 is to be 1, no modifications need be made to the PC board. If the Model 4110 is to
be Expander 2, you must first cut Jumper J1 on the Model 4110 printed circuit board. When this is
done, the Model 4720 will see the Model 4110 as “Device 3” instead of “Device 2”. When using
software Revision 880911 or later, the zone numbers for the two (2) expanders are determined in the
same way (see Section 12.1.2: Determining ID Numbers and Zone Numbers).
CAUTION:
When the Model 4110 is being used as Expander 2, the zone
numbers selected must not overlap the zone numbers used on
Expander 1.
Total system zones (including internal zones, Expander 1
zones and Expander 2 zones) may not exceed 80, regardless
of how many zone expanders are used.