Determining 4125 Zone Expander's Input And Zone Numbers; Calculating 4125 Input And Zone Numbers; Calculating 4125 Zone And Input Numbers; Using Two Zone Expanders - Regency 4720 Installation Manual

Regency ® Model 4720 Control/Communicator Installation Manual (P/N 150476, Rev. A)

Determining 4125 Zone Expander's Input and Zone Numbers

12.3.2
Note: Output numbers are not calculated for the Model 4125 because the outputs are not numbered—they
are labeled "COM".
12.3.2.1
12.3.2.2

Using Two Zone Expanders

12.3.3
First determine if the Model 4125 will be Expander 1 (Device 2) or Expander 2 (Device 3). If it will
be Expander 1, no modifications need be made to the PC board. If the Model 4125 will be Expander
2, move the jumper block (located beside the 12-wire connectors labeled EXP) to the right.
When the Model 4125 is used with the Model 4720 (without the Model 4724 Control/Expander),
zone numbers and input numbers are calculated the same way as in Section 12.3.2. Begin wiring
Expander 2 at:
When the Model 4125 is used with the Model 4724 Control/Expander, zone numbers and input
numbers are calculated as follows:

Model 4130 Zone Expander

12.4

Installing the Model 4130

12.4.1
The Model 4130 is an RF (Radio Frequency) zone expander. This module mounts inside of the
Model 4720 cabinet and is then connected to the Model 4135 Remote Receiver. This expander can
provide up to 64 additional zones to the Model 4720. Each RF transmitter becomes a separate zone
which reports to the remote receiver. The 4135 receiver communicates to the Model 4130 via a 4-
wire cable with a wire gauge of 22 (or larger), up to 500 feet in length, allowing placement of the
Model 4135 for optimum RF reception.
Note: Any combination of two (2) zone expanders may be used on the Model 4720 but the maximum
number of zones (Including touchpad panic switches) cannot exceed 83.

Calculating 4125 Input and Zone Numbers

The zone number is the number displayed on touchpads and reported to the central station.
The input number is the screw terminal number silk-screened on the Model 4125 PC board.
In order for the correct zone number to be displayed when a contact is activated, it is
necessary to determine the correct input numbers. Calculate the input number using the
following formula:
Input # = (Zone #) – (Last internal zone #)
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.

Calculating 4125 Zone and Input Numbers

If you already know the input number of a contact, and you want to know which zone is
displayed when that contact is activated, use the following formula to calculate the zone
number:
Zone # = (Input #) + (Last internal zone #)
(Expander 1 last input #) + 1
Input # = Zone # – (Last Expander 1 zone #) – (Last internal zone #)
Zone # = Input # + (Last Expander 1 zone #) + (Last internal zone #)
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Revised 10/98