Potter FFT-EXP User manual

PAGE 1 OF 35409216-REV A 3/21
INSTALLATION MANUAL: FFT-EXP FIRE FIGHTERS TELEPHONE EXPANDER
Potter Electric Signal Company, LLC • St. Louis, MO • Phone: [phone] • www.pottersignal.com
NOTICE TO THE INSTALLER
This manual provides an overview and the installation instructions for the FFT-EXP module. All terminals are power limited
and should be wired in accordance with the requirements of NFPA 70 (NEC) and NFPA 72 (National Fire Alarm Code).
Failure to follow the wiring diagrams in the following pages will cause the system to not operate as intended. For further
information, refer to the control panel installation instructions. The module shall only be installed with listed control panels.
Refer to the control panel installation manual for proper system operation.
1. DESCRIPTION
The FFT-EXP is an expander module that provides 12 Class B or 6 Class A phone circuits. The expander module
connects to the FFT-1000 through the F-Link and Voice terminals and is expandable up to six (6) devices for Class B
systems and up to fourteen (14) for Class A systems.
A maximum of two (2) FFT-EXP’s can be mounted in the FFT-1000. Additional FFT-EXP’s may be mounted in the AE-8
and AE-14 remote cabinets. All FFT-EXP’s must be installed in the same room within 20 feet of the FFT-1000 and wiring
must run in conduit.
AE-8 (Part Number 3992675) – A maximum of four (4) FFT-EXP’s can be stored in the AE-8 enclosure.
AE-14 (Part Number 3992676) – A maximum of six (6) FFT-EXP’s can be stored in the AE-14 enclosure.
2. SETTING THE ADDRESS
The FFT-EXP address is set by a ve (5) position dip switch, which is used to program the device address ranging from
one (1) to fourteen (14).
FIGuRE 1. DIP SWITCH SETTINGS TABLE (ADDRESSES 1–31)
Note: Each "gray" box indicates that the dip switch is "On," and each "white" box indicates "O."
The examples shown below illustrate a P-Link's dip switch settings: the 1st example shows a P-Link module not ad-
dressed where all dip switch settings are in the default "O" position, the 2nd illustrates an addressed P-Link module via
the dip switch settings.
FIGuRE 2. EXAMPLES OF P-LINK MODuLE SHOWING DEFAuLT DIP SWITCH SETTING (uNADDRESSED) & ADDRESSED
124816 124816
117
218
319
420
521
622
723
824
925
10
26
11
27
12
28
13
29
14
30
15 31
16 124816
124816
OFF
ON
1 2 4 16
8All dip switches are
shown in the "O󰀨"
position. OFF
ON
1 2 4 16
8Example shows this P-Link module
address = 10. Dip switches #2 & 8
are in the "On" position.

PAGE 2 OF 35409216-REV A 3/21
Potter Electric Signal Company, LLC • St. Louis, MO • Phone: [phone] • www.pottersignal.com
INSTALLATION MANUAL: FFT-EXP FIRE FIGHTERS TELEPHONE EXPANDER
Before connecting a device to the RS-485 connection, take the following precautions to prevent potential damage to the
RS-485 connection.
• Power to the RS-485 connection is removed.
• Field wiring on module is correctly installed.
• Field wiring has no open or short circuits.
3. TECHNICAL SPECIFICATIONS
Standby Current 56 mA
Alarm Current 116 mA
FFT-EXP Voltage 24VDC
Operating Temperature Range 32° to 120° F (0° to 49°C)
Operating Humidity Range 10% to 93% (non-condensing)
4. INSTALLATION
The FFT-EXP connects to the FFT-1000 using the F-Link and Voice terminals to establish communication. The connec-
tions are power limited and supervised. Each board is equipped with stacker bracket for secure and accessible mounting.
The FFT-EXP must be installed within 20 feet of the FFT-1000 and the wiring must run through conduit.
FIGuRE 3. FFT-EXP MODuLE

PAGE 3 OF 35409216-REV A 3/21
Potter Electric Signal Company, LLC • St. Louis, MO • Phone: [phone] • www.pottersignal.com
INSTALLATION MANUAL: FFT-EXP FIRE FIGHTERS TELEPHONE EXPANDER
NOTES:
• RS-485 wiring style supports class A and class B.
• RS-485 is power limited.
• Wiring for terminals (A, B) and (+, -) are supervised.
• All wiring is between #12 (max.) And #18 (min.).
• Wire preparation – strip all wires 1/4 inch from their edges as shown here:
– Stripping too much insulation may cause a ground fault.
– Stripping too little may cause a poor connection and subsequently an open circuit.
These instructions do not purport to cover all the details or variations in the equipment described, nor provide for every
possible contingency to be met in connection with installation, operation and maintenance.
Specications subject to change without prior notication.
For Technical Assistance contact Potter Electric Signal Company at 866-956-1211.
Actual performance is based on proper application of the product by a qualied professional.
Should further information be desired or should particular problems arise, which are not covered su󰀩ciently for the purchaser’s
purpose, the matter should be referred to a distributor in your region.
1/4 inch
FIGuRE 4. FFT-EXP INSTALLATION IN CABINET
AE-8 (P/N 3992675) - MAXIMUM FOUR (4) FFT-EXP’S
CAN BE STORED IN THE AE-8 ENCLOSURE.
AE-14 (P/N 3992676) - MAXIMUM SIX (6) FFT-EXP’S
CAN BE STORED IN THE AE-14 ENCLOSURE.