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5409216-REV A 3/21
Potter Electric Signal Company, LLC • St. Louis, MO • Phone: 800-325-3936 • 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.
Specifications subject to change without prior notification.
For Technical Assistance contact Potter Electric Signal Company at 866-956-1211.
Actual performance is based on proper application of the product by a qualified professional.
Should further information be desired or should particular problems arise, which are not covered sufficiently 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.