AUXILIARY EQUIPMENT
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7-12
SIG-00-22-02 JUNE 2022 (Revised September 2022)
Version: B.1
7.3.4.1 Equipment Description, 7A377-1-f
The 7A377-1-f coupler assembly consists of a tubular PVC plastic enclosure with mounting
plates extending from each end suitable for pole mounting. There are two #6 AWG wires
marked “Rail” and two #10 AWG wires marked “Line” (see Figure 7-10). When ordering, specify
part number 7001-7A377-ffff (ffff = the assigned frequency for the coupler).
Figure 7-10 Receiver Line to Rail Coupler, 7A377-1-f
7.3.4.2 Mounting Dimensions, 7A377-1-f
Mounting Dimensions for the Receiver Line to Rail Coupler, 7A377-1-f are as follows:
Dimensions:
3.50 inches (8.89 centimeters) O.D. in diameter
9.50 inches (24.13 centimeters) in length (mounting brackets not included)
13.00 inches (33.02 centimeters) in length (mounting brackets included)
Weight:
8 pounds (3.63 kilograms) (approximate)
Leads:
Stranded, black, 10 ft. (3.05 m) length; two #6 AWG (marked Rail) and two #10 AWG
(marked Line)
7.3.4.3 Application Installation, 7A377-1-f
The coupler wires are connected as follows:
•
The two 10-foot (3.05 m) long, #6 AWG leads (marked “Rail”) are connected to the
sealed equalizer that is connected to the appropriate gauge twisted pair track wires
connected to the rails
•
The two 10-foot (3.05 m) long, #10 AWG leads (marked “Line”) are connected to the
sealed equalizer that is connected to the #14 AWG twisted pair of line wires that are
connected to equipment shelter surge panel terminals that are in turn connected to
Terminals A & B of the 7A388 (see Figure 9-8 for exact wiring)
The Receiver Line to Rail Coupler, 7A377-1-f should be used when the distance from the
receiver to the track is between 300 ft. (30.52 m) but less than 2000 ft. (609.6 m) (based on
using 14AWG; increasing the diameter of the wire will proportionally increase the potential
distance from 2000 ft./609.6 m). The Receiver Line to Rail Coupler, 7A377-1-f is used in
conjunction with the Line to Receiver Coupler, 7A388 (see paragraph 7.3.3).