AUXILIARY EQUIPMENT
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7-6
SIG-00-22-02 JUNE 2022 (Revised September 2022)
Version: B.1
7.3
PSO Couplers
NOTE
PSO Couplers (7A355-f, 7A366-f, 7A377-X-f, & 7A399-f) are available for
use for the 16 standard GCE carrier frequencies, as well as for the 31
common frequencies typically used by non-Siemens equipment.
7.3.1 Tuned Receiver Coupler, 7A355-f
7.3.1.1 Equipment Description, 7A355-f
The Tuned Receiver Coupler, 7A355-f couples the phase shift overlay signal from the track to
the receiver. The 7A355-f coupler provides a low (approximately 1 ohm) impedance to the
receiver from the track. However, the coupler does not shunt other signals from the track since
a low impedance is produced only at the specified frequency. The coupler must always be of the
same frequency as that set on the GCE transmitter and receiver.
The coupler assembly consists of a tubular PVC plastic enclosure with mounting brackets at the
base. There are four AREMA binding posts on the top of the assembly that provide connections
to the circuits housed within the sealed unit (see Figure 7-6).
7.3.1.2 Mounting Dimensions, 7A355-f
Mounting Dimensions for the Tuned Receiver Coupler, 7A355:
Dimensions:
3.50 inches (8.89 centimeters) in diameter
7.75 inches (19.69 centimeters) high (to top of AREMA binding posts)
Weight:
3.5 pounds (1.59
kilograms)
approximate
Figure 7-6 Tuned Receiver Coupler, 7A355-f