Communications: electrical – Systems – Selsyn type
Reexamination Certificate
2005-10-18
2005-10-18
Crosland, Donnie L. (Department: 2636)
Communications: electrical
Systems
Selsyn type
C340S315000, C340S693100, C340S333000, C700S003000
Reexamination Certificate
active
06956463
ABSTRACT:
A system master unit is connected to a 24V AC power source. One or more slave units is connected to the master unit by a power/communication line. Bulk capacitance in the master and slave units stores power during a power source positive half cycle. When the source voltage is higher than the bulk capacitance voltages, power is delivered to the loads, during which time communication cannot take place over the power/communication line. During the power source negative half cycle, the power/communication line is disconnected from the AC power source and is then used for communication between the master and slave units. System power is delivered from the energy stored in the bulk capacitance.
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Crenella David
Smyth Michael Steel
Carrier Corporation
Crosland Donnie L.
Wall Marjama & Bilinski LLP
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