2-Stub Compact Coupler - 90-50202
This is a 2-stub, 2 bus jack, standard box style data bus coupler. The transformer ratio is 1.41:1 with R1-R2 stub resistor values of 59 ohm, 2W, 1%, the most common type NO INTERNAL TERMINATION, external terminators required for the unused bus. The bus coupler is connected between MIL-STD-1553B bus and bus devices (controllers, monitors and terminals). The purpose of a bus coupler is to reduce reflections, protect the bus and maintain impedance of the bus by employing a transformer and a pair of fault-isolation resistors.