DData Bus Couplers are the key components in the fabrication of your bus architecture. Data Bus coupler is a device which is used to couple one bus to the other without any interruption in power supply and without creating hazardous arcs. Bus coupler is a breaker used to couple two bus bars in order to perform maintenance on other circuit breakers associated with that bus bar.
The purpose of the Data Bus Couplers is to prevent a short on a single stub from shorting the main Data Bus i.e. to isolate the main Bus from the terminals, to reduce reflections and maintain signal impedance levels.
MIL 1553 Couplers can be ordered in different configurations as given below.
614 indicates wire type
MIL 1553 Couplers can be ordered with custom cable lengths.
Data Bus Terminator
Electrical termination is required to minimize the effects of signal reflections that can cause waveform distortion. Terminators can be used internally or externally to the coupler.
If two or more non-terminated couplers are used on a bus, then the couplers at each end of the bus must be terminated externally with 78 ohm terminators on the unused bus connections of the end couplers.
Internal and External Inline Terminator resistor- 78 Ohms
Part number for terminators:
Moulded External Inline Terminator: AN-017-614-R78-200
Types of Data Bus Couplers and Terminators
Couplers:
