BBG-550/550D Serial to Synchro/Resolver Interface, Bulkhead Mount or Rack Mount

The BBG-550 is a bulkhead mount NMEA 12/13, or 19 inch rack mount enclosure which converts angular information from a serial data message into three outputs: a two speed synchro or resolver output and a NMEA-0183 serial data format.

If you need more information, click on the link below for the data sheet.

The two speed synchro or resolver outputs are factory configurable to user defined voltages and frequencies. Outputs are transformer isolated and fully protected against overloads, transients from load kickbacks, short circuits and overheating.

The serial data output is transmitted over RS232 and RS422 interfaces using the NMEA-0183 message structure.  This output is transmitted over both RS-232 and RS-422 interfaces. Input and output baud rates are switch selectable on the Digital to Synchro Processor housed internal to the BBG-550. Selectable baud rates include: 1200, 2400, 4800, 9600, and 19,200 bits per second. Default data output is 9600, 8 bits, no parity, and one stop bit (9600, 8, N, 1).

  • Serial Input, Two-Speed Synchro/Resolver and Serial Outputs
  • NMEA Type 12/13 or 19 inch Rack Mount Enclosure
  • NMEA-0183 Compatible Outputs
  • RS-232, RS-422, RS-423, RS-485, MIL-STD-188C Protocols
  • AC Input Filtered and Circuit Breaker Protected

Card Layout:


Technical Specification
Parameter Value Units
Power Input 115 Volts
60 Hertz
500 Milliamps
Temperature Range
Operating Temperature 0 to +50 °C
Storage Temperature -65 to +150 °C
Physical Characteristics
Bulkhead Mount 16 x 14 x 6 Enclosure (in.)
Rack Mount 19 x 19.5 x 3.5 Enclosure (in.)

The serial data input/output uses the NMEA 0183 message structures and supports RS-232, RS-422, RS-423, RS-485, and MIL-STD-188C protocols. Custom message formats are available upon request.

Power input, serial input, reference inputs, synchro/resolver outputs, and serial outputs are available on standard militarized connectors. Synchro outputs are virtually indestructible incorporating current limiting, short circuit protection, over voltage transient protection, and thermal cutoff. AC input power is filtered and circuit breaker protected.

The BBG-550D includes a back-lit Liquid Crystal Display (LCD) which provides a visual indication of the synchro angle outputs.