Smart Coupler II

Smart Coupler II LE

(click on image for a closer look)

Specifications (apply to all models unless noted)



Original Smart Coupler Smart Coupler II Smart Coupler II LE
Control Panel None 3 3/16" W x 1 1/8" H 3/4" W x 3/4" H
Enclosure 2.4" W x 1" H x 2.3" D 2.4" W x 1" H x 2.3" D 2.4" W x 1" H x 2.3" D
Mounting Behind panel Through panel Behind panel
Material and weight Fire resistant ABS plastic box, UL94-V0, 3.5 ounces

Autopilot output:

  • Differential analog signal
  • Plus and minus 150 mV full scale (selectable 1.25, 2.5, 5, or 10 NM off course)
  • Not referred to ground
  • Positive means turn right to return to course
  • The transmitted output is cross-track error. This is an analog signal that represents the shortest distance from the current position to the selected ground track.
  • There is a simple one-pole filter on the autopilot output with a time constant of approximately two seconds. No other filtering or integration is done in the Smart Coupler. Serial information is translated to analog information and immediately transmitted.

Serial input:

  • Designed to decode NMEA-183 and Aviation Format transmitted signals
  • 4800 and 9600 baud, 8 bits, no parity, 1 or 2 stop bits. Automatically determines baud rate.

External GPS OK output:

  • Open collector transistor, 100 mA max. current, 60 V max. voltage, 1 watt max. power
  • Only turns on when the Smart Coupler is decoding navigation information

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Copyright 2002, Porcine Associates.