BendixKing PS 578 Remote Transponder Control

Primus II Select Control Head


  • Control for use with MST-67A Enhanced Mode S Transponder (-2001/2101 versions)
  • Complies with Enhanced Elementary Surveillance mandate for Mode S transponders in conjunction with MST-67A (-2001/2101)
  • FID pushbutton allows entry of alpha numeric flight ID and annunciates FID on display
  • Direct replacement for KFS-578A controls
  • Contains all controls required for transponder operation including TEST, STANDBY, ON (transponder), ALTITUDE, VFR, and IDENT
  • Range control standard; configurable according to version of KFS-578A that is being emulated (KFS-578A ranges: Normal (Limited), Extended, or Select)
  • Can also serve as aircraft’s TCAS controller for TCAS equipped aircraft
  • Microprocessor based
  • ABOVE/NORMAL/BELOW selects relative altitude display limits for non-threat category aircraft on traffic display
  • TA selection places the TCAS in the Traffic Advisory mode (TCAS I & II)
  • TA/RA selection places the TCAS in the Traffic Advisory/Resolution Advisory mode (TCAS II)
  • FL (TCAS FLight Level) selection causes the TCAS indicator to change displayed altitude from Relative Altitude to absolute altitude
  • Lamps can be powered by 5 Vac, 5 Vdc or 28V dimming source
  • Note: Multiple voltage lamp input feature of PS-578A varies from KFS-578A that was version specific for lamp voltage.
  • Black or gray faceplate available (see table below)
  • White, Amber, or Night Vision Goggle (NVG) display available
  • Versions available that provide control of two, individually selected transponders
  • Versions available with ON/OFF switch to turn control unit ON or OFF
  • Versions available compatible with TCAS I
  • Versions available compatible with TCAS II

(all versions of PS-578 controls have range control capability and can be configured to correspond to existing range control capabilities of existing KFS-578A controls)

KFS-578A range configurations:

  • “Normal” or Limited traffic display range control include ranges of 3,5,10,15 nm
  • “Extended” traffic display range control include ranges of 3,5,10,15,20,40 nm
  • “Select” traffic display range control include ranges of 5,10,20,40 nm (installation strap option)
  • Units with No Range control flash “RNG CNTRL” for 1 second and “ON DSPL” (On Display) for 1 second when the Range rotary is activated.

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