GRA 5500 Installation Manual 190-01277-00Page 4-6 Rev. A4.4.2 Altitude Alert (Annunciator) OutputsThe GRA 5500 provides two active-low annunciator outputs for use as “altitude alerts” or altitude trippoints to annunciate when the GRA 5500 indicates a radar altitude below the configured trip point for eachaltitude alert pin. The altitude value for each altitude alert pin is configurable via the GRA 5500 RetrofitInstallation Tool (see Section 3.7.2 for further information on accomplishing configuration).Each altitude alert pin will annunciate the active state if the altitude value output from the GRA 5500 isless than the configured value for the respective altitude alert pin and the status of the altitude is “Normal”.If the GRA 5500 indicates a “No Computed Data” or a “Fail” condition, both altitude alert pins will revertto the inactive state. Both altitude alert pins will also revert to the inactive state whenever the manually-initiated self-test functionality is active (See Section 3.7.4.1 for more information on self-testfunctionality).ACTIVE: 0 V ≤ Vout ≤ 0.5 V, or Rout ≤ 10 ohms, sinking up to 500 mAINACTIVE: Rout ≥ 100k ohms to ground, withstanding up to +36 VDCTable 4-9 Alert OutputsPin Name Pin I/ORADAR ALTITUDE ALERT OUT* 2 17 OutRADAR ALTITUDE ALERT OUT* 1 32 Out*Denotes Active LowDRAFT
