Honeywell
MK VI MK VIII EGPWS Installation Design Guide
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8 CONNECTOR INTERFACE8.1 Pinout for Front Connectors sorted by pin number

Table 8.1-1: Pin Assignment For Front Connectors Sorted by Pin Number

Connector -
Pin
Channel
Designation
Reference
Signal Usage Summary
J1-01 SYN_1X Roll Attitude Synchro (X leg)
J1-02 SYN_1Z Roll Attitude Synchro (Z leg)
J1-03 SYN_2Z Magnetic Heading Synchro (Z leg)
J1-04 26REF_1H 26VAC Reference #1 (H)
J1-05 SYN_3X Pitch Synchro (X leg)
J1-06 SYN_3Z Pitch Synchro (Z leg)
J1-07 SYN_3Y Pitch Synchro (Y leg)
J1-08 28V_DISC_09 Autopilot Engaged Discrete (+28VDC)
J1-09 28V_DISC_08 Barometric Altitude Validity Discrete (+28VDC)
J1-10 GS_VAL_L Glideslope Deviation Low Level Validity (-) or
Localizer Deviation (+ left)
J1-11 28V_DISC_06 Glideslope Validity Discrete (+28VDC)
J1-12 GND_DISC_09 Terrain Awareness and TCF Inhibit Discrete (Ground)
J1-13 GND_DISC_08 Mode 6 Low Volume Discrete (Ground)
J1-14 GND_DISC_07 Flap Override Discrete (Ground)
J1-15 GND_DISC_06 Glideslope Cancel Discrete (Ground)
J1-16 GND_DISC_05 Landing Gear Discrete (Ground)
J1-17 GND_DISC_04 Audio Inhibit Discrete (Ground)
J1-18 GND_DISC_03 Landing Flaps Discrete (Ground)
J1-19 GND_DISC_02 Glideslope Inhibit Discrete (Ground)
J1-20 GND_DISC_01 ILS Tuned Discrete (Ground)
J1-21 SYN_1Y Roll Attitude Synchro (Y leg)
J1-22 SYN_2X Magnetic Heading Synchro (X leg)
J1-23 SYN_2Y Magnetic Heading Synchro (Y leg)
J1-24 26REF_1L 26VAC Reference #1 (L)
J1-25 OAT_REF Air Temperature Reference (+5VDC)
J1-26 (Spare)
J1-27 (Spare)
J1-28 28V_DISC_10 Magnetic Heading Validity Discrete (+28VDC)
J1-29 28V_DISC_07 Radio Altitude Validity Discrete (+28VDC)
J1-30 GS_VAL_H Glideslope Deviation Low Level Validity (+) or
Localizer Deviation (+ right)
J1-31 GND_DISC_13 Display Selected Discrete #2 (Ground)
J1-32 GND_DISC_12 Display Selected Discrete #1 (Ground)
J1-33 GND_DISC_11 DH Discrete (Ground)
J1-34 GND_DISC_10 Self Test Discrete (Ground)
J1-35 28V_DISC_05 Landing Gear Discrete (+28VDC)
J1-36 28V_DISC_04 Audio Inhibit Discrete (+28VDC)
J1-37 28V_DISC_03 Landing Flaps Discrete (+28VDC)
J1-38 28V_DISC_02 Glideslope Inhibit Discrete (+28VDC)
J1-39 28V_DISC_01 ILS 1 Tuned Discrete (+28VDC)
J1-40 PWR_H Power Input: 28 VDC (+)
J1-41 PWR_L Power Input: 28 VDC (return)
J1-42 GND Chassis Ground
J1-43 ALT_L Barometric Altitude (-)
J1-44 OAT_L Air Temperature (-)
J1-45 RALT_L Radio Altitude: ARINC 552 or ALT 55 (-)
J1-46 GSDEV_L Glideslope Deviation - Low Level (+ down)
J1-47 (Spare)
J1-48 28V_DISC_11 Localizer Validity Discrete (+28VDC)