EFD1000 Installation Manual
DOCUMENT # A-01-126-00 PAGE 73-225 Revision H
© Copyright 2009 Aspen Avionics Inc.
8 Electrical Connections
8.1 PFD Electrical Specifications
8.1.1 Power Input
Nominal Input: 14Vdc or 28Vdc
Operating Range: 8Vdc to 32Vdc
8.1.2 Tone (Sonalert) Output
Active on: Ground
Inactive off: Open
Load Current: 100ma maximum
8.1.3 RS-232 GPS Input
The PFD will receive the following data on pin 8 when transmitted from the GPS
receiver. Data is accepted in packets coded in the industry standard "avionics" format
at a baud rate of 9600, 8 data bits, 1 stop bit, no parity. Packets are accepted at
approximately 1 Hz.
Serial packets are prefixed by an ASCII <STX> character (0x02 hex), and completed
with an ASCII <ETX> character (0x03 hex). Multiple messages consisting of an ID and
a Value are contained between the <STX> and <ETX>. Each message is terminated
with an ASCII carriage return (<CR> = 0x0d hex).
A single packet therefore is organized as follows:
<STX><ID><VALUE><CR><ID><VALUE><CR><ID><VALUE><CR> …. <ID><VALUE><CR><ETX>
ID VALUE VALUE FORMAT DESCRIPTION
A
Latitude sddmmhh s = sign (N for north, S for south)
dd = degrees
mm = minutes
hh = hundredths of minutes
B Longitude sdddmmhh s = sign (E for east, W for west)
ddd = degrees
mm = minutes
hh = hundredths of minutes
C Magnetic Track ddd ddd = track in degrees
D Ground Speed ddd ddd = speed in knots
E Distance to Waypoint ddddd ddddd = distance in nm X 10
E Distance to Waypoint dddddd (Alternate format for ARNAV)
dddddd = distance in nm X 100
I Desired Track dddd dddd = track in degrees x 10
K Active Waypoint Identifier ddd[dd] ddd = ASCII waypoint ID
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