14
NMEA 0183 V1.5 Output
The compass outputs the following NMEA standard sentence once per second:
$HCHDM,xxx.x,M,*NN CR LF
$HCHSC,xxx.x,T,XXX.X,M*NN CR LF
$HCVHW,xxx.x,T,xxx,x,M,,,,*NN CR LF
The following NMEA 0183 sentences may be input:
$XXHVD,xxx.x,E*NN CR LF
$XXHVM,xxx.x,E*NN CR LF
RS232 Output
While the electrical specification set out by the NMEA for the 0183 standard is not identical to the
electrical specification of RS232, the similarity is such that the compass NMEA input/output lines will
usually interface with a computer RS232 link.
POWER SUPPLY
Voltage:
10V – 30V dc, lighting for repeater: 12V
Current Drain (typical):
55mA (No indicator)
135mA (2 indicators)
95mA (1 indicator)
175mA (3 indicators)
Output Protection:
All outputs are protected against accidental short circuit. In the event of a short circuit, the compass
will switch off. To return to normal operation, first remove the short circuit, switch off the power to the
compass, wait a few seconds and then re-apply the power. The compass will then work normally.
Repeater:
two winding synchro repeater
SIZE
Sensor Unit
: Cylinder 120mm dia. x 100mm high
Indicator:
Bezel width
: 108mm
Barrel dia
: 63mm
Depth
:
57mm
Cable
:
18 core 15m
WEIGHT
Compass Sensor Unit
: 0.55kg
Indicator
: 0.6kg
