QK-AS07-N2K Manual
V 1.0
11 of 12
2021
Check which protocol your connecting NMEA devices (e.g. Chart plotter) uses. If you are unsure whether
your connecting NMEA 0183 device uses NMEA 0183 RS422 or RS232, the input/output connections on
the device will give you some indication. Unfortunately, manufacturers who use the older RS232 protocol
are not consistent in their product labelling. The following table may help you identify which protocol your
product uses, however always check the manual to be certain. If your connecting device uses the older
RS232 protocol, use a QK-AS03 Protocol Bridge. The QK-AS03 connects and converts RS422 to the
older RS232 and visa-versa, through a simple connection, no configuration needed.
5. Data Output Protocols
NMEA 2000 output
NMEA 0183 output
Wire
connection
NMEA 2000 five-core screened cable
(12V, GND, CAN_H, CAN_L, Shield)
4 wires:
12V, GND, NMEA Out+, NMEA Out-
Signal type CAN bus
RS-422
Supported
messages
127258 - Magnetic Variation
129025 - Position and Rapid Update
129026 - COG and SOG, Rapid
Update
129029 - GNSS Position Data
129033 - Time and Date
129538 - GNSS Control Status
129539 - GNSS DOPs
129540 - GNSS Sats in View
127250
–
Vessel Heading
$xxGGA - GPS Fix Data
$xxGLL - Geographic Position Latitude and
Longitude
$xxGSA - GNSS DOP and Active Satellites
$xxGSV - GNSS Satellites in View
$xxRMC - Recommended Minimum Specific GNSS
Data
$xxVTG - Course Over Ground and Ground Speed
$xxZDA - Time and Date
‘xx’ above represents ‘
GP
’ if GPS, ‘
GL
’
if GLONASS
and ‘
GA
’
if GALILEO
$xxHDG - Heading with Deviation & Variation
$xxHDM - Heading Magnetic
6. Specification
Item
Specification
Operating temperature
-5°C to +80°C
Storage temperature
-25°C to +85°C
AS07-N2K Power supply
12 VDC (via NMEA 2000 backbone)
AS07-N2K supply current
≤100mA
AS07-C Power supply
12-24VDC
AS07-C supply current
≤
165mA (configuration mode);
≤105mA
(NMEA 0183 output mode);
GPS Satellites Tracked
14-channel (maximum)
GPS Satellites Acquired
51-channel (maximum)
WAAS/EGNOS Satellites Tracked
Any available channel
GPS Position Accuracy
3
m (10’) with WAAS (95% of the time, SA off)
GPS-Fix Update Rate
Up to 10 times per second (user selectable)
Cold Start Acquisition
60 seconds
Compass accuracy (steady conditions)
+/- 3°
Compass accuracy(dynamic conditions)
+/- 5° (pitching and rolling up to 30°)
NMEA data format
NMEA 2000 (and NMEA 0183 with AS07-C)
RS422 (Differential)
RS232 (single-ended)
TX+ and TX- / RX+ and RX-
•
Swap two wires if not
work.
TX+ and TX- (GND) / RX+ and RX- (GND)
TXa+ and TXa- (GND) / RXa+ and RXa- (GND)
Ve and
–
Ve / Input +Ve and
–
Ve
Occasionally older NMEA 0183 RS232 devices are labelled like
RS422 (TX+ and TX- / RX+ and RX-
) so check the products’ manuals.
