Quark-elec Manual
4 of 7
2022
V1.00
power supply and always requires two termination resistors.
Please note the AS00 is powered by the NMEA 2000 network.
3.2. Connecting to a NMEA 0183 Device
The AS00 comes with a 4-way terminal block. Two of these terminals, labelled as
‘OUT+’ and ‘OUT-‘,
represent the NMEA 0183 output port and can be used to connect the AS00 to an NMEA 0183 listener
device (e.g., a
VDR’s or a chart plotter’s NMEA 0183 input). Please ensure the NMEA 0183 listener
device is connected to the right terminals, as connecting it to the wrong terminals will damage both the
AS00 and the other device.
NMEA 2000 networks operate with a high data rate of 250kbps. To reduce the amount of data loss
caused by data overflow when converting data from a high-speed network to a lower speed
connection
, the AS00’s NMEA 0183 output baud rate is set to 38400bps. Please ensure your NMEA
0183 listener device input’s baud rate can be set to 38400bps, otherwise it will not be able to
communicate with and receive data from the AS00 gateway.
Please read your listener device’s
manual or contact the manufacturer for more details.
Although the AS00
’s NMEA 0183 interface is based on the RS422 communication protocol (differential
ends), it also supports NMEA0183-RS232 interface devices (single end). The following tables provide the
wiring information for each type.
QK-AS00
terminal
RS422 device terminals
NMEA 0183
Output
NMEA OUT+
NMEA input+ *[¹]
NMEA OUT-
NMEA input-
*
[1]
Swap NMEA + and NMEA- wires if the connection does not work.
QK-AS00
terminal
RS232 device terminals
NMEA 0183
Output
NMEA OUT+
GND *[²]
NMEA OUT-
NMEA input
*
[2]
Swap NMEA input and GND / NMEA output and GND wires if the connection does not work.
The AS00 also offers the choice to output NMEA 0183 data in NMEA 0183 standard format or raw data
format. By short connecting the SET and the GND terminals of the unit, the AS00 will output data in NMEA
0183 standard data format. If SET and GND terminals are left un-connected, the AS00 will output data in
raw data format.
4. Configuration
The AS00 is a plug and play device, no initial configuration is required before connecting it to an NMEA
0183 device or to the NMEA 2000 network. By default, the AS00
’s output baud rate is set to 38.4kbps.
As the NMEA 2000 network uses a significantly higher data rate (250kbps), while the default NMEA
0183 port runs at 38.4bps, data overflow on the NMEA 0183 output port cannot be completely avoided.
