Zeni Lite Buoy Co. Ltd. 4180026 ユーザーズマニュアル
Connecting external sensors and systems
Page 30
6.2.6
Isolated RS422 / NMEA0183 port
The extended sensor interface provides a fully isolated NMEA0183 (RS422 level) serial interface for
connection of external equipment. Connections for the isolated NMEA0183 port are available at the 24 way
connector described in section 5.4.1.
The port operates at 38,400baud by default. The data types accepted are determined by the configuration of
the sensor interface.
connection of external equipment. Connections for the isolated NMEA0183 port are available at the 24 way
connector described in section 5.4.1.
The port operates at 38,400baud by default. The data types accepted are determined by the configuration of
the sensor interface.
6.2.7
RS232 ports
The extended sensor interface provides two non-isolated RS232 interfaces for connection of external
equipment. These ports are available via the 24 way connector described in section 5.4.1.
The port operates at 38,400baud by default. The data types accepted are determined by the configuration of
the sensor interface.
RS232 port 2 shares hardware with the SDI-12 interface described in section 6.2.8 and is not available if the
SDI-12 interface enabled by configuration.
equipment. These ports are available via the 24 way connector described in section 5.4.1.
The port operates at 38,400baud by default. The data types accepted are determined by the configuration of
the sensor interface.
RS232 port 2 shares hardware with the SDI-12 interface described in section 6.2.8 and is not available if the
SDI-12 interface enabled by configuration.
6.2.8
SDI-12 interface
The extended sensor interface provides an SDI-12 for interface to external sensors supporting this bus. The
extended sensor interface operates as an SDI-12 bus master. The electrical interface consists of three
connections:
extended sensor interface operates as an SDI-12 bus master. The electrical interface consists of three
connections:
● A serial data line
● A ground line
● A 12-volt line (used to power connected sensors)
● A ground line
● A 12-volt line (used to power connected sensors)
For further information on the SDI-12 interface please refer to the specification available at
http://www.sdi-12.org/. Note that the 12V supply line is not provided by the sensor interface.
http://www.sdi-12.org/. Note that the 12V supply line is not provided by the sensor interface.
6.2.9
Relay drive outputs
The extended sensor interface provides two open drain relay drive outputs that default to the normally open
state. The outputs are capable of switching 100mA at 12VDC or 50mA at 24VDC; a circuit diagram of the output
driver is provided in Figure 15.
Note that use of the relay drive outputs is restricted to configurations where the extended sensor interface is
permanently powered on.
state. The outputs are capable of switching 100mA at 12VDC or 50mA at 24VDC; a circuit diagram of the output
driver is provided in Figure 15.
Note that use of the relay drive outputs is restricted to configurations where the extended sensor interface is
permanently powered on.
Figure 15 Relay drive output reference circuit
6.2.10 Input voltage monitor
The extended sensor interface has the facility to measure the incoming power supply voltage. This can be used
to provide a measurement of the charge state of a battery supply to the transceiver. The voltage measured can
be included in transmitted AIS measurements if so configured. No additional connections are required in order
to make use of this facility.
to provide a measurement of the charge state of a battery supply to the transceiver. The voltage measured can
be included in transmitted AIS measurements if so configured. No additional connections are required in order
to make use of this facility.
From processor
RELAY_DRIVE
10K
100R
GND
GND
BSP75NTA