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Interfaces

For both the DVL-A50 and the DVL-A125.

LED Signals

  • No green light: Power is off.

  • Flashing green light (slow): DVL looking for bottom lock.

  • Fixed green light: DVL has bottom lock. The LED is mostly on, and blinks quickly to indicate that it is alive.

Wiring interface

The tables below shows the pinning of the DVL-A50 interface.

Interface Color
Positive (10-30V) Red
Negative/Ground Black
ETH TX+ Orange/White
ETH TX- Orange
ETH RX+ Green/White
ETH RX- Green
UART TX Brown/White
UART RX Brown

Note

Power must be applied to the power terminals before applying voltage to UART pins

Terminal Interface

The DVL-A50 has a 3.3 volt UART interface (5V tolerant).

Settings Value
Baud rate 115200
Data parity stop 8N1
Flow control None

Warning

There can be a momentary (<10 us) power spike (~5 V) on the UART lines when power is applied to the DVL, which may damage equipment which is not 5V tolerant.

See the DVL's serial protocol.

Ethernet Interface

See networking and the DVL's TCP protocol.

Code examples

Code for parsing of the data outputted by the DVL over TCP.

I/O interface

The I/O Interface provides a simple means of connection to the Water Linked DVLs. It provides magnetics for the ethernet connection and utilizes the Molex Micro-Fit 3.0 power connector which is standard for Water Linked products.

There currently exists three revisions of the I/O Interface. Revision 2 and 3 are electrically identical. Revision 4 has an integrated USB-to-UART interface and a micro USB port.

Revision 4

I/O_Interface_rev4

Dimensions: 50.6 x 47 x 18.6 mm (Width x Height x Thickness)

Connector Function Comment
RJ45 (8P8C) Ethernet 10/100 BASE-T
Micro USB Serial FTDI based
Molex Micro-Fit 3.0 Power 10 - 30 VDC
2x Ø1.5mm pads Alt. power Fits Würth 691137710002

Revision 3

I/O_Interface_rev3

Dimensions: 40 x 42 x 18.6 mm (Width x Height x Thickness)

Connector Function Comment
RJ45 (8P8C) Ethernet 10/100 BASE-T
3x1 header Serial TX, RX, GND
Molex Micro-Fit 3.0 Power 10 - 30 VDC
2x Ø1.5mm pads Alt. power Fits Würth 691137710002

Revision 2

I/O_Interface_rev2

Dimensions: 30.6 mm x 50 x 18.6 mm (Width x Height x Thickness)

Connector Function Comment
RJ45 (8P8C) Ethernet 10/100 BASE-T
3x1 header Serial TX, RX, GND
Molex Micro-Fit 3.0 Power 10 - 30 VDC
2x Ø1.5mm pads Alt. power

Note

The Molex Micro-Fit 3.0 on revision 2 is prone to damage by excessive sideways force. Take care not the yank the power cable when connected.