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Interfaces

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

LED Signals

  • No green light: Power is off.

  • Fixed green light: The DVL is powering on. Depending on configuration it can take ~30-60 seconds to power on.

  • Flashing green light, mostly off (slow, every few seconds): DVL looking for bottom lock.

  • Flashing green light, mostly on (slow, every few seconds): DVL has bottom lock.

  • Flashing green light (fast, many times a second): DVL is in thermal shutdown.

Wiring interface

The tables below shows the pinning of the DVL interface.

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

Seacon MCOM8M Connector (DVL A50 only)

The table below shows the specific pinout for the Seacon MCOM8M connector.

Interface Pin
Negative/Ground 1
Positive (10-30V) 2
ETH RX+ 3
ETH RX- 4
ETH TX- 5
ETH TX+ 6
UART TX 7
UART RX 8

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.