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
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
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
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.