USB Logger Specification


Dimensions 110 x 58 x 28mm (4.4"x2.3"x1.1")
Fastenings 4 M3.5 - M4.5 (#6 - #9) countersunk fastenings (not supplied)
Voltage 9 - 30V DC, reverse polarity protected
Current Approx. 0.11A @ 12VDC, depending on USB memory stick
NMEA Interface
Two multiplexed opto-isolated NMEA0183 input channels, Ch1 and Ch2
Current drawn from talker
<2mA at all voltages
Data protocol
4800bps, 8 data bits, no parity, 1 stop bit
Sentence Validation
Starting $, ending <CR><LF>, message length, checksum (if present), timeout
Seatalk Interface (option)
1 NMEA0183 interface is replaced with a Seatalk interface
Electronic The Seatalk signal is converted to RS422 at 4800bps, 8 data bits, no parity, 1 stop bit
Data packets
Encapsulated within a NMEA0183 data message
USB Interface

USB Versions USB 1.0, 1.1, 2.0 and later
USB Type-A connector
USB devices USB mass storage device
File system FAT or FAT32
Log files
All good NMEA sentences and encapsulated Seatalk data packets are logged as received with filename extension .TSV.
User interfaces

Power LED
Power good / low voltage
NMEA Ch1 and Ch2 LEDs
Good/bad message received
USB OK / USB write /USB error code
Push switch
Start / stop logging data

IP30 / NEMA 1
Complies with 89/336/EEC Electromagnetic Compatability Directive amended by 92/31/EEC and 93/68/EEC, and 72/23/EEC Low Voltage Equipment Directive amended by 93/68/EEC.
Compliant with Part 15 of the FCC rules.
We comply with the WEEE components. When this product comes to the end of its life, please contact us aboout returning it to us for recycling.

Radio and Television Interference

This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

  • Reorient or relocate the receiving antenna.
  • Increase the separation between the equipment and receiver.
  • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
  • Consult the dealer or an experienced radio/TV technician for help.

The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the user’s authority to operate this equipment.