GNSS Modbus Gateway

In stock (16 items available)
  • Weight
    0.25 kg
  • SKU
    KTA-391

Modbus RTU slave providing precise date, time, position, altitude and speed data from GNSS receiver. Highly configurable.

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The KTA-391 is a Modbus GNSS receiver. Extremely accurate time, position, altitude and velocity data is made available for any Modbus Master (PLC, RTU, SCADA system, etc) to interrogate.

The KTA-391 acts as a Modbus slave over RS-485. All data is available as Modbus holding registers. Two open collector outputs are provided; one gives a pulsed output to synchronise the clock with external equipment, the other indicates a reliable position fix. A status LED is also provided to show lock status. Modbus comms settings can be altered via RS-485 or USB. A PC application is provided as a free download for data analysis and troubleshooting.

The KTA-391 can also act as a Serial Gateway for the NEO-M8 GNSS receiver module. The receiver can then be accessed, evaluate and configured using Ublox's U-center software. 

Magnetic mount active GNSS antenna (3m cable) is included.

Typical Applications:

  • Provide accurate timestamps to a SCADA system for logging
  • Synchronise logging operations across timezones
  • Location mapping and geotagging
  • Altitude readouts for weather observations
  • Precise speed readouts for vehicular sports/activities
  • Direction data for orienteering or navigation
  • Power Supply: 6 to 36VDC
  • Power Consumption: 0.4W
  • 2 x Open Collector Outputs: indicate position fix and to synchronise external clock
  • Protocol: Modbus RTU slave on RS485 and USB
  • Modbus Baud Rate: 2400 - 115200 bps
  • Fast Update Rate: 10Hz (default) to maximum of 18Hz
  • Accurate Returned Data:
    • UTC Date and Time
    • Latitude and Longitude 
    • Altitude
    • Velocity
    • Course over ground (direction)
    • Number of satellites in use
  • Operating Temperature: -20 to 80°C
  • DIN-Rail Mount Enclosure
  • Dimensions: 81L x 25W x 85H (mm)

Faulty Goods and Warranty

Where such goods have been supplied we undertake to repair or replace them as quickly as possible.Prior to returning faulty items, please contact us with a description of the fault as one of our engineers might be able to assist you by resolving the issue over the phone.
A Warranty form must be filled out and returned with any goods.

Our standard warranty period is 12 months from the date of purchase unless stated otherwise.

Other warranty periods:

Labjack Products: 5 Years
Atop Products: 3 Years
MeanWell Products: 3 Years
Terracom Products: 3 Years

Warranty is subject to us being satisfied that a defect was caused by defective workmanship or materials and was not caused by or was not substantially contributed to by other factors beyond our control including incorrect installation, alterations or modifications of the product not recommended by the manufacturer.

Returns Policy

If you are dissatisfied with our goods you may return them within 14 days of the dispatch date. Contact us for an authorisation and we will refund your purchase less shipping costs and restocking fees. All returned goods MUST be in AS NEW condition including ALL PACKAGING and DOCUMENTATION / MANUALS etc.

Please note:

  • The product returned will attract a 20% restocking fee.
  • The customer must pay the delivery costs.
  • Non standard, custom made or a specially manufactured or imported products are not returnable.
  • Semiconductors, books and software are not refundable

Full Terms and Conditions

By placing an order with Ocean Controls, you agree to be bound by our Terms and Conditions of Trade.

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