NMEA 2000 PC Interface (using the Actisense Comms API) NGT-1-USB (Hardware revision A) Installation Manual Issue 1.
NMEA 2000 PC Interface - NGT-1-USB Contents Important notices Notices Foreword Introduction Technical features Software updates Connecting devices together 4 4 4 4 5 5 5 Connections Connecting to the NMEA 2000 Network 6 7 Driver Installation Guide Specifications Troubleshooting guide 7 8 9 The NMEA 2000 standard NMEA 2000 connections Status LEDs Product order codes Company Information © 2009 Active Research Limited 5 7 9 10 10 Page 3
Important notices Foreword Actisense and the Actisense logo are registered trademarks of Active Research Limited. All rights are reserved. The contents of this manual may not be transferred or copied without the expressed written permission of Active Research Limited. All other trademarks are the property of their respective owners.
NMEA 2000 PC Interface - NGT-1-USB Technical features High-speed 32-bit ARM processor capable of up to 40 million instructions per second. Flash ROM technology that supports automatic programming for quick and easy updates, 10,000+ erase cycles and a 10-year Data Retention provides carefree user configuration. On-chip memory store allows buffering of short term NMEA data, allowing the unit to smooth short-term peaks in the NMEA data flow.
Connections 1 3 2 4 Figure 1 – All external connections Figure 1 shows an internal view of the NGT-1-USB Printed Circuit Board (PCB). 1. NMEA 2000 Interface A five way screw terminal block is supplied for connecting the NMEA 2000 cable. The CAN interface is fully compatible with the NMEA 2000 standard. Actisense supplies a pre-fitted four-core screened cable for the NMEA 2000 connection, fitted with a male micro-fit connector.
NMEA 2000 PC Interface - NGT-1-USB CAN Network Connecting to the NMEA 2000 Network CAN Lo CAN Hi Shield NET COM NET SUP Figure 2 – NMEA 2000 connections NMEA 2000 connections The Actisense NGT-1-USB is designed to be connected to the vessel’s NMEA 2000 network using the supplied, pre-fitted Actisense cable.
Specifications Parameter Conditions Min. Max. Unit 8 35 V Supply voltage = 12v 26 30 mA Supply voltage = 24v 16 18 mA Supply Supply voltage Supply current (see note 1) NMEA 2000 CAN Bus line (CAN-H; CAN-L) Transmitter Recessive bus voltage VTXD = VDD; no load. 2.0 3.0 V Dominant bus voltage CAN-H VTXD = 0.8V 2.75 4.5 V Dominant bus voltage CAN-L VTXD = 0.8V 0.5 2.
NMEA 2000 PC Interface - NGT-1-USB Troubleshooting guide This guide will concentrate on all relevant troubleshooting issues above simple cable connection faults. Therefore, the cables between the NGT-1-USB hardware and any other devices should be checked as a matter of course, before continuing with this guide. Status LEDs The NGT-1-USB hardware has two bright LEDs that can be seen through the case to indicate when data is received from either the USB device or NMEA 2000 network connection.
Product order codes NGT-1-USB NGT-1-ISO NMEA 2000 ↔ USB Interface Standard version required to connect the NMEA 2000 network to a USB port (on a computer running Actisense certified software) NMEA 2000 ↔ Serial Interface with ISO-Drive Special version required to connect the NMEA 2000 network to a serial port (on a computer running Actisense certified software) Company Information Active Research Limited Unit 5 Wessex Trade Centre Ringwood Road Poole Dorset.
The NGT-1-USB enables software certified to work with the Actisense interface standard to talk to devices on an NMEA 2000 network. NMEA 2000 network data is freely available to any Actisense certified PC software to display. As an NMEA certified firewall, the NGT-1 allows NMEA 2000 data to be sent from the PC to control any NMEA 2000 devices on the network.
