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NMEA Data Combiner

NDC-3-B

User Manual

Issue 1.31

 Multiple talker interface for use with the NMEA 0183 standard.

Serial-data networking of marine electronic devices / instruments

 Personal computer (RS232) interface to NMEA 0183 standards

Summary of content (12 pages)

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NMEA Data Combiner NDC-3-B User Manual Issue 1.31   Multiple talker interface for use with the NMEA 0183 standard.
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NMEA Data Combiner - NDC-3-B Contents Important Notices Notices Foreword Introduction General features 4 4 4 4 5 Technical features Software updates Connecting devices together 5 5 6 Connections Connecting to NMEA devices 7 8 Other Connections 9 4 NMEA 0183 data input ports An NMEA 0183 data combined output port A PC compatible RS-232 bi-directional port The basics The NMEA signals The different NMEA standards NMEA 0183 Inputs NMEA 0183 Output Connecting to a Personal Computer Connecting to the
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Actisense™ Important Notices Foreword The Actisense™ NMEA Data Combiner (NDC-3) is intended for use in a marine environment, primarily for below deck use. If the unit is to be used in a more severe environment, such use may be considered misuse under the seller’s warranty. Actisense™ recognises that instructions are often skipped, so we have aimed to write this document in an informative, yet direct manner that will aid the user. We have tried to cover all the points a typical user may need to know.
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NMEA Data Combiner - NDC-3-B General features 4 NMEA 0183 data input ports Each NMEA 0183 input port has a priority level. This is ﬁxed to the logical order that matches the port numbers, i.e. port 1 has the highest priority and port 4 has the lowest. An NMEA 0183 data combined output port This output combines the input data into one standard NMEA output. The NMEA inputs and output have the same baud rate.
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Actisense™ Connecting devices together The basics NMEA data is transmitted from an information source such as GPS, depth sounder, gyro compass etc. These data sending devices are called “Talkers”. Equipment receiving this information such as a chartplotter, radar or NMEA display is called a “Listener”. Unfortunately, only one Talker can be connected on to a single NMEA 0183 system at any one time.
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NMEA Data Combiner - NDC-3-B Connections NDC-3-B NMEA DATA COMBINER 99999 Figure 1 – All external connections The NMEA Data Combiner (NDC-3) has screw-terminal “Phoenix” type external connections for: 1. Four NMEA 0183 inputs. All NMEA 0183 inputs are of the differential optoisolated type and use the unique Actisense™ low current drain circuitry (2mA @ 2.
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Actisense™ Connecting to NMEA devices �� NMEA DATA COMBINER � � NDC-3-B �� 99999 � �� Figure 2 – NMEA 0183 connections NMEA 0183 Inputs The NMEA 0183 differential opto-isolated inputs are designed to handle a variety of NMEA 0183 device output speciﬁcations.
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NMEA Data Combiner - NDC-3-B Other Connections NMEA DATA COMBINER NDC-3-B 99999 � � � �� Figure 3 – RS-232 and Battery connections Connecting to a Personal Computer The RS-232 port can be connected to a PC communications port using a cable conforming to the following speciﬁcation: 1. A D-type female (socket) connector for the PC end of the cable 2. A minimum of 3 cores are required in a shielded cable.
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Actisense™ Troubleshooting guide This guide will concentrate on all relevant troubleshooting issues above simple cable connection faults. Therefore, the cables between the NDC-3 hardware and any other devices should be checked as a matter of course, before continuing with this guide. Diagnostic LED The NDC-3 hardware supports a tri-colour diagnostic LED that indicates the current operating mode of the hardware, or if an error has been detected during the self-test initiation process.
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NMEA Data Combiner - NDC-3-B Speciﬁcations Parameter Conditions Min. Max. Unit 8 35 V Supply voltage = 12v 26 30 mA Supply voltage = 24v 16 18 mA -15.0 0.5 V 4.0 15.0 V 2.0 30 mA 1.8 2.0 V 0.0 0.5 V 4.8 5.2 V - 32 mA 50 55 mA 4.8 kbit/sec 1.0 100 ms -15 +15 V LOW 0.8 1.2 V HIGH 1.7 2.
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Actisense™ Company Information Active Research Limited 5, Wessex Trade Centre Ringwood Road Poole Dorset UK BH12 3PF Telephone: Fax: 01202 746682 (International : +44 1202 746682) 01202 746683 (International : +44 1202 746683) Actisense™ on the Web: For advice, support and product details E-mail: Website: support@actisense.com www.actisense.com Active Research on the Web: For specialist consultancy and customisation E-mail: Website: support@activer.com www.activer.