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1 Galvanically opto-isolated NMEA 0183 "Listener" data input
for complete isolation of the input from ground, meeting all
the specifications of the latest NMEA 0183 / IEC61162-1&2
specifications.
6 ISO-Drive "Talker" outputs, compatible with both NMEA 0183
(RS422 / RS485) and RS232 listeners.
Compatible with NMEA 0183 standard and "HS" (AIS) baud rates,
and speeds well in excess of this for special applications.
NMEA Buffer
NBF-2-A
User Manual
Issue 1.03
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Summary of Contents for Actisense NMEA Buffer NBF-2-A
- Page 1 NMEA Buffer NBF-2-A User Manual Issue 1.03 1 Galvanically opto-isolated NMEA 0183 “Listener” data input for complete isolation of the input from ground, meeting all the specifications of the latest NMEA 0183 / IEC61162-1&2 specifications. 6 ISO-Drive “Talker” outputs, compatible with both NMEA 0183 ...
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Page 3: Table Of Contents
NMEA Buffer - NBF-2-A Contents Important Notices Notices Foreword Introduction NMEA 0183 Introduction Electrical specifications Technical features Connecting devices together The basics The NMEA signals The different NMEA standards Connections Input Connections NMEA 0183 Input Connecting to the battery supply Output Connections NMEA 0183 / RS422 Outputs Troubleshooting guide... -
Page 4: Important Notices
Actisense NMEA Buffer product and any related software programs. The Actisense NMEA Data Buffer (NBF-2) is intended for use in a marine environment, primarily for below deck use. Introduction If the unit is to be used in a more severe environment, such use may be considered misuse under the seller’s... -
Page 5: Nmea 0183 Introduction
The NBF-2 is equipped with 6 ISO-Drive outputs. ISO- Drive output technology creates a driver, unique to Actisense, that is isolated to 1500 volts. ISO-Drive creates a completely floating talker output, making safe connection to a PC an easy task. -
Page 6: Connecting Devices Together
Talkers connected together, potential overheating and damage to the driver circuits. using the Actisense NMEA Data Multiplexer “NDC” series of instruments. If the required system has multiple NMEA To connect a new type differential device to an old type Talker device of the same type (e.g. -
Page 7: Connections
The NMEA 0183 input is of the differential opto- 1. To complete the NMEA 0183 standard all device isolated type and uses the unique Actisense low interconnection NMEA cables used should meet the current drain circuitry (2mA @ 2.0v) to conform in full... -
Page 8: Input Connections
“Tx” pin (Pin 3 on 9-pin D-type connector) to the NBF’s the Actisense NBF-2 conforms in full to the NMEA 0183 “+/A” and its “Ground” (Pin 5 on D-type) to the “-/B”. -
Page 9: Output Connections
NMEA Buffer - NBF-2-A Output Connections NMEA Listener 4 NMEA Personal Listener 3 Computer G NMEA NMEA Listener 2 Listener 5 NMEA Listener 1 NMEA BUFFER NBF-2-A 99999 Figure 3 – Output connections NMEA 0183 / RS422 Outputs In practice, this is rare, as most equipment is designed to work well below this voltage level. -
Page 10: Troubleshooting Guide
Troubleshooting guide This guide will concentrate on all relevant troubleshooting issues above simple cable connection faults. Therefore, the cables between the NBF-2 hardware and any other devices should be checked as a matter of course, before continuing with this guide. Problem / Error condition Required user response Ensure that correct polarity of the NMEA connections have... -
Page 11: Specifications
NMEA Buffer - NBF-2-A Specifications Parameter Conditions / Note Min. Max. Unit Supply Supply voltage (note 1) Supply voltage = 12v Supply current no-load / full load (note 2,3) Supply voltage = 24v OPTO Isolated Flexible Input Logical ‘1’ / stop bit -15.0 Input voltage between +/- Logical ‘0’... -
Page 12: Company Information
BH12 3PF Telephone: 01202 746682 (International : +44 1202 746682) Fax: 01202 746683 (International : +44 1202 746683) Actisense on the Web: For advice, support and product details E-mail: support@actisense.com Website: www.actisense.com “Actisense” is a registered trademark of Active Research Limited.
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