Actisense NMEA 2000 User manual

NMEA 2000 to NMEA 0183
Gateway
NGW-1-ISO
(Hardware revision A)
Installation Manual
Issue 1.00
 Gateway between the NMEA 2000 network and an NMEA 0183 device, or
the serial port of a computer running NMEA 0183 compatible software
 Complete electrical isolation (of 1500 volts) between NMEA 0183 serial port
and the NMEA 2000 connections
 Fully congurable via serial port or through the NMEA 2000 network

NMEA2000 to NMEA0183 Gateway - NGW-1-ISO
Page 3© 2009 Active Research Limited
Contents
Important notices 4
Notices 4
Foreword 4
Introduction 4
Technical features 5
Software updates 5
Connecting devices together 5
The NMEA 2000 standard 5
Connections 6
Connecting to the NMEA 2000 network 7
NMEA 2000 connections 7
Connecting to an NMEA 0183 device 7
NMEA 0183 connections 7
Connecting to an RS232 (PC) port 8
RS232 Connections 8
Connecting to an RS485 (IEC 61162-2) listening device 8
RS485 Connections 8
Specications 9
Troubleshooting guide 10
Status LEDs 10
Product order codes 11
Company Information 11

Page 4© 2009 Active Research Limited
Important notices
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 express written
permission of Active Research Limited. All other
trademarks are the property of their respective owners.
The Actisense NMEA 2000 to NMEA 0183 Gateway
(NGW-1-ISO) is intended for use in a marine environment,
primarily for below deck use. If the NGW-1-ISO is to be
used in a more severe environment, such use may be
considered misuse under the seller’s guarantee.
The NGW-1-ISO has been certied to comply with the
European directive for Electro-Magnetic Compatibility
(EN60945), and is appropriately CE marked. Operation
of the unit should be in conjunction with appropriate
CE approved shielded connectors and cabling used in
accordance with the CE directive EN60945. Any EMC
related issues should be reported to Active Research
immediately to allow the company to rectify or resolve
EMC related problems in accordance with its obligations
under EN60945.
If the unit is misconnected so that compliance failure
occurs, the company shall not be held responsible for
compliance failure until suitable EMC guidelines for
connection are seen to have been taken.
Notices
When using this document, please note the following:
The products described in this manual and the
specications thereof may be changed without prior notice.
To obtain up-to-date information and/or specications,
contact Active Research Limited or visit the Actisense
website (www.actisense.com).
Active Research Limited will not be liable for infringement
of copyright, industrial property right, or other rights of a
third party caused by the use of information or drawings
described in this manual.
Active Research Limited will not be held responsible for
any damage to the user that may result from an accident
during operation of this unit when used in accordance with
this document.
Foreword
At Active Research Limited, we recognise that instructions
are often skipped, so we have aimed to write this
document in an informative and direct manner that will aid
the user. We have covered all the points a typical user
needs to know.
Please read all sections before installing and using the
NGW-1-ISO, and any referenced software programs.
Introduction
The NGW-1-ISO allows NMEA 0183 electronic equipment
to be connected to a vessel’s NMEA 2000 network. This
can allow equipment installers to adopt the NMEA 2000
network early, whilst connecting any existing NMEA 0183
devices to the new bus standard.
The NMEA 2000 network can reduce installation costs
of marine equipment and greatly reduce a boat’s wiring
harness complexity, leading to improved reliability and
reduction in unnecessary weight. Now only a single cable
is required from the bridge to the engines, sensors and all
other NMEA 2000 instruments on the boat
NMEA 2000 uses the “CAN Bus” system (prevalent in
most modern cars), to provide the quality and security of
data transmissions that the NMEA 0183 bus can never
hope to provide. This enables NMEA 2000 products to
achieve better transmission reliability in the passage of
data through the vessel.
The NMEA Gateway can transfer data from an NMEA
0183 source and place that data on the NMEA 2000 bus,
or it can take NMEA 2000 data from the NMEA 2000 bus
and make it available to the NMEA 0183 instrument.
Full information on the complete Actisense product range
and supporting software packages can be found on the
Actisense website (www.actisense.com).

NMEA2000 to NMEA0183 Gateway - NGW-1-ISO
Page 5© 2009 Active Research Limited
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 conguration.
On-chip memory store allows buffering of short term
NMEA data, allowing the unit to smooth short-term peaks
in the NMEA data ow.
Fully congurable via the serial connection or over the
NMEA 2000 network allowing optimisation of the serial
interface to better suit the system it is a part of.
NMEA 2000 interface offers 2500 volts of opto-isolation,
protecting the system even during the most extreme
fault conditions and fully compliant with the NMEA 2000
standard for interfacing with the NMEA 2000 network.
NMEA 2000 network powered to offer easy installation
with no need for a direct connection to the vessels main
battery supply. The NGW-1-ISO takes all its power from
the NMEA 2000 network connection and contains a clever
built-in power isolator to power its serial circuitry without
the need of an extra battery source. This creates total
isolation between the serial and NMEA 2000 circuitry
to completely eliminate the risk of ground loop faults
occurring and the resulting damage.
Software updates
The NGW-1-ISO’s built-in rmware is held in “ash”
memory, allowing quick and easy upgrades using either
the latest NGW-1-ISO ActiPatch, or alternatively the
NMEA 2000 Gateway Conguration Tool running on a
PC connected to the NGW-1-ISO.
It is our policy to provide these updates free on the
Actisense website (www.actisense.com), so that the
NMEA 2000 to NMEA 0183 Gateway (NGW-1-ISO) can
be further developed over time, and should there be any
bugs reported in the rmware, they can be promptly xed
without the unit requiring to come out of commission.
Connecting devices together
The NMEA 2000 standard
The NMEA 2000 system is a low-cost data network
operating at 250 kbits/sec utilizing the Controller Area
Network (CAN). Multiple devices can be connected
together on a single trunk cable to simply and easily share
information between themselves.
NMEA 2000 uses a shielded cable and a ”differential”
signalling scheme, whereby two wires are used to transmit
the NMEA data named CAN High and CAN Low. These
connections will be labelled as “NET HI” and “NET LO”
respectively. Power is also supplied through the NMEA
2000 cable named NET Supply and NET Common. These
connections will be labelled “NET SUP” and “NET COM”
respectively on the PCB.
Please refer to the Connecting to the NMEA 2000
Network section for an example of these connection
methods.

Page 6© 2009 Active Research Limited
Figure 1 shows an internal view of the NGW-1-ISO
Printed Circuit Board (PCB).
1. NMEA 2000 Interface
A ve 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-tted four-core screened
cable for the NMEA 2000 connection, tted with a
male micro-t connector. The colour codes used for
this cable are:
Wire colour NMEA 2000
Shield / Screen SHIELD
Blue NET LO
White NET HI
Black NET COM
Red NET SUP
If you need to use your own NMEA 2000 cable, the
ve way screw terminal block is provided within the
NGW-1 to allow easy connection, along with a spare
cable gland that should be tted on to the new cable
to help maintain the water protection level.
Any such cable is required to conform in full to
the NMEA 2000 specication and be no longer
than 6 metres (maximum drop length).
2. NMEA 2000 indicator LED
This LED ashes when NMEA 2000 data set to be
transferred is received by the NGW-1-ISO. It can be
clearly seen through the NGW-1-ISO’s translucent
lid when the case is closed.
3. Serial opto-isolated input.
Two screw terminals are provided to connect the
serial input. The serial input is of the differential opto-
isolated type and uses the unique Actisense low
current drain circuitry (2 mA @ 2.0 V).
4. Serial ISO-Drive output.
Three screw terminals are provided to connect to the
serial ISO-Drive output. The serial output comprises
of three connections: ‘+’, ‘-‘ and ‘Ground (GND)’.
The colour codes used for this cable are:
Wire colour NMEA 0183
Shield / Screen SHIELD
Blue ISO Out B / -
White ISO Out A / +
Black Opto In B / -
Red Opto In A / +
In most installations, this ground (GND) can be
left disconnected. It is useful where an “RS485” or
“IEC61162-2” 3 terminal type connection is required,
or where ground continuity is needed between
source and target connections. No damage will be
caused by connecting to this GND in error. Always
follow the connection diagrams shown in this manual
to ensure correct operation.
5. Serial data indicator LED
This LED ashes when serial data set to be
transferred is received by the NGW-1-ISO. It can be
clearly seen through the NGW-1-ISO’s translucent
lid when the case is closed.
To open the NGW-1-ISO, remove the two screws in the
base of the unit, then slide off the top of the case. The
cable glands need to be slid out from the top of the case
in order to access the internal connections. The NGW-1-
ISO circuitry will be left attached to the base of the unit
and the two supplied cables attached to their connectors.
Note: When opening the NGW-1-ISO case, be aware
that the circuitry inside is not 100% protected against
static electricity. Please ensure that, when opening
the case, you use precautions against static damage
by only touching the connector block and by holding
the unit by its plastic base. In this way, the risks of
static damage will be minimised.
Connections
Figure 1 – All external connections
3
1
25
4

NMEA2000 to NMEA0183 Gateway - NGW-1-ISO
Page 7© 2009 Active Research Limited
NMEA 2000 connections
The Actisense NGW-1-ISO is designed to be connected
to the vessel’s NMEA 2000 network using the supplied,
pre-tted Actisense cable.
If a different length cable is required, an NMEA 2000
certied cable of the required length (maximum 6 metres)
should be connected to the vessel’s NMEA 2000 network
using a standard NMEA 2000 connector.
The standard wiring connection can be seen in Figure 2.
Note:
1. Wire colours are for guidance only. The colours given
relate to the supplied Actisense cable and the NMEA
2000 standard cable denition.
Connecting to the NMEA 2000 network
Figure 2 – NMEA 2000 connections
CAN Network
NET COM
Shield
CAN Hi
CAN Lo
NET SUP
NMEA 0183 connections
The Actisense NGW-1-ISO is designed to be connected
to an NMEA 0183 device using the supplied, pre-tted
Actisense cable.
If a different cable is required, the cable specication
(quality) and length should be considered. The maximum
length of such a cable is dependent on the input & output
specications of the NMEA 0183 device and cable quality.
The NGW-1-ISO has a very sensitive input and powerful
output to help maximise the working cable length.
The standard wiring connection can be seen in Figure 3.
1. Wire colours are for guidance only. The colours given
relate to the supplied Actisense cable.
Connecting to an NMEA 0183 device
Figure 3 – NMEA 0183 connections
Do not connect
NMEA
Listener
NMEA
Talker
B/-
A/+
B/-
A/+
GND
TX
GND
RX
/
/
/
/

Page 8© 2009 Active Research Limited
Connecting to an RS232 (PC) port
Figure 4 – Personal Computer / RS232 port connections
RS232 Connections
The NGW-1-ISO can be connected to a PC
communications (RS232) port using the supplied cable
and a connector with the following specication:
1. A minimum of 3-cores are required in a shielded
cable. Higher quality cable will naturally yield higher
performance / higher Signal-to-Noise Ratio (SNR).
Most typical cables have two twisted pairs inside. In
this case, use one pair for the TX line and one for the
RX line. Use the spare wire in each pair as ground,
and connect the cable shield to ground only at the
computer end.
2. A D-type female (socket) connector for the PC end of
the cable.
3. The OUT +/A of the NGW-1-ISO should be
connected to the RX of the computer (standard
D-type, pin 2) and the NGT-1-ISO IN +/A should be
connected to the TX of the computer (pin 3).
4. Connect the IN -/B and OUT -/B together and
connect to the PC’s serial port ground (pin 5).
Connecting to an RS485 (IEC 61162-2) listening device
Figure 5 – RS485 / IEC 61162-2 port connections
RS485 Connections
The ISO-Drive output of the NGW-1-ISO can be connected
to an RS485 Listener that requires differential drive plus a
ground connection as shown in gure 5.
The standard wiring connection can be seen in Figure 5.
1. Wire colours are for guidance only. The colours given
relate to the supplied Actisense cable.
Personal
Computer
( 9 PIN 'D'
RS232
Port)
Do not
connect
RX
Pin 2
GND
Pin 5
TX
Pin 3
RS485
Listener
A/+
B/-
GND

NMEA2000 to NMEA0183 Gateway - NGW-1-ISO
Page 9© 2009 Active Research Limited
Table 2 – NGW-1-ISO specications
All specications are taken with reference to an ambient temperature (TA) of +25°C.
Note:
1. Current consumption measured under no-load conditions
Specications
Parameter Conditions Min. Max. Unit
Supply
Supply voltage 8 35 V
Supply current (see note 1) Supply voltage = 12v 26 30 mA
Supply voltage = 24v 16 18 mA
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 2.25 V
Recessive differential output voltage VTXD = 2V; no load -500 50 mV
Dominant differential output voltage 40Ω < RL < 60Ω 1.5 3.0 V
Short circuit output current CAN-H VCAN-H = -5V - -200 mA
Short circuit output current CAN-L VCAN-H = -40V, +40V. (see note 2) - 200 mA
NMEA 2000 CAN Bus line (CAN-H; CAN-L) Receiver
CAN-H, CAN-L common-mode input
resistance 5 50 KΩ
Differential input resistance 20 100 KΩ
Opto-isolated Input
Input voltage tolerance Continuous operation -15 +15 V
Short term operation (< 1 sec) -35 +35 V
Differential input voltage Required level for data to be detected 1.8 - V
Input current - 2 mA
Input to Ground
Baud rate Congurable Baud rate 4800 230400 bps
ISO-Drive Output
Output current RS485 / RS422 / RS232 compatible - 20 mA
Differential output voltage 100 ohm load 2.1 - V
Output to Ground Full Galvanic isolation protection - 1500 V
Baud rate Congurable Baud rate 4800 230400 bps
General
Ambient operating temperature -20 +70 °C

Page 10© 2009 Active Research Limited
Troubleshooting guide
This guide will concentrate on all relevant troubleshooting issues above simple cable connection faults. Therefore, the
cables between the NGW-1-ISO hardware and any other devices should be checked as a matter of course, before
continuing with this guide.
Status LEDs
The NGW-1-ISO hardware has two bright LEDs that can be seen through the case to indicate when data is received
from either the NMEA 0183 device or NMEA 2000 network connection. It is an important point to note that these two
LEDs can only show when their respective data is RECEIVED; it is not possible to show both transmit and receive
simultaneously on a single colour LED.
These LEDs can be used to debug potential problems. If both an NMEA 0183 ‘talker’ and a ‘listener’ are connected, it
is possible to analyse which is working by disconnecting one of them or by stopping the computer from sending data.
Sequence Description
NMEA 2000 LED does not
ash when the data is received
from the NMEA 2000 network
Check that the NGW-1-ISO is connected to the NMEA 2000 network, that the NMEA
2000 network is operational, and that the required PGN messages are selected for
transfer by using the NGW Conguration Tool.
Serial LED does not ash
when Serial data is being
received
Check that the NGW-1-ISO is connected correctly to the NMEA 0183 device, that
the same Baud rate has been set on both devices, and that the required messages
are selected to be transferred by using the NGW Conguration Tool.
Both LEDs ash together,
once every 10 seconds
Indicates that the NGW-1-ISO is powered but no data is received from either
connection. If data should be being transferred through then check that the required
PGN messages are selected by using the NGW Conguration Tool.
If the error persists, please contact Actisense support to help trace the issue
before considering the return of the product. If Actisense support concludes
that the NGW-1-ISO unit should be returned to Actisense (refer to the Company
Information section), a Returns Number will be issued by the support engineer.
The Returns Number must be clearly visible on both the external packaging
and any documentation returned with the product. Any returns sent without a
Returns Number will incur a delay in being processed.
Table 3 – Diagnostic LED

NMEA2000 to NMEA0183 Gateway - NGW-1-ISO
Page 11© 2009 Active Research Limited
Active Research Limited
Unit 5 Wessex Trade Centre
Ringwood Road
Poole
Dorset. UK
BH12 3PF
Telephone: [phone] (International : [phone])
Fax: [phone] (International : [phone])
Actisense on the Web: For advice, support and product details
E-mail: [email protected]
Website: www.actisense.com
“Actisense” is a registered trademark of Active Research Limited.
Company Information
Product order codes
NGW-1-ISO NMEA 2000 ↔ Serial Interface with ISO-Drive
Standard version required to connect the NMEA 2000 network to an NMEA 0183
device or computer serial port
NGW-1-USB NMEA 2000 ↔ USB Interface
Special version required to connect the NMEA 2000 network to the USB port of a
computer running NMEA 0183 compatible software

NMEA 2000 Connection
•NMEA 2000 network is
opto-isolated from the serial
connection to offer 1500 volts
of protection
•NMEA 2000 current draw
30 mA typical
•Terminal block available for
user cable connection
•Cable length 1.5 metres
Opto & ISO-Drive Connection
• Exceeds all NMEA 0183
input/output specifications
•Compatible with RS422
(NMEA), RS232 & RS485
•Baud rates 4800 to 230400
•Cable length 1.5 metres
System Requirements
•Supported OS’s: Windows
(2000, XP and Vista). Check
website for other versions
•No drivers required
Environmental
•Recommended operating
temperature: -20°C to +70°C
•Splash proof plastic casing
provided with sealing cable
glands certified to IP54
•Stainless steel case screws
•Humidity: 0-80% RH
Guarantee
•3 years return to base
Certifications
•CE (EN60945)
•Tested and certified NMEA
2000 compliant
Specifications
The Actisense NGW-1-ISO allows an
NMEA 0183 device to talk and listen
to NMEA 2000 devices on an NMEA
2000 network.
By translating NMEA 2000 data into
the NMEA 0183 equivalent (and vice-
versa), the NGW-1-ISO enables
information to be shared between
NMEA 0183 devices and any
instrument on the NMEA 2000
network.
The isolating ISO-Drive connection
of the NGW-1-ISO makes it one of
the best and safest ways to connect
your NMEA 0183 device to an NMEA
2000 network.
Just connect and relax, knowing that
Actisense has it secured.
Benefits
•All NMEA 2000 instruments on the
network can see translated NMEA 0183
data sent from NMEA 0183 device
•PC software can receive translated data
from any NMEA 2000 instrument
•Electrical isolation separates the two
networks, protecting against ground
loop faults. This creates a protected
computer and a safe installation
•The NGW-1 device is compatible with
all NMEA 0183 devices (both single-
ended and standard differential types)
®
Active Research Limited, Unit 5 Wessex Trade Centre, Ringwood Road, Poole, Dorset, UK, BH12 3PF
Telephone: [phone] Fax: [phone]
Actisense on the Web: For advice, support and product details
E-mail: [email protected] Website: www.actisense.com
“Actisense” is a registered trademark of Active Research Limited.