1. Introduction
The RS11 Engine Data Converter converts tachometer signals and analog gauge voltages from virtually any engine into
CANbus digital messages compatible with J-1939 and NMEA 2000 protocols. It is configurable for either single or dual en-
gine installations. The user must configure the RS11 for the desired data and calibration parameters such as pulses/rev, ana-
log scale factors, etc. Configuration is performed via a Serial (RS-232) PC interface which also serves as an output data
monitor, if desired. Output messages are applied to the CANbus, which can then be viewed by any compatible display.
Power for the RS11 is supplied by the CANbus.
2. General
The RS11 is designed for versatile interfacing to almost any type of analog engine sensor or gauge commonly used on marine
or automotive engines. It has two RPM (tach) inputs, four analog (gauge) inputs and supports both 12 and 24 volt systems.
The analog inputs can be assigned all to one engine or be split between two engines. Multiple RS11's can be installed on the
same CANbus.
The RS11 should generally be used in conjunction with existing analog gauges rather than as a replacement for them. This is
because most sensors are “energized” by the existing engine gauges. The RS11 is designed to “piggyback” onto these gauges
rather than replace them. The RS11 inputs are ‘passive’ in that they read sensor/gauge voltages but do not power them.
The RS11 supports messages most commonly used by marine and industrial CANbus engines. The user must perform an
initial configuration of the unit to suit the particular engine(s). This consists of selecting the specific information to be sent
and entering proper calibration factors. Configuration is done through a PC Serial interface and Setup Utility (see Appendix
D) provided with the unit.
Typical installations for a single and dual engine are shown in Figure 1. For the single engine case, one RPM input is not
used, and all analog inputs are available for that engine. In the dual engine case, the analog inputs must be divided between
the two engines. This usually means each engine only gets two analog inputs. To get four analog inputs to each of two en-
gines, you can use two RS11's, one for Port Instance and the other for Starboard Instance.
Model RS11 v3.0
CANbus Engine Data Converter
NoLand Engineering, Inc.
TABLE of CONTENTS
1. Introduction
2. General Description
3. Installation
4. Operation
5. Technical Specifications
6. Warranty
Appendix A - CANbus Messages
Appendix B - Programming Instructions
Appendix C - Gauge/sensor calibration examples
Appendix D - RS11 Setup Utility
