INTRODUCTION The Offshore System’s NMEA2000® 3478 Relay Output Unit 8 is designed to control up to 8 seperate isolated DC or AC circuits from controllers on the NMEA2000® network. This unit is designed to operate in a protected marine environment such as an engine room. It is very important that it is installed and set up correctly according to this manual.
INSTALLATION 2.1 UNPACKING THE BOX You will find the following items in the 3340 shipping box: 1 x 3478 NMEA2000® Relay Output Module 8 1 x 3478 User Manual (This document) 2.2 MOUNTING THE UNIT The unit should be mounted to a flat surface using 4 x M4 mounting screws. The unit dimensions and mounting hole locations are shown on the following drawing.
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The cables from the power-source to the external sockets are connected using the 6 x 2way WAGO Cage Clamp terminal block. The wire should be stripped for 8mm and then the cage clamp opened with a small screwdriver in the slot above the wire connection. Then simply insert the wire into it’s connection slot and release the cage clamp by removing the small screw driver.
CONFIGURATION It is possible to install a number of 3478 Relay Output Modules (or Switch Bank Modules) on a NMEA2000® network so they need to each have a unique Device Instance Address which is set using the two small rotary switches on the front of the unit. Valid Device Instances are “00”...
OPERATION The 3748 unit operates each relay as commanded. When a relay is operated then the matching green LED in front of the WAGO terminal block is illuminated. 6 of 12...
MAINTENANCE ● Clean the unit with a soft cloth. ● Do not use chemical cleaners as they may remove paint or markings or may corrode the enclosure or seals. ● Ensure that the unit is mounted securely and cannot be moved relative to the mounting surface.
As Offshore Systems are constantly improving their products specifications are subject to change without notice. Offshore System’s products are designed to be accurate and reliable however they should only be used as aids to navigation and not as a replacement for traditional navigation aids and techniques.
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Electrical and Mechanical Parameter Value Comment Operating Voltage 9 to 32 Volts DC Voltage Power Consumption 30 - 340mA Average Operating Load Equivalence Number 3 -7 Reverse Battery Protection Indefinately Load Dump Protection SAE J1113 Size 143x113x53mm Weight 300 grams Environmental Parameter Value...
TROUBLESHOOTING/FAQ Please note that below are some FAQ/Troubleshoot Questions. If none of these help or apply, then please don’t hesitate to contact Technical Support. No LEDs illuminated on front panel Check NMEA2000 network cable connection and network power NMEA2000 control device not switching relays Check Device Instance Switches match the on command settings required by the control device...
Statements made by any person, including representatives of Offshore Systems, which are inconsistent or in conflict with the terms of this Limited Warranty, shall not be binding upon Offshore Systems unless reduced to writing and approved by an officer of Offshore Systems.
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