Oceanic Docs

The Oceanic Systems Tilt Trim Adaptor is designed to monitor a 4–20mA trim sensor, and supply output on the NMEA2000® network. Multiple units can be used in conjunction with each other when monitoring multiple tilt trims. The Tilt Trim Adaptor is designed to be located in a dry and protected location. It is very important that it is installed and set up correctly according to this manual. Please read and follow the installation and setup instructions carefully to achieve the best results.

The information in this manual corresponds to firmware revision 1.0.0

The NMEA2000® 4925 4-20mA Tilt Trim Adaptor has the following features:

• 4-20mA Trim Tab input conversion to percentage with ± 1% full scale deflection
• Multiple 4925 units can be configured to supply Trim Tab Status for up to 8 engines
• Heartbeat blue LED confirming NMEA2000® transmission
• Faulty sensor/connection detection (under or over current)
• NMEA2000® micro C interface plug
• Panel mounting

You should find the following items in the 4925 shipping box:

• 1 x 4925 4-20mA Tilt Trim Adaptor
• 1 x 4925 User Manual

The unit should be mounted to a flat surface using 4 mounting screws. The unit dimensions and mounting hole’s locations are shown on the following drawing:

The unit is connected to the NMEA2000® network by the 5 way micro C plug on the front. Carefully attach the network drop cable to this plug and hand tighten until it is fully seated. Take care to match the orientation of the pip inside the socket to the recess inside the drop cable socket. The other end of the drop cable should be connected to a suitable Tee connector on the NMEA2000® network backbone cable.

The connections for the sensor is as follows:

The device is configured using the left hand rotary switch, labelled 'Config'. Before use the unit must be calibrated to the sensor.

1. Ensure that the trim sensor is in the zero (Full Down) position
2. Turn the 'Config' Rotary Switch to Position 'E'
3. Hold a magnet over the label marking 'Magnet'
4. The Blue LED will light for 2 seconds. The zero position is now calibrated
5. Return the config switch to the 0 position

1. Ensure that the trim sensor is in the 100% (Full up) position
2. Turn the 'Config' Rotary Switch to Position 'F'
3. Hold a magnet over the label marking 'Magnet'
4. The Blue LED will light for 2 seconds. The 100% position is now calibrated
5. Return the config switch to the 0 position

For a single trim tab system, set the device instance to 0. In systems where there is more than 1 trim tab sensor, set the additional device instances to n+1.

For example; in a 2 trim tab system set Port = 0 and Starboard = 1.

For example; in a 3 trim tab system set Port = 0 and Center = 1, Starboard = 2.

The data will be made available on instance 0, for all trim tabs.

The 4925 4-20mA Tilt Trim Adaptor is powered from the NMEA2000® network and transmits data from the Trim sensors using the PGNs detailed in the Technical Specifications section.

• 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. If the unit is loose, tighten the mounting screws
• Check the security of the cables connected to the NMEA 2000 connector, tighten if necessary
• Check the security of the cables connected to the Wago connector

As Oceanic Systems are constantly improving their products specifications are subject to change without notice. Oceanic 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.

The Tilt Trim Status PGN has been adapted, maintaining compatibility with the NMEA2000 specification to allow more than 2 tilt trims. The PGN format is as shown in the table below: