The Oceanic Systems 5720 Flow Adaptor Module is designed to report fuel flow and usage over the NMEA2000® network using positive displacement flow meters.
These high accuracy sensors connect directly to the 5720 using IP68 rated standard Deutsch connectors (mating connector kit available separately as P/N 5099). The 5720 is compatible with sensors having a single pulsed output as well as those with a 2-phase quadrature output (for cases where reverse flow must be considered). Additionally high accuracy PT100 temperature compensated sensors are fully supported.
As required, the 5720 may be set up to measure two individual flow rates, consumption data based on flow and return rates or total fluid transferred. This configuration along with sensor parameters and network instances may be made to the flow adapter over the NMEA network.

The information in this manual corresponds to firmware revision 1.0.0

The NMEA2000® Flow Adaptor Module has the following features:

• Up to 2 flow-meter inputs
• Fuel temperature compensation for greater accuracy
• Accepts quadrature signals to detect reverse flow
• User configurable K-Factor for greater sensor compatibility
• Bunkering mode measures total fuel flow
• Live mode calculates ongoing fuel usage from flow and return sensors
• Robust environmentally protected enclosure and connections
• Tri-colour LED shows status and network activity

You will find the following items in the 5270 shipping box:

1 x 5720 NMEA2000® Fluid Flow Adaptor Module

1 x 5720 User Manual (This document)

The unit should be mounted to a flat surface using 4 M4 mounting screws. The unit dimensions and mounting hole locations are shown on the following drawing.

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

The cables from the flowmeter sensors are wired to the 5720 using 6 x 2 way Deutsch DT connectors. Connection to a mating DT socket housing should be made as in the following table:

Typical Connections for Outward flow with thermal compensation:

Before using the 5720 for the first time it needs to be configured with a suitable Oceanic Systems Display Unit.
The following items can be configured on the 5720:

It is possible to install 127 5720 Fluid Flow monitors on a NMEA2000® network. This value must be set to give each sensor a unique address.

The flow rate from the flowmeter connected to terminals 1 to 6 of the Deutsch Connector are reported on PGN 127489 (Engine Parameters, Dynamic) with this instance.

The flow rate from the flowmeter connected to terminals 7 to 12 of the Deutsch Connector are reported on PGN 127489 (Engine Parameters, Dynamic) with this instance.

The temperature from the PT100 sensor connected to terminals 1 and 2 of the Deutsch Connector are reported on PGN 130316 (Temperature, Extended Range) with this instance.

The temperature from the PT100 sensor connected to terminals 11 and 12 of the Deutsch Connector are reported on PGN 130316 (Temperature, Extended Range) with this instance.

This value must be set to correspond with the parameters of the flowmeter connected to terminals 1 to 6 of the Deutsch Connector. Units are pulses per litre.

This value must be set to correspond with the parameters of the flowmeter connected to terminals 7 to 12 of the Deutsch Connector. Units are pulses per litre.

The 5720 Fluid Flow Adaptor is powered from the NMEA2000® network and transmits data from the flow sensors using the PGNs detailed in the Technical Specifications section.
The LED on the front of the unit flashes blue every second to indicate normal operation or red to indicate an error condition. If the unit is connected to a broken network or one with no other devices, the LED will flash blue in a fast flickering pattern until the network is restored.

• 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 Deutsch 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.