SeaTalk NG product loading

The number of products that can be connected to a SeaTalk NG backbone depends on the current draw of each product and the physical length of the backbone cabling.

NMEA 2000LENSeaTalk NGLoad equivalency numberLENProduct loading

NMEA 2000 Load Equivalency Numbers (LEN) are used to express the amount of current that is drawn from SeaTalk NG products (1 LEN = 50 mA). The LEN for each product can be found in the product’s Technical Specification.

Products which have a dedicated power supply connection and are connected to the SeaTalk NG backbone will still have an LEN rating. This is because the product’s NMEA 2000 / SeaTalk NG internal transceiver will still be powered by the SeaTalk NG backbone.

LENs are used to determine the power connection point for the SeaTalk NG backbone.