NM-251B    Speed Log pulses to NMEA-0183 Converter (User Guide)
 
Introduction, , Input, Outputs, Connections Dip switces, LED Indicators,
Specifications, Downloads,
Price ... 240.00 EURO
 
Configuration - Jumper & DIP switches



ID

Status

Description

J1

Short

Configures input circuit for connection to a “closing” contact output (default). A 5V dc signal is applied then from the input to the Log’s closing contact to evaluate its state. Isolation is achieved then via Log’s closing contact interface (e.g. relay)

J2

Open

J3

Short

J4

Open

J1

Open

Configures input circuit for connection to an optocoupler output Log. Input is then optically isolated from LOG.

J2

Open

J3

Open

J4

Open

SW-1 to SW-4


Selection of ppm (user selectable: see table 2).

J5(1-2)

Short

Use of microcontroller (do not change)

J6(1-3)

Short

Use of Out5 (do not change)


The NM-251B can be configured to be connected to speed logs with a 100/200/300/400/500 pulses per mile. This can be achieved by setting dip-switches 1-4 at SW1 (refer to composite assembly figure 4).
 

Description

SW1-1

SW1-2

SW1-3

SW1-4

Closing contacts 100ppm

OFF

OFF

OFF

OFF

Closing contacts 200ppm (default)

ON

OFF

OFF

OFF

Closing contacts 300ppm

OFF

ON

OFF

OFF

Closing contacts 400ppm

OFF

OFF

ON

OFF

Closing contacts 500ppm

OFF

OFF

OFF

ON



LED Indicators

Inb LED

ON: LOG Conversion Mode. Signal of Ina port is converted to NMEA signal. Inb input port is not available

Ina LED

Out 1/2 LED

Flashing indicates data transmission to output port 1 and 2

Out 3/4 LED

Flashing indicates data transmission to output port 3 and 4

OUT 5 LED

Flashing indicates data transmission to output 5



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