NM-251A-MUX    
Dual Input NMEA Buffer Splitter With Multiplex Functions

  
Introduction, Operation, Input ports , Output ports, Connections, Power Supply, LED Indicators, 
Dip-switch & Jumper settings, Specifications, Printed Circuit board, Downloads, Certificates
Price ... 240.00 EURO
LED indicators



Ina LED

Flashing every half-second: no input or incorrect polarity.
Flashing randomly: Data overflow at input port 1

Inb LED

Flashing every half-second: no input or incorrect polarity.
Flashing randomly: Data overflow at input port 1

Out 3/4 LED

Flashing indicates data transmission to output port 3 and 4

Out 1/2 LED

Flashing indicates data transmission to output port 1 and 2

Out5 LED

Flashing indicates transmission to Out5 port and the RS-232 interface


DIP switch & Jumper settings
Note: To achieve any of the following configurations a power cycle should be performed after setting the dip-switched on the NM-251A-MUX



Configuration

Input – Output routing

Functionality Description

SW-1

SW-2

SW-3

SW-4

J5

J6

Out

1/2

Out

3/4

RS

232

Out

5

OFF

OFF

OFF

OFF

1-2

1-3

MUX MODE
Combined data at 4.800/8/N/1

Combined data are transmitted to all outputs at 4.800/8/N/1

OFF

OFF

ON

OFF

1-2

1-3

MUX MODE
Combined data at 9.600/8/N/1

Combined data are transmitted to all outputs at 9.600/8/N/1

OFF

OFF

OFF

ON

1-2

1-3

MUX MODE
Combined data at 19.200/8/N/1

Combined data are transmitted to all outputs at 19.200/8/N/1

OFF

OFF

ON

ON

1-2

1-3

MUX MODE
Combined data at 38.400/8/N/1

Combined data are transmitted to all outputs at 38.400/8/N/1

ON

OFF

OFF

OFF

1-2

1-3

SPLIT/MUX MODE

Out1/2 same as INA (4.800/8/N/1)
Out3/4 same as INB (4.800/8/N/1)
Out5 and RS-232 combined data at 4.800/8/N/1

INA

INB

Combined data
At 4.800/8/N/1

ON

OFF

ON

OFF

1-2

1-3

SPLIT/MUX MODE

Out1/2 same as INA (4.800/8/N/1)
Out3/4 same as INB (4.800/8/N/1)
Out5 and RS-232 combined data at 9.600/8/N/1

INA

INB

Combined data
at 9.600/8/N/1

ON

OFF

OFF

ON

1-2

1-3

SPLIT/MUX MODE

Out1/2 same as INA (4.800/8/N/1)
Out3/4 same as INB (4.800/8/N/1)
Out5 and RS-232 combined data at 19.200/8/N/1

INA

INB

Combined data
at 19.200/8/N/1

ON

OFF

ON

ON

1-2

1-3

SPLIT/MUX MODE

Out1/2 same as INA (4.800/8/N/1)
Out3/4 same as INB (4.800/8/N/1)
Out5 and RS-232 combined data at 38.400/8/N/1

INA

INB

Combined data
at 38.400/8/N/1

OFF

ON

OFF

OFF

1-2

1-3

FALLBACK MODE
INA OR INB at 4.800/8/N/1

All outputs connected to INA or INB if no signal applied to INA.
Reception and transmission at 4.800/8/N/1

OFF

ON

ON

OFF

1-2

1-3

FALLBACK MODE
INA OR INB at 9.600/8/N/1

All outputs connected to INA or INB if no signal applied to INA.
Reception and transmission at 9.600/8/N/1

OFF

ON

OFF

ON

1-2

1-3

FALLBACK MODE
INA OR INB at 19.200/8/N/1

All outputs connected to INA or INB if no signal applied to INA.
Reception and transmission at 19.200/8/N/1

OFF

ON

ON

ON

1-2

1-3

FALLBACK MODE
INA OR INB 38.400/8/N/1

All outputs connected to INA or INB if no signal applied to INA.
Reception and transmission at 38.400/8/N/1

X

X

ON

ON

X

X

NOT APPLICABLE


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