NM-251A    Dual-in NMEA buffer splitter 5-output  (User Guide)
 
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DIP switch Settings


Dip-switch & Jumper Configuration

Output routing


SW

1

SW

2

SW

3

SW

4

J5

J6

Out

1/2

Out

3/4

RS

232

Out

5

OFF

x

OFF

OFF

1-2

1-2

Priority encoding mode

When NMEA data are available in the first input (InA) the buffer is sending the data to output 1,2,3,4 If is not receiving data in (InA) automatically switch to (inB) and sending data to outputs

Converting to RS422 the data received in the Rx channel of the RS232

Priority encoding mode.

Ina or Inb is transmitted to Out 1-4 and RS232.

Out5 is converting RxD channel from RS232.
Baud rate at 4.800 bps

OFF

x

OFF

OFF

1-3

1-2

Priority encoding mode

When NMEA data are available in the first input (InA) the buffer is sending the data to output 1,2,3,4 If is not receiving data in (InA) automatically switch to (inB) and sending data to outputs

Converting to RS422 the data received in the Rx channel of the RS232

Priority encoding mode.

Ina or Inb is transmitted to Out 1-4 and RS232. Out5 is converting RXD channel from RS232.
Baud rate is free up to 19.200 bps

CPU does not process the input signals

OFF

x

OFF

OFF

1-2

1-3

Priority encoding mode

When NMEA data are available in the first input (InA) the buffer is sending the data to output 1,2,3,4,5 If is not receiving data in (InA) automatically switch to (inB) and sending data to outputs

Priority encoding mode.

Ina or Inb is transmitted to Out 1-5 and RS232.

Baud rate at 4.800 bps (default).

OFF

x

OFF

OFF

1-3

1-3

Priority encoding mode

When NMEA data are available in the first input (InA) the buffer is sending the data to output 1,2,3,4,5 If is not receiving data in (InA) automatically switch to (inB) and sending data to outputs

Priority encoding mode.

Ina or Inb is transmitted to Out 1-5 and RS232.

Baud rate is free up to 19.200 bps.

CPU does not process the input signals.

ON

OFF

OFF

OFF

1-2

1-2

Data from Ina
to outputs1,2

Data from Inb
to outputs 3,4

Data from Ina
to RS-232 Tx channel

Converting to RS422 the data received in the Rx channel of the RS232

Split mode

Selects transmission from Ina to Out1/2 and RS232 and from Inb to Out 3/4. Out5 is converting RXD channel from RS232.

Baud rate at 4.800 bps.

ON

OFF

OFF

OFF

1-2

1-3

Data from Ina
to outputs1,2

Data from Inb
to outputs 3,4

Data from Ina
to RS-232 Tx channel

Data from Ina
to outputs 5

Split mode
Selects transmission from Ina to Out1/2, RS232 and Out5 and from Inb to Out 3/4.

Baud rate at 4.800 bps.

ON

ON

OFF

OFF

1-2

1-2

Data from Ina
to outputs1,2

Data from Inb
to outputs 3,4

Data from Inb
to RS-232 Tx channel

Converting to RS422 the data received in the Rx channel of the RS232

Split mode
Selects transmission from Ina to Out1/2 and from Inb to Out3/4 and the RS232. Out5 is converting RXD channel from RS232.

Baud rate at 4.800 bps.

ON

ON

OFF

OFF

1-2

1-3

Data from Ina
to outputs1,2

Data from Inb
to outputs 3,4

Data from Inb
to RS-232 Tx channel

Data from Inb
to outputs 5

Split mode
Selects transmission from Ina to Out1/2, and from Inb to Out3/4 and Out5 and RS232.

Baud rate at 4.800 bps.

ON

ON

OFF

OFF

1-3

1-2

Not Applicable

ON

OFF

OFF

OFF

1-3

1-2

Not Applicable

ON

OFF

OFF

OFF

1-3

1-3

Not Applicable

ON

ON

OFF

OFF

1-3

1-3

Not Applicable



Table 1: NM-251A Configuration

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