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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

Order - Quotation Request
Picture
Price ... 240.00 EURO
Output ports

Each of the five general purpose talker ports transmit NMEA sentences in both RS422 and TTL signal levels, depending on the connection topology chosen (see figure 1, 2 and 3), and can fan out one instrument. Current drawn from each port is efficient enough to drive any NMEA compatible instrument.

The RS-232 port can deliver NMEA sentences to any modern computer running the appropriate software on Windows 98 and above provided that serial communication follows the 4.800, 9.600, 19.200 or 38.400/8/N/1 standard. This port is not optically isolated and should be used for testing purposes only to avoid current leakage. It can be used though to interface a computer system if proper isolation is achieved or if the computer is supplied from an isolated power supply.

Connections

The NM-251A-MUX can be connected as shown in figures 1,2 and 3 using all RS-422 outputs (figure 1), all TTL outputs (figure 2) or using either the RS-422 or TTL output of each port taking care not to connect the same port for both signal level outputting. 
Picture
Figure 1
Picture
Figure 2
Picture
Figure 3
Power supply

The NM-251A-MUX can be powered within the range of 10-35 VDC. The nominal voltage of 24 Vdc is advised for powering the device in normal operation. Power input port has a protection for incorrect polarity connection of the supplying voltage. 

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