The NMEA Serial Multiplexer combines up to four NMEA 0183 listener channels into a single RS-232 output for connection to a computer.

The multiplexer reads and stores incoming data from each instrument. Whenever a complete message is received, the multiplexer automatically dumps it to the RS-232C output even while it is still reading the inputs. Therefore, complete messages are dumped as soon as they are received without any loss of input data. A "talker" port is included to allow the computer to request specific messages from instruments with multiple message types such as GPS receivers.

Installation of the multiplexer is simple. It can be mounted to any convenient surface with all connections made via a terminal strip. The unit is fully automatic and acquires data without user interaction. If more than four inputs are needed, multiple modules may be ganged together.

Features

• 4 NMEA 0183 listener ports
• 1 NMEA 0183 talker port
•  1 full duplex RS-232 port
• RS-232 baud at 4800/9600
• PC compatible data

£249.99 inc. VAT (£212.76 ex. VAT)

Specification

Supply Voltage	8-20v DC
Supply Current (@12v DC)	100ma.
Input drive Voltage (min/max)	4/15v (active state)
Input impedance	500 ohms min.
Talker output level	Differential per RS-422
Serial output data rate	4800, 9600 baud (selectable)
Serial output format	RS-232C or NMEA 0183
Size	4.5x3.25x.875 inches
Weight	8 oz.
Warranty	2 year replacement