Raymarine NMEA Multiplexer - Manual

1 Introduction The Raymarine NMEA Multiplexer combines data from up to four NMEA-0183 devices to provide a single, multiplexed NMEA output. Inputs & outputs The NMEA Multiplexer has:• Four NMEA inputs (listener-ports), NMEA In 1, 2, 3 & 4 . • One NMEA output (talker-port), NMEA Out • One com...

2 NMEA inputs Each NMEA in (listener) port is a differential pair across terminals a and b , and can receive NMEA data from one device. The speed of each listener port is fixed at 4800 baud. NMEA data on listener ports 1 and 2 is multiplexed in real time (i.e. unbuffered). NMEA data on listener port...

3 Installation Mounting As the NMEA Multiplexer is not waterproof, it must be fitted in a location where it will not come into contact with water. Secure the NMEA Multiplexer to a suitable surface, as shown in the following illustration. D7556-1 Data Overflow NMEA-0183 Multiplex er DataOverflow NMEA...

4 Connections Real-time or buffered inputs Before connecting NMEA inputs to your NMEA Multiplexer, consider whether they should be connected as real time or buffered inputs:• Data running at a fast rate and consisting of single sentences, particularly time-critical data, should be connected to eithe...

5 NMEA out Connect the a and b terminals of the NMEA Out connector to the listening ports of up to four devices to which you wish to transmit multiplexed data. The manner in which the connections NMEA out - NMEA Multiplexer NMEA out + Device with single-ended NMEA output Ground NMEA Multiplexer Note...

6 are made depends on whether the device has a differential or single ended output, as follows: Power supply The NMEA Multiplexer operates from a dc supply voltage in the range 8 V to 30 V and provides protection against reversed polarity. It is recommended to connect the NMEA Multiplexer to the sam...

7 • 24 AWG single-strand wire.• 7/0.2 multi-strand wire, i.e. 7 strands, each of 0.2 mm diame- ter CAUTION: Electrical Safety Before connecting power to the NMEA Multiplexer, turn off the power supply. Connect either a 24 V or 12 V power supply, via a 0.5 A fuse, as follows: Securing cables When you...

8 partially received sentences will be discarded, to ensure that the NMEA Multiplexer only passes complete and valid sentences. You may be able to resolve this overflow situation if you:• Set up the devices on the listener ports to send less data or data at greater intervals. If possible, disable no...

9 Specifications Supply voltage: 8 V to 30 V dc, protected against reversed polarity. Supply protection: 0.5 A fuse Supply connection: Minimum requirement either:24 AWG single-strand wire.or7/0.2 multi-strand wire. Current consumption: 70 mA maximum, with fully loaded talker ports. Inputs: 4 x NMEA-...