HC‑402 4 in 1 NMEA Digital Signal SynthesizerInput Input 4 Channel NMEA0183 Output 2 Channel NMEA0183 Item Type: NMEA Digital Signal SynthesizerMaterial: ABSFunction Overview:NMEA digital signal synthesizer (Model: HC-402) provides 4 serial port data input (NMEA0183 Protocol) and synthesizes into 2 serial port output (NMEA0183 Protocol), each serial port input baud rate can be automatically selected: 2400-115200 , the composite output signal baud rate defaults to 38400 (The output baud rate can be set to 115200). This product is suitable for: devices with only 1 input series, such as: LOWRANCE, RAYMARINE, GARMIN, SIMRAD radar, etc.e.g.: 1) Input Statement Format: The first serial port statement is a post statement $HEHDM, 282.0, T*3E The second serial port statement is a GPS statement. $ GPRMC, 090951, A, 2304.5504, N, 11325.8370, E, 000.0, 000.0, 120917, 002.6, W * 61 The third serial port statement is the AIS statement ! AIVDM, 1, 1, 0, A, 16:FDnPP0087<LP = = n>U?gwl2588, 0*29 The fourth serial port statement is a log statement $HCVBW, 20.3, 1.5, A, 23.1, 1.2, A, 1.1, A, 1.5, A * 4A 2) Output Statement Format: The output signal is output simultaneously in two ways, and the output statement is the sum of all sentences after synthesis, and the signal format conforms to the RS-422 standard and has a baud rate of 38400. $HEHDM, 282.0, T*3E $ GPRMC, 090951, A, 2304.5504, N, 11325.8370, E, 000.0, 000.0, 120917, 002.6, W * 61 ! AIVDM, 1, 1, 0, A, 16:FDnPP0087<LP = = n>U?gwl2588,0*29 $HCVBW, 20.3, 1.5, A, 23.1, 1.2, A, 1.1, A, 1.5, A * 4A Interface Definition and Cable Definition 1) NMEA1-NMEA4 input is the same: A1-first way NMEA1 input A B1-NMEA1 input B First way A2-second way NMEA2 input A B2-second way NMEA2 input B A3-third way NMEA3 input A B3 - third line NMEA3 input B A4-fourth way NMEA4 input A B4-NMEA4 fourth line B input 2) OUT1 and OUT2 outputs are the same: A-nmea output A B-nmea output B 3) 24+-positive power supply 4) 24-negative power supply