NCC-22 NMEA CRC Checksum Calculator
NMEA Checksum Calculator calculates the checksum of NMEA sentences not including checksums and sends them to the output.
Especially in some older bridge navigation devices, NMEA data is sent without checksum calculation. In addition, data from machinery and alarm systems are usually sent to VDR, SVDR devices without checksum. Newer devices do not accept data without checksums.
The Calculator receives data at supported speeds from the isolated NMEA input. It checks automatically whether there is a checksum in the incoming data. If a data without checksum is received, the checksum of that data is calculated and sent to the output. If a data with checksum is received, it is not processed and that data is directed to the output. Input and output can be adjusted independently according to the specified speeds.
The NCC-22 can be powered within the range of 9~32 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.
Technical specifications
| Supply Voltage | 9-32VDC |
|---|---|
| Power Supply Protection | Internal resettable fuse Reversed polarity protection |
| Input Port | 1 X 5000V Galvanic isolated NMEA0183, IEC61162 |
| Output Port | 1 X RS422, RS485 (2 output optionally) |
| Input Speed | Configurable with DIP Switches 4800, 9600, 38400, 115200 bps |
| Output Speed | Configurable with DIP Switches 4800, 9600, 38400, 115200 bps |
| Indicators | Power LED Input Data LED Output Data LED System LED |
| Case – Dimensions | ABS DIN Rail Mount Box Width: 105 mm Depth: 86 mm Height: 58 mm |
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