- NDC Communications Network Adapter User Manual NDC-3

NMEA Data Combiner - NDC-3-B

1. Four NMEA 0183 inputs.

All NMEA 0183 inputs are of the differential opto-

isolated type and use the unique Actisense™ low

current drain circuitry (2mA @ 2.0v) to conform in full

with the NMEA 0183 marine electronic device network

communication standard, and are ﬂexible enough

to interface to most fully and partially compliant

devices.

2. An NMEA (data combined) 0183 output.

The NMEA 0183 output comprises of three

connections: ‘+’, ‘-‘ and ‘Ground’ and conforms in full

to the NMEA 0183 standard. This allows the NDC to

interface to various different devices that require any

combination of these outputs.

3. An RS-232 input/output.

The bi-directional RS-232 port is designed for direct

connection to a Personal Computer (PC) or other

marine device capable of interfacing to a standard

RS-232 port.

4. Battery supply input.

Note:

1. To complete the NMEA 0183 standard all device

interconnection NMEA cables used should meet the

two-conductor, shielded, twisted pair conﬁguration

speciﬁcation. The shield connection of these wires

should be connected at the instrument end only to

prevent ground loops.

2. Refer to the Speciﬁcations section for the full details

on input/output speciﬁcations.

3. If the laptop / PC to be used with the NDC does not

have an RS-232 serial port available, the Actisense™

USB to RS-232 adapter cable has been tried and

tested to provide a compatible communications port.

Please visit the Actisense™ website for full details

on this, and other Actisense™ products.

The NMEA Data Combiner (NDC-3) has screw-terminal “Phoenix” type external connections for: -

Connections

Figure 1 – All external connections

NMEA DATA COMBINER

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NDC-3-B