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NMEA Data Combiner - NDC-3-B
Page 9© 2005 Active Research Limited
Other Connections
Figure 3 – RS-232 and Battery connections
Connecting to a Personal Computer
The RS-232 port can be connected to a PC communications
port using a cable conforming to the following
specification:
1. A D-type female (socket) connector for the PC end of
the cable
2. A minimum of 3 cores are required in a shielded
cable. Higher quality cable will naturally yield higher
performance / higher Signal-to-Noise Ratio (SNR).
Most typical cables have two twisted pairs inside. In
this case, use one pair for the TX line and one for the
RX line. Use the spare wire in each pair as ground,
and connect the cable shield to ground only at the
computer end.
3. The TX of the NDC-3 should be connected to the
RX of the computer (standard D-type, pin 2) and
the NDC-3 RX should be connected to the TX of the
computer (pin 3). The GND of the NDC-3 should be
connected to the PC’s serial port ground (pin 5).
Connecting to the battery supply
The Actisense™ NDC-3 should be wired to the vessel’s
battery supply in the most direct manner possible, to
minimize interference from other electronic devices. The
cable used should be of sufficient gauge to handle the
power requirements of the Actisense™ NDC-3 (refer to
the Specifications sections).
Note:
1. Wire colours are for guidance only.
NMEA DATA COMBINER
99999
NDC-3-B