SECTION SIX: Interfacing the 957 system
957 INSTALLATION MANUAL, Revision C1
Page 47
relay), a spike suppression diode such as a 1N4001 should be
connected across the load. Cathode connects to the power side
of the device and anode connects to the output pin side. The
output is normally open, switching to ground for 80ms. It
supports speeds from zero to 100 knots (clamps at 100kt).
Figure 16: Wiring for 200 PPNM output
Configuring the
RS-232 port
The RS-232 port on the NMEA connector is used to interface to
any of the following equipment:
•
any compatible SC104 output
•
a PC for downloading your waypoints, or for uploading
957 software updates
The following sections describe the RS-232 port’s settings for
SC-104 in, and copy port 1 and 2.
Using SC-104 in
THE SC-104 IN
setting lets the 957 accept optional differential
corrections from any source that transmits the standard SC-104
data stream. When using
SC-104 IN
, be sure that the
BAUD
RATE
setting also matches the beacon receiver’s baud rate
requirements.
Using copy port 1 and copy
port 2
The
COPY PORT
setting lets you interface the 957 to many PC’s
without using an RS422-to-RS232 converter. Many PC
application programs can be used for waypoint/route loading,
chart programs, data logging, etc. This function “copies” the
output of the specified port 1 or port 2 data format (NMEA
Summary of Contents for 957
Page 28: ...SECTION THREE Installing and wiring the 2201 Page 24 957 Installation Manual Revision C1 ...
Page 34: ...SECTION FOUR Installing and wiring the 2701 Page 30 957 Installation Manual Revision C1 ...
Page 42: ...SECTION FIVE Checking out the system Page 38 957 INSTALLATION MANUAL Revision C1 ...
Page 70: ...APPENDIX A 957 system technical specifications Page 66 957 INSTALLATION MANUAL Revision C1 ...