Section 8 - Input/Output Configurations; Sensor Signals - NorthStar 8700 Technical Reference Manual

Section 8 - Input/output configurations

8.1 I/O ports

8.2 Sensor signals

05/01/97 REV H
The Northstar 8700, 8800 series, and 8900 series sensors contain either a
GPS sensor, a BDM receiver, or both. Each sensor has two full-duplex
serial ports that you can interconnect with each other and/or external
devices in various ways as required for your applications. Both RS-422
and RS-232 inputs and outputs are provided, and have separate pins on
the I/O connector. RS-422 and RS-232 outputs may be used simulta-
neously; however, only one receiver input for a particular port should
be connected.
To allow for various installation requirements, the sensor contains a pro-
grammable matrix switch that can connect any GPS or BDM receiver sig-
nal to any sensor's I/O port. Five program configurations are available
with the standard product; one of these is selected by grounding appro-
priate pins on the sensor's 25-pin data/power connector. The wiring dia-
gram for each sensor model shows the required configuration of these
pins. For other specialized applications requiring different configurations,
contact Northstar to determine the cost and feasibility of customized pro-
gramming.
The signal levels of the available I/O ports are shown below.
Pin # I/O port
7 RS-232 receiver 1 input
21 RS-232 receiver 2 input
10 RS-232 receiver 3 input
15, 3 RS-422 receiver 1 input (A/B)
1, 14 RS-422 receiver 2 input (A/B)
6 RS-232 transmitter 1 output
20 RS-232 transmitter 2 output
9 RS-232 transmitter 3 output
5, 18 RS-422 transmitter 1 output (A/B)
16, 4 RS-422 transmitter 2 output (A/B)
The available sensor signals are listed below.
GPS primary output
•
GPS auxiliary output
•
BDM SC-104 output
•
Section 8 - Input/output configurations
Table 6: I/O ports
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