KD7LMO - Payload Computer


Payloads Payload Comp Overview Block Diagram Processor GPS TNC Local I/O Repeater Diplexer Commands Source Code Mechanical Telemetry Data Logger Micro Beacon Cut Down HF-APRS Video Link Pico Beacon NSRV Beacon APRS Beacon

Local I/O

In normal operation, the payload computer communicates with other packages through an RF wireless network. In the event a network is not in place or hardwire control is desired, the payload computer provides limited I/O (Input/Output) capability. The I/O functions are wired to a female DB-9 connector located on the bottom of the payload computer package. The connector provides the following functions.

Two - 50 volt, 250mA current sink drivers. (Open drain MOSFETs).

RS-232 level serial data.

External temperature sensor.

External VHF/UHF antenna.

External power connector for testing.

External Connectors.

*Pin*	*Function*
2	Transmit Data
3	Receive Data
5	Ground
6	Output-1
9	Output-2

DB-9 pin out.

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