The DIN8 connector and connections are
show below
DIN 8 - Power, Relay, and A/D
Connector
| 1 |
A/D Input for Elevation |
| 2 |
CW relay out |
| 3 |
UP relay out |
| 4 |
CCW relay out |
| 5 |
DOWN relay out |
| 6 |
A/D Input for Azimuth |
| 7 |
+12 VDC Input to power board |
| 8 |
Ground |
Note: The Up, Down, CW, and CCW outputs are open collector, transistor
driven outputs. They can sink a maximum of 800 milliamps, 100 volts.
We also sell a relay board kit to facilitate controlling your positioning
motors. The relay kit is part number RLY-1.
See the Products page for more information.
Wiring up the A/D Decoders
The A/D decoders are
contained within the 16F877 processor chip and can accept
a maximum input of +5 volts. So you must wire your
potentiometers as shown below to ensure proper operation.
NOTE: Do NOT apply more than +5 volts to the A/D inputs
(pin 1 and pin 6) or you will damage the processor. Note
that when using with a G-5500 rotator (see below), the
rotator supplies the correct voltage.
 Special
Note for wiring A/D inputs: We have discovered that the ground pin
(8) of the DIN plug does not supply a resistance-free ground connection.
This will not be problem unless you are using the A/D inputs on the
connector. The problem can be solved by connecting the ground
wire(s) in your cable to pin 8 AND to the shell of the connector.
This prevents a lot of display "jitter" when displaying A/D derived
values.
Note the grounding in the partially assembled connector shown to the
left. |
Use with Yaesu G-5500
| The DIN8 connector is configured to
match the connections to a Yaesu G-5500 rotator control
box's External Control jack. If you wire up two DIN8
plugs to match the pinout shown above, you can plug one
end to the CT-1 controller and the other end to the
G-5500 control box and you are ready to go. In this case
the G-5500 supplies +12 volts to the controller board. |
Note that the pins are NOT numbered sequentially
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