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Appendix B: Connectors
Power In Jack:
The POWER IN jack is used to supply 12VDC to the
camera. The jack is locking and
center-positive
. The mating plug is
the locking model
Switchcraft
S760K
with 0.218 inch outer
diameter and 0.080 inch inner
diameter (5.5/2.0 mm).
Guide Port
:
The AllSky camera is
used in a stationary position and
therefore the guide port of the internal
SG-4 is not generally used for AllSky
monitoring. The information is
provided here for reference only.
The
Guide Port is where you connect the
SG-4 to a telescope using a 6
conductor phone type cable. Viewed from
outside the back plate of SG-4, looking in, it
has the pin-out configuration shown in the
diagram at right. Pin 6 is not connected. The
+X, +Y, -X and –Y
signals are driven from
mechanically isolated relays so there is no
need for additional opto-isolated relays or
relay box for use with any telescope
.
Note: In order for the East/West
toggle switch to function properly with GEM mounts, the SG-4
assumes that +X and –X moves correspond to RA.
RS-232 Port:
The RS-232 port is
used to connect the SG-4 to a
serial port on your computer.
Note: Pin 9 su12VDC out
when the SG-4 is receiving power
through the POWER IN jack. This
allows a Blue Tooth wireless
transmitter to be connected
directly to this port and it will
receive power from the SG-4. A
serial to USB adapter may also be
connected here if your computer
does not have an RS-232 (serial)
port. Adding accessories powered
by this port will increase the power requirements for the camera by the
amount used for the accessory. Our standard power supply is more
than adequate for most applications.
