Powering The Device - Lacerta M-GEN User Manual

conducting material or liquid fall into the circuit, on the CCD and its pins.
(The foam around the CCD gives some protection.)
• Supplied cables:
o 1 piece of Camera cable (black), similar to a straight UTP cable. Used to
connect the Camera with the Handcontroller. It's length is around 1.8-2m.
o 1 piece of "ST-4 autoguider" cable (white) to connect the Handcontroller
and the mount with ST-4 compatible autoguider input. About 1.5 meters of
length.
o 1 piece of USB-A (PC side) / USB-B mini5 (HC side) cable to the
connection with the PC. Used to update Firmwares, download data files or
control the HC.
o (Some release include an EOS shutter cable with 2.5mm and 3.5mm stereo
jack ending, 2m length. (Can be used directly for Canon EOS 350D))

1.2 Powering the device

In normal use : (during autoguiding)
The device needs a nominal 12V DC power source on the HC's DC input connecor, which
is tip positive. This is essential for the Camera for imaging. 9-15V is also accepted but don't
use higher voltage than 15V (peak voltage max. 18V)! The output power of the DC supply
must be minimum 2.4W (12V, max. 200mA/125mA), typically 1.6W is enough.
Be careful choosing the type of the DC power source, it
constant source. A battery, stabilized DC or switching regulator should be used! An
unfiltered, only AC-rectified power (which has a heavy transformer in it) may not supply the
device properly, this could lead to sudden reset/turn-off of the device or even
input circuitry! (For example a 220V-input and 12V / 800mA-output rectified power supply
could easily source over 20V peak voltage at low load, which is harmful for the device!)
" Logic only" mode : (USB connection: Firmware update etc.)
If the Camera is not connected or will not be used for imaing the USB bus can alo supply
the device's logic circuit. All those functions are accessible that don't need analog power
(imaging). Works for example: Autoexposure program, data file downloading, Firmware
updating but autoguiding (star search, LiveView etc.) will not.
NOTE: new type devices (boot version ≥ $14) may fail to update the Camera's firmware
if the USB voltage is well lower than 5V. In this case, power the device also from its DC
input!
When the device gets power input (DC input or USB cable is plugged in) a short flash of
the four LEDs indicates this. The flash is also present at the Firmware update process when
the device is reset before the next update step.
MUST BE
5
well stabilized or a
damage the