11
3.3 Pinout of the Interfaces:
PART III: ELECTRONIC CONTROL INTERFACE
Note:
• The SNAP port provides two trigger sig-
nals to the stereo plug. Some cameras
need both “Shutter“ and “Focus“ signals.
• The camera control cable shipped with the
CQ350-PRO mount is for a Canon EOS
series DSLR camera. Cable for other
cameras is optional and can be ordered
separately.
• Output Voltage: DC 11V (minimum) to DC 16V (maximum), higher voltage is preferred. Voltage
not in this range might cause permanent damage to the motor controller or the hand controller.
• Output Power: 55W (minimum).
• Do not use an un-regulated AC-to-DC adapter. A Skywatcher AC-to-DC switching power sup-
ply(13.7V/4A) for GOTO mount is highly recommended.
• If the power voltage is too low, the motor controller will stop the motors automatically.
3.4 Power Supply Requirements
3.5 Cable Management System
Fig. 3.3
IN
USB,
Aux. I/O,
Aux. Power
OUT
Aux. I/O
OUT
Aux. Power,
USB
• IN - Auxiliary Power
:
• 2.0mm I.D, 5.5mm O.D., central positive.
• DC 6V to DC 24V, 5A.
• It also powers the USB hub.
• IN - USB
:
• USB 3.0 Type B receptacle.
• Recommend less than 1 meter cable length for
USB 3.0 connection. Down-grade to a USB 2.0 ca-
ble if longer USB connection is needed.
• Can drive the USB hub for less than 0.4A payload.
• Auxiliary I/O
:
• Straight connections for the paired RJ10, RJ12
and RJ45 modular jacks.
• 0.5 A maximum current each pin.
• OUT - Auxiliary Power
:
• 2.0mm I.D, 5.5mm O.D., central positive.
• 4A/Outlet, 4A in total.
• OUT - USB
:
• 4-Port USB 3.0 hub. Type A receptacle.
• 0.9A/Port if powered by an auxiliary power supply.
• 0.4A total output if powered by host USB port.
Fig. 3.5.1
Fig. 3.5.2
SNAP
:This is a stereo outlet for connecting to a camera’s remote control port.
2
3
4
1
5
6
7
8
HAND CONTROL
GND
Vpp+
RX(3.3V)
TX(3.3V)
2
3
4
1
5
6
AUTO GUIDE
GND
RA+
RA-
DEC+
DEC-
SNAP
Optoisolator
GND
Vpp+
POWER
Control Signal
Internal Circuit
GND
TRIGGER
