Payload Wiring Connections - FLIR PTU-D300 User Manual

INSTALLATION & INITIAL SETUP
Payloads should be mounted as close to the Pan-tilt housing as possible so as to position the
center of gravity as close to the pan-axis as possible.
In all cases, care must be taken to ensure that the payload will clear the Pan-tilt
housing and surrounding objects throughout the full range of motion of the unit.
Though the PTU-D300 unit is rated to a maximum load of 70 lbs, the distribution of the load
affects the actual load capable of being moved by the pan-tilt unit. The steps to determine whether
your load and its positioning (e.g., center of gravity) are within the maximum load capacity and
dynamics are:
• Mount your payload. Side-mount is preferred for heavier loads, as it keeps the payload
center of gravity closer to the tilt axis of rotation thereby minimizing torque requirements.
Ensure that the load is securely attached to the payload bracket.
• First move the pan axis through its range to test whether the pan-tilt can handle the load
(e.g., enter "dr pp2700 a pp-2700 a pp0 "). A load that is too heavy or moved too
quickly will cause the unit to lose synchrony, and this will be accompanied by an audible
"rrrr" sound from the pan-tilt unit motors. See section 5.2 on page 27 for further information
on configuration of the Pan-Tilt for heavier payloads.
• If your load passed the pan axis load test, you can then test the tilt axis load handling
capability. The center of gravity for top mounted payloads is further from the tilt axis of
rotation, and this may require more torque to move the load. Move the tilt axis through its
range of motion to test whether the pan-tilt can handle the load (e.g., enter "DR TP-900 A
TP600 A TPp0 "). A load that is too heavy or moved too quickly will cause the unit to
lose synchrony, and this will be accompanied by an audible "rrrr" sound from the pan-tilt
unit motors.
• If your load fails the above pan or tilt axis load handling tests, check Section 5.2 for further
information. Significantly faster or lower power control can be obtained via commands to
the pan-tilt unit. The speed and acceleration of a mechanical system depends upon the
inertial properties of your load. The ability of the pan-tilt unit to successfully move your
load without losing synchrony depends upon the inertial load factors and their relationship
to power supply voltage, unit speed, acceleration, position, motor torque, etc. Section 5.2
discusses how to configure pan-tilt parameters to achieve more optimal pan-tilt unit
performance for your load. If you have questions about your payload mounting or load
handling, please contact Technical Support for further assistance.
• If your load passes the above pan and tilt axis load handling tests, you are ready to begin
controlling your load using the commands described in Section 4.

3.8 Payload Wiring Connections

The D300 provides payload pass-thru signals that connect between pins in the base
connector to corresponding pins in the payload connector. Additional pins in the payload
connector provide other payload controls (auxiliary RS232 ports and TTL control). Figure 2
shows this payload connector which is also a MIL-C-26482 compatible receptacle (19 pins).
Appendix A.4 details the payload connector pin-out. Your payload connects to the payload
connector via a male MIL-C-26482 compatible plug (e.g., PT06A14-19P).
Appendix A.4 shows the payload connector wiring. Pins highlighted in red indicate payload
pass-thru signals connected to corresponding pins in the base connector.
When attaching payload signals to the system, care must be taken to adhere to all
specifications for the pass-thru signals, such as maximum voltage and current
levels.
page 10
PTU-D300 User's Manual (v2.19)