FLIR PTU-5, Руководство пользователя, Страница: 21 / 54

Copyright 2017, FLIR Commercial Systems, Inc.
Chapter 4: Installation & Setup
17
4.3 - Power Sources
The PTU requires an unregulated 12-30VDC power source capable of 17 continuous peak watts. Since
the PTU has a DC to DC converter, you may not see reduced performance if you use a lower-voltage
power supply.
4.4 - Fusing
If you are using a DC power source that is capable of supplying current beyond the PTU rated
maximums, you must add an appropriate fuse in series with the DC power source. For example, you
must fuse a connection made to a vehicle battery or lighter plug.
4.5 - Shielding
Shielding protects the PTU from external Electromagnetic Interference (EMI) and prevents radiation
emission from internal and external cabling. Proper shielding must be used to meet the regulatory
requirements described in
“Regulatory & Warranty Information” on page E-1 . All PTU wiring
configurations provide a shield pin at both the base and the payload, as described in “Electrical
Specifications” on page A-1 . This shield is also attached to the PTU housing. The shield pin is not
connected to ground internally. The shield potential will vary from ground and must not be confused
with a ground pin.
Ideally, either the PTU chassis or the shield pin at the base connector should be routed to a long
grounding rod that is embedded in the ground. If needed, it is also acceptable to route the shield pin to
the power ground through a surge protection device.
CAUTION: THE PTU CONTAINS REVERSE POLARITY, OVER-VOLTAGE AND
OVERCURRENT PROTECTION; HOWEVER, SUSTAINED OVERLOAD CAN
DAMAGE THE UNIT.
WARNING: FAILURE TO PROPERLY FUSE THE PTU POWER SOURCE COULD OVERLOAD
INTERNAL PROTECTION DEVICES AND CAUSE DEATH, PERSONAL INJURY, AND/OR
DAMAGE TO THE UNIT.
CAUTION: THE PTU WILL NOT BE PROPERLY SHIELDED UNTIL THE SHIELD PIN IS
PROPERLY CONNECTED.