ALLIED Vision Technologies Oscar F-810 - Manual (Page 19)

Safety instructions
FireWire Hardware Installation Guide V8.0.0
19
FireWire safety instructions
FireWire hot-plug and screw-lock precautions
Caution

Hot-plug precautions
• Although FireWire devices can theoretically be hot-
plugged without powering down equipment, we strongly
recommend turning the computer power off, before
connecting a digital camera to it via a FireWire cable.
• Static electricity or slight plug misalignment during
insertion may short-circuit and damage components.
• The physical ports may be damaged by excessive ESD
(electrostatic discharge), when connected under powered
conditions. It is good practice to ensure proper grounding
of computer case and camera case to the same ground
potential, before plugging the camera cable into the port
of the computer. This ensures that no excessive difference
of electrical potential exists between computer and cam-
era.
• It is very important not to exceed an inrush current of
18 mJoule in 3 ms. (This means that a device, when pow-
ered via 12 V bus power must never draw more than 1.5 A,
even not in the first 3 ms.)
• Higher inrush current may damage the physical inter-
face chip of the camera and/or the phy chip in your PC.
• Whereas inrush current is not a problem for one Pike/
Stingray camera, daisy chaining multiple cameras or sup-
plying bus power via (optional) HIROSE power out to cir-
cuitry with unknown inrush currents needs careful design
considerations to be on the safe side.
Latching / screw-lock precautions
• 1394a cameras: We strongly recommend using only
1394a cables with latch connectors, to insure a tight
electrical connection that is resistant to vibration and
gravity.
• 1394b cameras: All AVT 1394b camera and cables have
industrial screw-lock fasteners, to insure a tight electri-
cal connection that is resistant to vibration and gravity.
• We strongly recommend using only 1394b adapter
cards with screw-locks.