Point Grey Grasshopper - Cables; Host Adapter Card; Camera Power

Point Grey Research Grasshopper Technical Reference
Camera Interface
Revised 26-Nov-10
Copyright (c) 2010 Point Grey Research Inc.
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Table 1: IEEE-1394b connector pin configuration
3.2. Cables
The maximum 1394 cable length between any 1394 node (e.g. camera to PCI card, PCI card to
hub, etc.) is 4.5m, as specified by the IEEE-1394 standard. Standard, shielded twisted pai
r
copper cables must be used. Consult the following knowledge base article for information on how
to extend the physical distance between the camera and the controlling host system:
KB Article 197: www.ptgrey.com/support/kb/index.asp?a=4&q=197
3.3. Host Adapter Card
All camera KITs (e.g. part numbers ending with “KIT”) come with a 3-port IEEE-1394 PCI hos
t
adapter card. For more information regarding the differences between various 1394 hos
t
adapters, consult the following knowledge base article:
KB Article 146: www.ptgrey.com/support/kb/index.asp?a=4&q=146
3.4. Camera Power
The 9-pin 1394b interface connects to a standard IEEE-1394 (FireWire) 9-pin cable and provides
a power connection between the camera and the host computer. The ideal input voltage is 12
V
DC; however, the camera is designed to handle voltages between 8V and 30V DC. The powe
r
consumption is outlined in the Camera Specifications section.
Some systems - such as laptop computers or those with several FireWire devices connected -
require an external power supply to power the camera. For suggestions on how to provide powe
r
in these circumstances, consult the following knowledge base article:
KB Article 93: www.ptgrey.com/support/kb/index.asp?a=4&q=93
Some PGR cameras allow the user to power-up or power-down components of the camera using
the DCAM CAMERA_POWER register 0x610. The exact components, e.g. image sensor, A/D
converter, other board electronics, will vary between camera models. Consult the PGR IEEE-
1394 Digital Camera Register Reference for more information.
When a camera is power cycled (power disengaged then re-engaged), the camera will revert to
its default factory settings, or if applicable, the last saved memory channel.