MOTU Traveler-mk3 User Manual page 23

POWER OPTIONS
The Traveler-mk3 can draw power from three
possible sources:
1. the computer (via FireWire)
2. an external battery pack
3. a DC power supply
Figure 3-10: The Traveler-mk3's battery and power supply options.
Bus power requirements
The Traveler-mk3 draws all the power it needs
from the FireWire bus connection to the computer.
However, the FireWire connection to the computer
must meet all of the requirements discussed below.
6-pin FireWire connectors
The Traveler-mk3 can only draw power over the
FireWire bus from a 6-pin to 6-pin cable, or a 6-pin
to 9-pin (FireWire B) cable. It cannot draw power
from a FireWire cable with a 4-pin connector, as
shown below:
✓
YES
6-pin FireWire
Figure 3-11: 4-pin FireWire connectors cannot be used for bus power.
I N S T A L L I N G T H E T R A V E L E R - M K 3 H A R D W A R E
When operating under bus power, daisy-chaining
is not recommended
The Traveler-mk3 can be daisy-chained with other
FireWire devices from a single FireWire
connection to the computer. However, if the
Traveler-mk3 is operating under bus power, this is
not recommended. If you need to daisy chain the
Traveler-mk3 with other devices on the same
FireWire bus, power the Traveler-mk3 with a DC
power supply (or battery), and turn off the Bus
Power switch on the side panel. The other devices
on the chain should also have their own power
supply. In general, bus-powered FireWire devices
should not be daisy-chained.
FireWire adapter products must be powered
If you are using a FireWire adapter (a third-party
product that supplies one or more FireWire ports
to your computer), it must have direct access to a
power supply:
■
Traveler-mk3 to a PCI card and run the
Traveler-mk3 under bus power, the PCI card must
have a direct connection to the power supply
harness inside your computer. This is the same
power supply harness to which you connect
internal hard drives, CD/DVD drives, etc.
■
— If you plan to connect the Traveler-mk3 to a PC
card, Cardbus or ExpressCard FireWire adapter
✗
(inserted in the card slot in your laptop), it must
provide a 6-pin connection and it must also have
NO
its own power supply. Most commonly, these types
of products have a DC power adapter that plugs
into an AC wall outlet. As you can see, however, this
situation does not allow for remote battery
operation, as the card adapter requires AC.
4-pin FireWire
PCI FireWire cards — If you plan to connect the
PCMCIA, Cardbus or ExpressCard slot adapters
23