Sound Devices 633 - Manual (Page 58)

Powering
The 633 features a Quad Powering configuration with PowerSafe technology. Any of three power
sources can be attached simultaneously: External DC power, 2 Rear-mounted L-Series batteries,
and internal AA batteries (NiMH or Lithium chemistries preferred) ( See “AA Battery Powering”, page
52 ). When multiple power sources are connected, the 633 will use only one source at a time. The
order of precedence for power sources is:
1. External DC power. (EX)
2. B1 L-Series battery. (B1)
3. B2 L-Series battery. (B2)
4. Internal AA batteries. (IN)
5. PowerSafe circuitry (Shutdown)
When the active power source is removed (or its voltage depleted), the 633 will display a notice on
the LCD indicating which source it is switching to.
To force a complete shutdown of the 633: Slide the Power switch to the Off position then press and
hold the Menu button for 5 seconds. The LCD will briefly flash to indicate that the unit is completely
powered down. This will turn off the timecode backup battery, requiring timecode to be rejammed
and user bits to be reset upon next power up.
External DC Powering
The 633 can be powered from any DC voltage from 10 to 18 VDC. Pin-4 of the locking, Hirose con-
nector is positive (+) and pin-1 is negative (–).
By default, the 633 will switch from external DC powering to the next available power source
when the voltage at the external DC connection drops below the voltage set in Setup Menu option
POWER > Ext DC Ref. Setting the external DC reference to a value appropriate for the type of battery
being used for external powering will maximize runtime with that battery.
The 633 can be configured to power down (instead of switching power sources) when the external
voltage drops below the external DC reference by setting Setup Menu option POWER > Ext DC Loss
to Shutdown. This option allows the 633 to be powered up and down by switching the external DC
power source on and off.
L-Mount Battery Powering
Up to two L-Series batteries can be attached to the rear of the 633. Several power capacities are avail-
able in this battery type, ranging from 1000 mAh to 7000 mAh. Larger amp-hour batteries provide
more run-time. The L-Series battery mounts are referred to as B1 and B2. The B1 mount is nearest to
the input panel and the B2 mount is nearest to the output panel.
The 633 uses only one L-Series battery at a time. When both batteries are mounted, B1 will be used
first. When the B1 battery is depleted or removed, the 633 will switch to B2 (if present).
AA Battery Powering
The 633 uses six AA-sized (LR6) batteries. The 633 can use NiMH, 1.5V Lithium, or Alkaline AA bat-
teries. Run time will be very limited when using Alkaline batteries (30 minutes to 1 hour, depending
on settings). NiMH or Lithium batteries are the preferred type because of the approximate 2x to 4x
run time compared to Alkaline batteries.
633 User Guide and Technical Information
52
v. 1.02 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
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