User's Manual

Specifications
9
Power Specifications
The following table lists the power specifications for the internal DAT 72 and DDS-4
drives.
Specification
+12 VDC supply
+5 VDC supply
Voltage Tolerance
+ or – 10% operating
+ or – 7% operating
Operational Current
250 milliamps max
1.35 Amps max
Standby Current
15 milliamps max
1.2 Amps max
Surge (peak)
600 milliamps max
1.5 Amps max
Ripple (peak-to-peak)
≤
100 mV (peak to peak)
≤
100 mV (peak to peak)
Total power consumption for the DAT 72 is as follows:
Standby Power
6.5 watts max
Operating Power
8.7 watts typical, 10.0 watts max
Surge (start up)
20.0 watts max (instantaneous peak)
Note:
When measured over a 20-msec period, the maximum surge power is 14.0
watts.
Total power consumption for the DDS-4 (including both the +5V and +12V power
supplies) is as follows:
Standby Power
6.0 watts max
Operating Power
9.0 watts typical, 10.0 watts max
Surge (start up)
14.0 watts max
Note:
Surge power and current are measured over a 20-msec period.
The following table lists pin assignments of the power connector for the internal DDS.
Pin
Assignment
1
+12 VDC
2
+12 return
3
+5 return
4
+5 VDC
The external drives have a built-in power supply that senses the incoming voltage
and automatically adapts to voltages within the range of 100 to 240 volts, 50 to 60
Hz. The following table lists the power specifications of the power supply.
Specification
AC Input Voltage
100 (Japan)
120 (US)
240 (European)
AC Input Current
100 milliamps
85 milliamps
170 milliamps
AC Input Power
10.0 watts
10.0 watts
10.0 watts
Note:
The drive employs a power-sensing circuit that automatically detects a loss
of supply voltage from the host. Temporary loss of supply voltage, or voltage
spikes, might result in the drive electronics being reset to their initialized
state, but shall under no circumstances result in a loss of recorded data.