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ADAT-4 User Guide
Page 12
External Power
About Power Supplies
An external power supply conforming to the specifications listed in the following “Power Supply
Specifications” section must be used to guarantee that published SoundPals performance
figures are met. Any power supply meeting these specifications will supply adequate power for a
single SoundPals module. Although the specification is written for power supplies running from
AC line inputs, DC (battery) sources may be used if they meet all of the listed requirements.
CE Compliance
For CE compliance, the power supply that you use must comply with the following requirements:
• Low Voltage Directive 73/23/EEC
• EMC Directive 89/336/EEC
• EMC Directive 93/68/EEC
• The connector locking ring must be tight.
Portable Power Sources
For portable SoundPals power sources, sealed lead-acid, nickel cadmium or alkaline primary
batteries may be used. However, the maximum voltage must not exceed 8.6 volts, and a
minimum of 5.6 volts is required for normal operation. Maximum current drain will be 215mA.
Power Supply Specifications
The following specifications must be met over all anticipated operating conditions including AC
power line range, temperature range, etc.
Parameter Specification
Output voltage 5.6 V minimum (measured at trough of ripple) at 215 mA constant current.
8.6 V maximum (measured at peak of ripple) at 140 mA constant current.
Ripple voltage 2 V p-p at 700 mA constant current.
400 mV p-p at 700 mA constant current with external 2200
µF capacitor.
Connector Switchcraft 761K with center positive, sleeve negative.
Power Supply Sources
In addition to the GPS-supplied universal power supply, the following power supplies meet the
SoundPals requirements:
Company Model Note
Stancor STA-4860 120V AC, 60 Hz
Stancor STAF-0797F 220V AC, 50 Hz with European wall plug (CE compliant).
Elpac MI2007 95-250V AC, 47-63 Hz with IEC inlet (line cord required). Will power up to six
units (CE compliant).