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Power Requirements
Power Cord for Wall-Mounted Charging Station
Two hospital-grade AC power cords are provided with the Charging Station, enabling use of the correct plug for
your power source.
• Use of non-NDS AC power cords can void the Warranty.
• Disconnect the power cord from the AC mains. The power cord is the only recognized disconnect device.
• MEDICAL EQUIPMENT should be positioned so that the disconnect device is readily accessible.
• When used in the U.S. at voltages over 120 volts, the Charging Station must be powered from a center-tapped
circuit.
• The Charging Station must be installed in a location with easy access to the AC mains power source.
Power Modules for ZeroWire Mobile Stand
Use only NDS power modules.
• To power off the ZeroWire Mobile stand, remove both power modules from the stand docks.
• The ZeroWire Mobile stand must be positioned in a location with easy access to the stand docks.
Power Module Requirements
The capacity of a fully charged power module is 10 Ah. A power module at 10% or 1 Ah capacity is considered to
be fully discharged, with a marginal charge needed to maintain system functionality.
Power modules not in active use self-discharge at an average rate of < 1 mA/hour.
Operation
First Use Charge Requirement
Prior to first use after storage or transportation, power modules must be charged to full capacity to set an
internal benchmark used to calculate percentages of capacity for accurate display of charge levels during use.
Active Use Charge Requirement
At least once every 30 days, power modules in active use must be fully charged from a discharged state to
maintain accurate display of charge levels and to maximize life of the unit. This is typically accomplished in the
process of normal usage.
Power Module Storage
Power modules to be placed in long-term storage should be charged initially to at least an 80% level to provide a
5 Ah buffer charge, from which self-discharge would take approximately 4000 hours (166 days or 5.5 months) to
reach the fully discharged 10% level.
Check on charge levels beginning at around 40 days after being placed in storage, and charge back to at least
80% when levels have dropped to 30%. It is important to maintain a charge level above 10% to prevent
discharge cut-off (see "Discharge Cut-Off" on page 20).
Shipping
Prior to shipping, power modules should have a limited charge of 30% or less (three LED bars).
Warning: Power modules contain Lithium, and are classified as Class 9 Dangerous Goods for
transportation, requiring that all national and international regulations be observed. Check with your
local transport representative for advice on shipping in your region. For information regarding return of
damaged or faulty power modules, contact NDS Customer Service.
6 | General Specifications
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