FEC MICRO NR User Manual
Page 22
Chapter 2: Specifications
Page 2-2
2.1
Main Specifications
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Power Supply Voltage
P
100~240 VAC, Single Phase, 50/60 Hz (24VDC Output)
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Operating Power Requirements
PPPP
180Watt
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Installation Requirement
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NEMA 12 enclosure (minimum).
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Range of Operation
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Duty cycle below 60% (reference Section 2.2 Duty Cycle Calculation)
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Operating Conditions (may be met by incorporating an Air Handling Unit into System)
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Temperature: 0° ~ 50°C (32° ~ 122°F)
Humidity: 20% ~ 90%, no moisture
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Storage Conditions
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Temperature: -5° ~ 55°C (23° ~ 131°F)
Humidity: Below 90%, no moisture
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Shipping Conditions
P
Temperature: -5° ~ 55°C (23° ~ 131°F)
Humidity: Below 90%, no moisture
2.2 Duty Cycle Calculation
Duty Cycle is rated as a percentage of the time the motor is running to the time the motor is idle.
This is an important factor in determining overload protection for Servo Amplifiers and motors as
it directly relates to the amount of power or heat dissipation of the motor / servo package. The
rated duty cycle for the Micro NR System is calculated as follows:
Tool Rotation Time
X 100 = Duty Cycle Percentage (%)
Total Cycle Time (Tool Rotation + Tool Waiting)
Example:
Tool Rotation Time = 3 Seconds x 100 = 25% Duty Cycle Percentage
Total Cycle Time =
12 Seconds
As a general rule, duty cycle, should not exceed
60
%. IF duty cycles remain above 60% for ex-
tended periods, a Servo Amplifier Error / Overload will result (See abnormal CODE 8 -10). Pro-
tection for high duty cycle is a standard feature of the Servo Amplifier to prevent servo or motor
damage.