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Class 8839 Econoflex™ AC Drives
Sample Specifications
209
09/2003
© 2000–2003 Schneider Electric All Rights Reserved
F. For a fault condition other than a ground fault, short circuit or internal fault, an auto restart function
will provide up to 6 programmable restart attempts. The time delay before restart attempts will be
30 seconds.
G. Upon loss of the analog process follower reference signal, the AC Drive shall be programmable to
display a fault.
H. The AC Drive shall have a solid-state UL 508 C listed overload protective device and meet
IEC 60947.
I. The output frequency shall be software enabled to fold back when the motor is overloaded.
2.09 Adjustments and Configurations
A. The AC Drive will be factory programmed to operate all specified optional devices.
B. The acceleration and deceleration ramp times shall be adjustable from 0.05 to 999.9 seconds.
C. The memory shall retain and record run status and fault type of the past 8 faults.
D. The software shall have a Energy Economy function that, when selected, will reduce the voltage to
the motor when selected for variable torque loads. A constant V/Hz ratio will be maintained during
acceleration. The output voltage will then automatically adjust to meet the torque requirement of
the load.
2.10 Keypad Display Interface
A. The keypad display interface shall offer the modification of AC Drive adjustments via a touch
keypad. All electrical values, configuration parameters, I/O assignments, application and activity
function access, faults, local control, and adjustment storage, and diagnostics shall be in plain
English. There will be a standard selection of 4 additional languages built-in to the operating
software as standard.
B. The display will be a high resolution, LCD back-lit screen.
C. The AC Drive model number, torque type, software revision number, horsepower, output current,
motor frequency and motor voltage shall be listed on the drive identification portion of the LCD
display.
D. The keypad display shall consist of programmable function keys that allow both operating
commands and programming options to be preset by the operator. A hardware selector switch shall
allow the terminal keypad to be locked out from unauthorized personnel.
2.11 Operator Controls
A. The control power for the digital inputs and outputs shall be 24 Vdc.
B. The internal power supply shall incorporate automatic current fold-back that protects the internal
power supply if incorrectly connected or shorted. The transistor logic outputs will be current limited
and will not be damaged if shorted.
C. Pull-apart terminal strips shall be used on all logic and analog signal connections in the power
converter.
D. Two voltage-free relay output contacts will be provided. One of the contacts will indicate AC Drive
fault status. The other contact shall indicate a drive run status.
E. The Drive Controller enclosure shall have the following dedicated operator controls as required for
the application:
• Hand-Off-Auto switch [Start-Stop pushbutton and Hand-off-Auto switch] [Start-Stop pushbutton]
• Manual Speed Potentiometer
• AFC-Off-Bypass switch
• Test-Normal Selector switch
• Power On (red) LED indicator
• Drive Run (green) LED indicator
• Drive Fault (yellow) LED indicator
• Auto Mode (yellow) or Bypass Run (yellow) LED indicator