Allen-Bradley PowerFlex 755 Reference Manual

Chapter 5
Module Configuration Attributes
480 Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
Rockwell specific identifier for the External Shunt Regulator. A value of 0
indicates use of a custom shunt regulator that requires user configuration.
External Shunt Power
Usage Access T Data Type Default Min Max Semantics of Values
Optional - BD Set REAL 0.20 0
Kilowatts
Rockwell specific identifier for the External Shunt Regulator. A value of 0
indicates use of a custom shunt regulator that requires user configuration.
External Shunt Pulse Power
Usage Access T Data Type Default Min Max Semantics of Values
Optional - BD Set REAL 0 0
Kilowatts
This attribute is used when an external shunt resistor has been configured. This
attribute value specifies the power that can be delivered to the external shunt
resistor for one second, without exceeding the rated element temperature.
There are approximations to help determine this attribute if this information is
not available from your vendor.
First approximation method, calculate 'Shunt Pulse Power' (Kilowatts) = 75,000 *
lbs, where lbs is the weight of the resistor wire element (not the weight of the
resistor).
Another method is that the thermal time constant = 'Shunt Pulse Power'
(Kilowatts) / 'Shunt Power' (Kilowatts) sometimes referred to as thermal mass.-
the time for the resistor element to reach 63% of rated temperature with applied
rated Kilowatts.
A third method for determining this value: The pulse Kilowatts for 1 second is
twice the watt rating of a 2 second pulse. In other words, the watt*sec rating is a
constant if the pulse duration is short compared to the thermal time constant of
the resistor ad is a function of the element mass.
External Bus Capacitance
Usage Access T Data Type Default Min Max Semantics of Values
Optional - BD Set REAL 0 0
Microfarads (µF)

Allen-Bradley PowerFlex 755 Specifications

General

Category	AC Drive
Amperage	2.2…1470 A
Output Voltage	0 to Input Voltage
Output Current	2.2…1470 A
Enclosure	IP20, IP30, IP54
Communications	EtherNet/IP, ControlNet, DeviceNet
I/O	Digital, Analog, Encoder, Relay
Safety	Safe Speed Monitor
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overload, Short Circuit, Ground Fault, Overtemperature
Operating Temperature	-10°C to 50°C (14°F to 122°F)
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Humidity	5…95% noncondensing
Altitude	Up to 1000m (3300ft) without derating
Voltage	200-240V AC, 380-480V AC, 500-600V AC, 690V AC
Input Voltage	200-240V AC, 380-480V AC, 500-600V AC, 690V AC
Control Method	Sensorless Vector