Allen-Bradley PowerFlex 70 Reference Manual

4-2 Selecting An External Resistor
Protecting External Resistor Packages
Figure 4.1 External Brake Resistor Circuitry
!
ATTENTION: PowerFlex drives do not offer protection for externally
mounted brake resistors. A risk of fire exists if external braking
resistors are not protected. External resistor packages must be
self-protected from over temperature or the protective circuit show
below, or equivalent, must be supplied.
Power On
R (L1)
S (L2)
T (L3)
Power Source DB Resistor Thermostat
Power Off
M
M
(Input Contactor) M
Three-Phase
AC Input

Allen-Bradley PowerFlex 70 Specifications

General

Input Voltage	200-240V AC, 380-480V AC, 500-600V AC
Frequency Range	0 - 400 Hz
Humidity	5% to 95% non-condensing
Output Voltage	0 to Input Voltage
Control Methods	Sensorless Vector Control
Communications	Ethernet/IP, DeviceNet, ControlNet
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Ground Fault
Operating Temperature	0°C to 50°C (32°F to 122°F)
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Enclosure Rating	IP20, NEMA Type 1