Siemens CU240B-2 - Page 50

Description
3.5 Supported motor series
Converter with the CU240B-2 and CU240E-2 Control Units
50 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
Some restrictions apply for operation:
Table 3- 7 Restrictions for operation with encoderless synchronous motors
Property
Restriction
Power Module
PM240-2
Firmware Firmware version ≥ FW V4.7
Applications Suitable for applications for steady-state operation in the range of the
rated motor speed:
• Conveyor drives
• Pumps
• Fans
Speed of the motor
• Speed ≤ rated motor speed
Operation is not permitted in field weakening.
• In steady-state operation ≥ 15% of the rated speed.
For accelerating and reversing functions, speeds 0 … 15% of the rat-
ed speed are permitted.
Switching on when motor
is rotating
The "flying restart" function is not possible.
Safety Integrated
Only "STO" is permitted by the safety functions integrated in the drive.
Ambient temperature of
motor
≤ 40° C
The inverter monitors the motor using a temperature model. The tem-
perature model presumes an ambient temperature of 40° C.
In the case of higher ambient temperatures, the inverter will no longer be
able to provide sufficient protection for the motor. If you operate the
motor in ambient temperatures > 40° C, you must reduce the power of
the motor sufficiently.
Information on temperature-dependent power de-rating can be found in
the motor manual.
Multi-motor drive
A multi-motor drive, i.e. simultaneously operating several motors connected to one inverter,
is permissible for standard induction motors in installations according to IEC.
Further information is provided in the Internet:
Multi-motor drive (http://support.automation.siemens.com/WW/view/en/84049346)
For installations in compliance with UL, multi-motor drive operation is not permissible.