Operating instructions

Functions
5.10 Technological functions
CU240S and CU240E Control Units, FW 3.2
136 Operating Instructions, 03/2009, A5E02440075B AA
5.10.1.4 Parameterizing a motor holding brake
Motor holding brake applications
The motor holding brake prevents the motor turning when the inverter is switched-off. The
inverter has internal logic to control a motor holding brake.
The motor holding brake control inside the inverter is suitable for the following typical
applications:
● Pumps
● Fans
● Horizontal and vertical conveyors
Operating characteristics of the motor holding brake control after an OFF1 and OFF3 command
U%LW
3
I
PLQ
3
3
3
3RLQW
3RLQW
U%LW


W
W
W
W
W
I
%UDNH
6WDWXV
0RWRUH[FLWDWLRQ
ILQLVKHG
2))2))
21
2SHQ
&ORVHG
%UDNH5HOHDVH7LPH
%UDNH&ORVLQJ7LPH
Figure 5-12 Function diagram of the motor holding brake control after an OFF1 or OFF3 command
Controlling the motor holding brake after an OFF2 or STO command
For the following signals, the brake closing time is not taken into account:
● OFF2 command, or
● For fail-safe applications, in addition, after "Safe Torque Off" (STO)
After these control commands, the signal to close the motor holding brake is immediately
output independent of the motor speed.