
7
Startup
Motors with backstop /RS
Operating Instructions – EDR..71 – 315, EDRN63 – 315
133
7.5
Motors with backstop /RS
An /RS backstop is used to block/prevent a direction of rotation of the motor. The di-
rection of rotation is indicated by an arrow on the fan guard of the motor or on the
device housing.
Observe the direction of rotation of the end shaft and the number of stages when you
mount the motor to the gear unit. Do not start up the motor in blocking direction (note
the correct phase angle when connecting the motor). For inspection purposes, you
can operate the backstop once with half the motor voltage in blocking direction.
If a conversion is required to change the blocking direction, follow the instructions in
chapter "Altering the blocking direction on motors with a backstop" (→
180).
7.5.1
Limit speed of the backstop
If a motor is equipped with a backstop, the sprag lift-off speed represents the lower
speed limit during operation on an inverter.
Motors
Locking torque
Lift-off speed of
clamping parts
Maximum speed
Nm
min
-1
min
-1
–
EDRN63
95
890
5000
EDRS71
EDRN71
95
890
5000
EDR..80
EDRN80
130
860
5000
EDRE90/100
EDRN90/100
370
750
5000
EDRE112/132
EDRN112/132S
490
730
5000
EDRE160
EDRN132M/L
700
700
4500
EDRE180
EDRN160/180
1400
610
4500
EDRE200/225
EDRN200/225
2500
400
3500
EDRE250/280
EDNR250/280
2600
400
2600
EDRE315
EDRN315
6300
320
2500
25896334/EN – 06/2019