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Parking Brakes
Do not apply the brakes while the shaft is rotating except for emergency braking such as a mains
supply failure.
!
Where fitted, fail safe brakes are usually 24V dc, and are not polarity conscious. It is
recommended that you fit a reversed polarity diode across the brake coil, or at the relay
CAUTION
contacts, together with the appropriate R/C (Resistor/Capacitor) noise suppression.
To release the brake, the coil must be energised.
The brake can only take a limited number of emergency braking operations and must not be used for repeated
dynamic braking.
ATEX Unimotors UM and fm special conditions: Brakes must be changed if dynamic braking occurs and
purge system cleaned to ensure there is no brake dust.
Drive settings
You must ensure that the drive parameters are set correctly to give adequate thermal protection to
the motor.
Please refer to the Unimotor label when setting the limits for the drive. The value of the drive
!
parameters will vary with each type of motor. The stall current of the motor as printed on the
Rating Label of the Motor must be used as a maximum current limit set in the drive. Failure to
CAUTION
observe this recommendation will cause a risk of fire.
Incorrect setting of the current and thermal time constant could cause the motor to overheat and invalidate the
warranty.
All Unimotors are delivered with the commutation preset to match Control Techniques drives.
Always connect the thermistor wires to the Unidrive SP and Digitax ST Drive sensor circuits.
M'Ax and MultiAx drives do not have thermistor sensor circuits therefore Unimotors with SLM technology
fitted do not have thermistors.
Feedback Parameter Setting (for Digitax ST and Unidrive SP)
UM 75-190
A
C
fm 055
AR
CR
fm 075-250
AE
CA
hd 055-067
AR
CR
hd 089-115
AE
CA
3.26
drv
3.33
-
3.34
4096
3.35
-
3.36
5V
3.37
-
Ab.
3.38
Servo
3.41
-
*With 3.41 set to "ON" these parameters will be auto configured by the encoder.
**Recommended baud rate for cable length less than 20 meters (the baud rate depends on the encoder cable length)
-
-
-
-
-
-
EB*
EC*
FB*
-
-
-
EB*
EC*
FB*
drv
drv
drv
12*
12*
0*
2048*
32*
2048*
13*
19*
13*
8V
8V
8V
300
1500**
300
1500**
Sc.
Sc.
EnDat
EnDat
EnDat
EnDat
On
On
On
Feedback Device
-
K
M
-
-
-
-
MR
FC*
KA
MA
-
-
-
-
-
FC*
-
-
-
drv
drv
drv
drv
0*
-
-
-
32*
1024
2048
2048
19*
-
-
-
8V
5V
5V
5V
-
-
-
Ab.
Ab.
Ab.
Servo
Servo
Servo
On
-
-
-
6
R*
S*
-
-
-
-
TL*
EM*
RA*
SA*
-
-
-
-
TL*
EM*
RA*
SA*
-
-
drv
drv
drv
drv
12*
0*
12*
12*
1024*
1024*
128*
16*
15*
15*
12*
18*
8V
8V
8V
5V
-
-
-
1500**
Sc.
Sc.
Sc.
EnDat
Hiper
Hiper
Hiper
On
On
On
On
-
-
UL*
FM*
-
-
UL*
FM*
-
-
drv
drv
0*
0*
128*
16*
12*
18*
8V
5V
-
1500**
Sc.
EnDat
Hiper
On
On
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