1. Clean the shaft of the motor
4
.
The coupling will only grip without slipping on a shaft pin which is dry and free of
grease.
If fat solvent media enters the bearing, it will wash out the service life lubrica-
tion of the bearing.
2. Place the EMMS-ST on the motor flange
5
.
3. Connect the motor to the mechanical components at the through-holes
3
.
Ready to use motor kits for linear drives can be found in the Festo accessories.
4. Tighten the fastening screws (
Instructions on drive and motor kits).
5
Commissioning
Note
The motor can unexpectedly be started if the holding brake is released.
• Make sure that the motor windings are not energized before the holding brake
is released.
• Apply current first to the holding brake. The motor will then rotate freely. De-
pending on the type of device, the controller will unlock the holding brake
automatically.
• Complete the commissioning of the motor in conjunction with the controller in
accordance with the controller manual.
6
Operation
Warning
Hot parts of the housing can cause burning.
• Make sure that people and objects cannot come into direct contact with the
motor.
7
Care and maintenance
Warning
Burnt dust can under circumstances catch fire.
• Clean the motor housing of dust regularly.
8
Dismantling and repairs
Warning
Masses which suddenly slide down may cause injury to people in the vicinity of
the EMMS-ST.
• Make sure that the work load on the operating linear drive is in a safe position
(e. g. in the case of a vertical drive in the lower end position).
• You can now remove the EMMS-ST from the linear drive.
If repairs are required:
• return the motor to Festo.
Repairs by Festo will maintain the safety standards.
• Mount the EMMS-ST again as follows:
1. Push the slide or the cantilever of the linear axis into a safe position.
2. Fit the motor kits in accordance with the specifications in the assembly instruc-
tions.
9
Accessories
Note
• Please select the corresponding accessories from our catalogue
www.festo.com/catalogue
10
Eliminating faults
Fault
Possible cause
Remedy
Motor shaft does not turn
Load too high
Reduce motor load
Controller not yet enabled
Check controller signals
Holding brake active (only
with EMMS-ST-…-SB/-SEB)
Release holding brake
Motor shaft rotates in the
wrong direction
Cabling fault
Check cabling
Motor stops in wrong position
Stepper fault
Repeat reference run
Fig. 4
11
Technical specifications
EMMS-ST-57-S-…-G2
S
SE
SB
SEB
Nominal motor voltage
[V]
48
Nominal motor current
[A]
5
Holding torque, motor
[Nm]
0.8
Stepper angle (full step)
[°]
1.8 ± 5 %
Winding resistance
[Ω]
0.15 ± 10 %
Winding inductance at 1 kHz
[mH]
0.5
Moment of drive inertia
[kgcm
2
]
0.29
0.30
Voltage of the brake
[V]
–
24
Output of the brake
[W]
–
8
Holding torque of the brake
[Nm]
–
0.4
Brake response delay
[ms]
–
2
Brake separation time
[ms]
–
10
Pulse/rotation
–
500
–
500
Zero pulse
–
Yes
–
Yes
Line driver (RS422 protocol)
–
Yes
–
Yes
Operating voltage of encoder
[V DC]
–
5
–
5
Radial shaft load
5 mm distance from flange
[N]
130
20 mm distance from flange
[N]
52
Axial shaft load
[N]
10
Insulation protection class
(tested with DC 500 V/1 min.)
B
Duty cycle (for UL-compliant appli-
cation)
[min]
1 (on) / 1 (off )
Protection class (when fitted)
IP54
Ambient temperature
[°C]
–10 … +50
CE mark (see declaration of con-
formity)
1)
In accordance with EU EMC directive
Max. relative humidity
(nn condensing)
[%]
80
Max. cable length
[m]
30
Product weight
[kg]
0.87
0.97
1.09
1.15
1)
In residential areas, measures for radio interference suppression may have to be taken.
Fig. 5
UL certification information
Product category code
PRHZ2 (USA) or PRHZ8 (Canada)
Certificate number
E342973
Standards taken into account
UL 1004-1/-6, C22.2 No.100-04
UL test symbol
Fig. 6
12
Characteristic curves
Rated voltage 48 V
24 VDC
48 VDC
72 VDC
24 VDC ¼ Step
48 VDC ¼ Step
Fig. 7
