Technical description
Synchronous servomotor 17Version: 2.1
6.3.10 Feedback-System
Feedback-System Resolution System accuracy Comment
OCT, Singleturn
OCT, Multiturn
18 Bit ± 120 Angle sec. approx. 0.03° Standard
Resolver 14 Bit ± 600 Angle sec. approx.0.17° Option:
AM812x, AM813x and AM814x
Feedback exchange
The feedback system installed can only be replaced with an identical system. Retrofitting a different
system is not possible.
6.3.11 Holding brake
WARNING
Serious risk of injury!
The holding brake is not personal safety. If the brake is released then the rotor can be moved without a re-
manent torque!
The motors are optionally available with an in-built holding brake free from backlash. The permanent magnet
brake blocks the rotor in de-energised state. The holding brakes are designed as standstill Brakes and
are not suited for repeated operational braking.
The holding brakes can be controlled directly by the servo terminal (no personal safety!). The brake voltage
is then switched off in the servo terminal — no additional wiring is required.
If the holding brake is not controlled directly by the servo terminal, additional circuitry (e.g. varistor) is
required. Consult our applications department beforehand.
The maximum number of brake cycles is 10 million.
Motor length
The motor length depends on the built-in holding brake, among other factors. It is not possible to fit
one at a later date.
6.3.12 Pole number
Motor Pole number
AM811x 6
AM812x 6
AM813x 8
AM814x 8
6.4 Options
Holding brake
The holding brake is integrated in the motor. It increases the motor length and the rotor moment of inertia.
Radial shaft-sealing ring
Radial shaft-sealing ring (FKM) for sealing against splash water. This increases the protection class of the
shaft bushing to IP65.
Feather key
The motors are available with feather key groove and fitted feather key according to DIN6885. The rotor is
balanced with half a feather key.
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