Instruction Manual PSx3xxEC
31
4.11
Devices with optional snap brake
The device models PSx30x-14, PSx31x-14, PSx32x and PSx33x can be supplied
with an optional snap brake. This brake prevents the output shaft from turning when
the power supply to the motor is removed, or, if the motor holding torque is too low, to
a maximum of the level of the nominal torque. A small degree of rotation always
occurs at the output, i.e. the brake cannot be used to hold the drive at a defined
position (for this purpose where appropriate the holding torque might be increased
with the help of SDO #202B and SDO #2042).
To release the brake when a run command is transmitted, these devices first wait for
a short time and then run a few increments against the actual direction of movement.
The brake is closing at the end of every run (by default 1 sec after the end of the run,
SDO #2045). The advantage of this feature is, that in case of many subsequent runs
the brake has not to be released anew each time.
Manual turning:
When mounting or dismounting a PSx3xx, it may be necessary to manually turn the
output shaft to a certain position. For this purpose, the actuators are equipped with a
manual adjustment facility:
First, the corresponding cover in the cover must be removed.
Then use a NW3 (PSx31x, PSx33x, or NW4 (PSx30x, PSx32x) hexagon key to
disengage the brake by pressing it down and turn it simultaneously.An electrical
release of the brake via bus is not possible on its own (without travel job).
Important! To prevent ingress of dirt and dust, the protective cap must be
reattached after setting the address.
A "forced" turning of the drive without disengaging the brake leads to the
destruction of the brake and thus of the drive!
manual adjustement
under cover
PSx31x-14, PSx33x-14
PSx30x-14, PSx32x-14
