Instruction Manual PSx3xxPL
29
k) Devices with optional holding brake
The device models PSx30xPL-14, PSx31xPL-14, PSx32xPL and PSx33xPL can be
supplied with an optional holding 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.
To adjust the position of the drive manually, it is first necessary to remove the rubber-
plug in the top cover (if required, consider drawings on the website). Then release the
brake by pressing down and simultaneously turning using a hex wrench NW3
(PSx31xPL and PSx33xPL) or NW4 (PSx30xPL and PSx32xPL).
l) Devices with optional friction brake
The device model PSE34xxPL can be supplied with an optional friction 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.
A run command is not approached immediately but only after a short idle period to
tighten the brake.
The brake releases at the end of every run.
To adjust the drive manually, it is first necessary to remove the corresponding rubber-
plug in the top cover (if required, consider drawings on the website). The drive can
then be rotated using a hex wrench NW4. This is quite difficult as the operator has to
overcome both any torque present at the output and the force of the friction brake.
Summary of Contents for PS*3**PL series
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