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Assembly and Commissioning Instructions Servo amplifier D1-N
15.10.2015
DANGER!
Loss of safety function
Incorrect use of the safety function may result in it being lost. Note the require-
ments relating to use of the safety function.
Unexpected motor movements
When the STO safety function is active, the motor without an external brake
may move unexpectedly due to external load or its use in vertical applications.
Failure to comply with these instructions will result in death or serious
injury.
6.5.1
Category 0 stop 0
During a category 0 stop, the motor coasts to a standstill without braking. If this
uncontrolled movement represents a hazard (result of risk analysis), appropriate
measures must be taken.
6.5.2
Category 1 stop
A category 1 stop stops the drive in a controlled manner. The controlled stop is not
monitored by the D1-N. In the event of a power cut or error, controlled stopping is
not possible. Once the drive has been braked in a controlled manner, the final
stage is safety shut down by activating the STO function via the two safety inputs
SF1 and SF2. The two safety inputs are controlled using a standard safety module
with safe time delay.
6.5.3
Parking brake behaviour
When the STO safety function is triggered, the braking delay for motors with a
parking brake is not effective because when the STO function is active the motor
cannot produce any braking torque to bridge the time until the parking brake is
closed. Check whether additional measures need to be taken to prevent vertical
axes from sagging for example.
6.5.4
Vertical axes and/or external application of force
If external forces may result in an uncontrolled motor movement (e.g. gravity with
vertical axes) and thereby a hazard may ensue, the motor and/or axis must not be
operated without additional measures to protect against falling.
6.5.5
Unintended restart
To prevent the motor from restarting unintentionally once the power supply is re-
stored (e.g. after a power cut), input I1 "Motor enable" must be deactivated. Note
that a superordinate controller must not trigger an unintended restart.
6.5.6
Degree of contamination when using the safety function
Ensure that no conductive substances enter the device (degree of contamination 2).
Conductive substances may render the safety function ineffective.
