Controllers
6.3 Safety concept ATD4xxW
AT40, ATD400V, ATD400K, ATD4xxW, ATD400S, ATE250S, ATD400T
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System Manual, 06/2016, A2B00096162-AN
6.3
Safety concept ATD4xxW
The SIDOOR controllers ATD4xxW dispose of an extensive safety package. The safety
functions fulfill the requirements according to DIN EN ISO 13849-1 Cat 2 PL d (Performance
Level).
The scope of the safety functions includes:
●
Safe force output
●
Safe speed observance (energy limiting)
●
Safe input signals
6.3.1
Safe force output
The maximum forces configured by the user must always be observed for safety reasons.
The safe force output of the SIDOOR system ensures that the torque output by the motor
does not increase in case of an error. Unintentional increases in the torque are recognized
and result in a defined error response.
6.3.2
Safe speed observance (energy limiting)
The speeds configured by the user must always be observed for safety reasons. The safe
speed observance of the SIDOOR system ensures that the energy of the door does not
increase in case of an error. Unintentional increases in speed are recognized and result in a
defined error response.
6.3.3
Safe input signals according to PLd
SIDOOR ATD4xxW controllers have five digital inputs (see Auto-Hotspot) through which
safety-related signals can also be sent. This Section describes two different methods for
transferring safety-related signals to the controller.
Two concepts are also presented for two-hand operation and emergency stop applications.
The concepts described in this Section for implementing safe input signals according to PLd
(Performance Level d) enable detection of the following faults:
●
Discontinuity of one single terminal
●
Short-circuit between any two terminals
●
Stuck-at fault (short-circuit to 1 and 0 in the case of an isolated input or an interrupted
output)
●
Static signal "0" and "1" at all inputs and outputs, individually or simultaneously
●
Parasitic oscillation of outputs
●
Modification of characteristic values (e.g. input/output voltage of analog devices)
