Security Policy; Safe Force Output; Safe Speed Observance (Energy Limiting); Safe Input Signals According To Pld - Siemens SIDOOR ATD4 W Series System Manual

4.4.2

Security policy

The SIDOOR controllers ATD4xxW dispose of an extensive safety package. With the available
safety functions of the SIDOOR controller the requirements according to DIN EN ISO 13849-1 Cat
2 PL d (performance level) can be fulfilled.
The specifications of the performance level and the stop categories only refer to the examples
described in this section.
The determination of the performance level and stop categories must always be carried out by
the user in the overall system under consideration of all links of the safety chain.
The scope of the safety functions includes:

• Safe force output

• Safe speed observance (energy limiting)

• Safe input signals
4.4.2.1 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.
4.4.2.2 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.
4.4.2.3

Safe input signals according to PLd

SIDOOR ATD4xxW controllers have five digital inputs (see Digital input signals (Page 132)),
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
ATD4xxW for industrial applications
System Manual, 06/2022, A5E51901827B AA
WARNING
SIDOOR functions
4.4 Safety functions
117