Pilz PSSu E F INC - Manual (Page 10)

Safety
Operating Manual PSSu E F INC(­T)
1001454­EN­07 10
3 Safety
3.1 Intended use
The module may be used for failsafe applications in system environment B (automation
system PSS 4000).
The modules PSSu E F INC and PSSu E F INC­T may be used as a safety component in
accordance with the Lifts Directive 95/16/EC, EN 81­1, EN 81­2 and EN 115­1.
The programmable safety system should be installed in a protected environment that meets
at least the requirements of pollution degree 2. Example: Protected inside space or control
cabinet with protection class IP54 and corresponding air conditioning.
With the counter module you can implement the following safety functions:
Monitoring of:
} Position
} Speed
} Standstill
To guarantee safety integrity you will need to use
} 2 sensors and
} 2 counter modules: a PSSu E F INC and a PSSu E F ABS SSI and
} the function blocks FS_IncrementalEncoder, FS_AbsoluteEncoder and FS_Counter­
Dual
eingesetzt werden.
This means that with redundant and diverse input values, PL e and SIL CL 3 can be
achieved.
To apply the module you will need to have read and understood the description of the func­
tion blocks (s. Online help).
Requirements of the PSSu system:
} The counter modules must be part of a control system PSSu PLC or PSSu multi (not
decentralised I/O system).
} The function blocks have to be assigned to the FS resource of the PSSu system where
the counter modules are inserted. Control via SafetyNet is not permitted.
Demands on the sensors:
} Incremental encoders with RS422 interfaces may be used as sensors.
} Connect the sensors mechanically independently to the axis. If this is not possible, the
connection should be positive­locking without wearing parts as e.g. chains or drive
belts. If it is not possible to avoid this, the mechanical connection of the sensors must
be monitored.
Alternatively, it is possible to use a sensor that internally has 2 independent measured
value recording systems.
Please note during configuration and within the user program:
} The input values must be diverse. This can be achieved through different
} Scaling
– Direction of rotation/count direction