Pilz PSSu E F AI U - Manual (Page 10)

Safety
Operating Manual PSSu E F AI U(­T)(­R)
21993­EN­05 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 AI U and PSSu E F AI U­T 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.
The module provides an analogue input.
To guarantee safety integrity you will need to use 2 analogue input modules (2 PSSu E F AI
U or one PSSu E F AI U + one PSSu E F AI I). PL e (Cat. 4) and SIL CL 3 can be achieved
as a result of redundant input data.
The module guarantees functional safety, but not the safety of the entire process.
Please note the following during configuration and within the user program:
} With 2­channel operation, check the feasibility by using two inputs and two sensors.
Take appropriate measures to avoid common cause errors in the sensor technology, by
using diverse sensors or a separate supply voltage for the sensors, for example.
} We recommend that you monitor a defined measuring range of 2 … 10 V, as an open
circuit or short circuit cannot be detected at 0 V, for example.
The measured value is attenuated through the input filter. At the cutoff frequency, the amp­
litude of the measured value is 70 % of the amplitude of the input signal.
We strongly recommend the use of the following function blocks:
} FS_AnalogueInputSingle (using one input)
} FS_AnalogueInputDual (using two inputs)
The function blocks contain "Feasibility check" (only on FS_AnalogueInputDual) and "Limit
value monitoring" functions, which enable you to detect errors in the sensor as well as the
wiring. For the "Range monitoring" function we recommend that you use a measuring range
of 2 … 10 V.
The module PSSu E F AI U­T is suitable for use where there are increased environmental
requirements (see Technical Details).
The module PSSu E F AI U­R is suitable for use where there are increased environmental
requirements demanded by railway applications (see Technical Details).
Intended use includes making the electrical installation EMC­compliant. Please refer to the
guidelines stated in the "PSSuniversal Installation Manual". The module is designed for use
in an industrial environment. It is not suitable for use in a domestic environment, as this can
lead to interference.
The following is deemed improper use in particular:
} Any component, technical or electrical modification to the module
} Use of the module outside the areas described in this manual
} Any use of the module that is not in accordance with the technical details.