Safety
Operating Manual PNOZ s50
1002194EN02
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To shut down the inductive load safely, the fast shutdown must be activated after the
slow shutdown. That way the load has a dualpole shutdown.
Measures to prevent unexpected startup
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Appropriate measures must be taken to prevent unexpected startup or unexpected
movements from plant standstill.
Wiring measures
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The effective current at terminals B1/B2 to supply the power circuits must not exceed
10 A. The cables must be fitted with a 10 A fuse, characteristic B/C.
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The cables for the unit's supply voltage (A1/A2) must be fitted with a 4 A fuse, charac
teristic B/C.
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The wiring must be designed to achieve sufficient noise immunity and protection
against emissions in terms of EMC. Please also refer to DIN EN 602041 (Electrical
equipment of machines).
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Appropriate wiring measures should be taken to avoid earth faults and shorts between
contacts.
Display
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The correct display of configuration data and messages are part of the device's safety
concept. If the display is faulty (e.g. pixels are missing, faulty letters or numbers), the
device must be taken out of service.
The machine manufacturer must check and verify the functionality of the employed safety
functions.
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The safety functions may only be checked by qualified personnel.
The safety function must be checked
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After initial commissioning
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After changing the configuration of the safety functions
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After swapping the PNOZ s50 or connected equipment
A full check comprises
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Proper execution of the employed safety functions
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Inspection of the parameters
The result of the check on each safety function must be documented in a test report. This
test report must be signed.
Regular checks
The PNOZ s50 uses appropriate tests to guarantee that it functions safely (see chapter en
titled "Function description", under "Output test"). It does not test the entire safety function.
You should check this at regular intervals. The aim of these regular checks is to uncover
any changes to the plant/machine, safety functions and ambient conditions. In particular
you should regularly check the function of the connected brake.
You must comply with the requirements of the applicable national regulations.
The intervals you select will depend on the application, the overall system and the associ
ated risk analysis.
