Beckhoff PS9031-4820-0001, Documentation

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Technical data, application notes, wiring
PS9031-4820-0001 23 1.0
4.18 Protective functions and safety features
Protective functions
Insulation resistance > 500MOhm In the delivery state between the mains power connection and sig-
nals, measured with 500 Vdc
> 500MOhm In the delivery state between the mains power connection and the
housing, measured with 500 Vdc
> 500MOhm In the delivery state between the signal connections and the hous-
ing, measured with 500 Vdc
PE resistance < 0.1 ohm Resistance between the chassis ground terminal and the housing.
Protection class N/A Install the buffer module according to the rules of Class III
Protection class / ingress protection IP 20 EN/IEC 60529
Overtemperature protection -
Output overvoltage protection Typ. 58Vdc
Max. 60Vdc In the event of a defect in the internal buffer module, a redundant
circuit limits the maximum output voltage. The buffering stops and
automatically attempts to restart.
Internal input fuse -
Overvoltage protection at the input Max. 60Vdc Device not damaged or defective
Reverse polarity protection at the input Max. -60 Vdc Device not damaged or defective
Touch current (leakage current) The leakage current generated by the buffer module itself depends on the input voltage ripple
and must be investigated in the final application. With an even DC input voltage, the leakage
current generated is less than 100 μA.
4.19 Dielectric strength
The output voltage is earth-free and has no ohmic connection to earth.
Type and component tests are carried out by the manufacturer. Field tests can be performed in the field
using suitable test equipment that ramps up the voltage with a slow ramp (2s rising and 2s falling). Connect
all input terminals and all output poles to each other before performing the tests. During the test, set the cut-
off current to the value shown in the table below.
18: Dielectric strength
A B C
Type test 60s 500 Vac 500 Vac 500 Vac
Component test 5s 500 Vac 500 Vac 500 Vac
Field test 5s 500 Vac 500 Vac 500 Vac
Settings for the field test cut-off
current > 1 mA > 1 mA > 1 mA