Siemens SIMATIC S5 1P 243, Operating Instructions & Installation Instructions

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● Requirements according to IEC/EN 60204‑1
● Requirements according to IEC/EN 60079-14 when used in Zones 1, 2 or 21, 22
● Configuration notes
6.2 Connecting
6.2.1 Installing intrinsically safe circuits
Make sure that there is potential equalization along the entire length of the intrinsically safe
power circuit when intrinsically safe circuits are set up.
A stranded wire is used as the potential equalizing cable. A copper braided strip is used to
ensure potential equalization between the cable entry plate and the terminal box enclosure.
Table 6-1 Electrical data
Non-intrinsically safe power circuit U
m
= 700 V alternating voltage
Intrinsically safe power circuit in "fail-safe" type of protection
Ex ib IIB/IIC, only connected to certified intrinsically safe circuits that are
galvanically isolated from ground.
Maximum values for total:
IIB IIC
e.g. at T4: U
i
= 28 V U
i
= 24 V
I
i
= 300 mA I
i
= 170 mA
P
i
= 1,3 W P
i
= 1,3 W
The effective internal inductance and capacitance are negligibly small.
The intrinsically safe circuits are safely galvanically isolated from all non-intrinsically safe
circuits up to a peak value for the rated voltage of 1000 V. Please refer to the additional plate
on the machine for the maximum values for "intrinsically safe power circuits".
Electrical connection
6.2 Connecting
LOHER CHEMSTAR 1PS5
56
Operating Instructions 03/2014