Siemens SIPART PS2 Compact Operating Instructions page 23

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Figure 15 Two-wire connection for 2-, 3-, 4-wire version, Zones 2 and 22 "Ex n"
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Figure 16 Three/four-wire connection, Zones 2 and 22 "Ex n"
SIPART PS2 (6DR5...)
A5E03436620-01, 03/2011
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