KROHNE SU 501 EX EN - Manual (Page 10)

A SU 501 Ex in Ex version is an auxiliary, intrinsically safe
instrument and must not be installed in hazardous areas.
Before setup, the Ex separating chamber must be attached (as
shown below) with Ex versions. Safe operation can be only
ensured if the operating instructions manual and the EU type
approval certificate are observed. SU 501 Ex must not be
opened.
Close the upper terminals acc. to the following illustration.
1 2 4 3
Fig. 3: Mounting the separating chamber
All signal conditioning instruments are provided with different
gaps dependent on type and version (mechanical coding).
The plug-in socket is provided with coded pins that can be
inserted to prevent accidental interchanging of the various
instrument types.
With a SU 501 Ex in Ex version, the supplied coded pins (type
coded pin and Ex coded pin) must be inserted by the user acc.
to the below chart.
Ex separating chamber
Instrument coding
10 SU 501 Ex - Signal conditioning instrument
Mounting
27953
-EN
-050616