Siemens SM 331 Manual De Instrucciones página 7

English
• During installation the cable compartment (6ES7393-4AA00-0AA0) must be used or a minimum
distance of 50 mm (minimum thread length) must be ensured between the non-intrinsically safe
circuits by inserting a partition, or the connection components must provided with additional insulation
(e.g. with shrinkdown tubing).
Power lines with core end sleeves
Cable
compartment
Ex [i] signal lines with core end sleeves
It may also be the case that the minimum thread length is not observed between the individual
modules, for example when explosion-protected and standard modules are used in combination. If the
minimum thread length between conducting parts of explosion-protected and standard modules is
< 50 mm, the possibilities open to you for maintaining the thread length between the modules are as
follows:
1. Use the Ex isolating bar (6ES7 195-1KA00-0XA0) in connection with bus modules with an active
backplane bus.
2. If you do not use a bus module with an active backplane bus, you can also use the dummy module
DM 370 (6ES7 370-0AA01-0AA0).
• In order to use the measurement inputs with the stated peak values for connecting to active (remotely
supplied) transmitters, the unused measurement transducer outputs 3 and 12 on the front plug
connectors must be covered with appropriate plastic caps.
• When completing the wiring you must take care that there is strict separation of intrinsically safe and
non-intrinsically safe cables. They must be run in separate cable ducts.
• The analog module must be operated with "safe functional extra-low voltage". This means that even
in the event of a fault these modules are exposed to a voltage of only Um ≤ 250 V.
A5E42132375-AA
Process connector
with screw
connection
English