HB700 | CPU | PMC921xEx | en | 24-04 21
Use in difficult operating conditions
Requirements to clearance / creep-age current distances and system power supply
DIN EN 61131-2 The definition of clearance and creep-age current distances takes place in
accordance to EN 61
131-2. For the safe field bus coupler over-voltage cate-
gory 2 and degree of pollution 2 are basis.
DIN EN 13849 The acceptance of error exclusions for short-circuits between neighbouring
conductor or for short-circuits between neighbouring components must be
avoided as far as possible by suitable circuit and layout measures. If an error
exclusion is inevitable, measures are to be used in accordance with EN 13849
part of 2.
DIN EN 50178 The device is developed for operation on 24V power supplies, which corre-
spond to the PEL
V-/SELV regulations in accordance to EN 50178.
DIN EN 61508 The normative requirements of the 61508 (increased EMC requirements and
requirements concerning isolation) are to be fulfilled also for the common
voltage circuit of the SLIO system.
DIN EN 50178 So that the electrical values for extra-low voltage with safe separation cannot
be exceeded on the safe field bus coupler
, for the system 24V power sup-
plies are exclusively used, which correspond to the PELV /SELV regulations in
accordance with EN 50178.
In order to protect the safe field bus couplers against over-voltage, a suitable
over-voltage protection is provided.
DIN EN 60204-1 The 24V power supply must keep the voltage interrupt according to EN
60204-1.
Requirements for environmental and EMC testing
DIN EN 61131-2 Programmable logic controllers,
part 2: Equipment requirements and tests
DIN EN 62061 Appendix E For higher EMC immunity tests DIN EN 61326-3-1:2017 is applied.
1.18 Use in difficult operating conditions
W
ithout additional protective measures, the products must not be used in
locations with difficult operating conditions; e.g. due to:
−
dust generation
−
chemically active substances (corrosive vapors or gases)
−
strong electric or magnetic fields
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