User Documentation

Weidmüller Interface GmbH Co. KG; Klingenbergstraße 16, 32758 Detmold-Germany
Note:
If smaller cross sections than the rated cross section are used, the belonging lower current has to be laid down
in the IECEx/EC-Type Examination Certificate of the complete apparatus.
Mounting instructions:
The WDU/WPE series is suitable for application in enclosures in atmospheres with flammable gases and
combustible dust. For use in flammable gases these enclosures must satisfy the requirements according to
IEC/EN60079-0 and IEC/EN60079-7. For use in combustible dust these enclosures must satisfy the
requirements according to IEC/EN60079-0 and IEC/EN60079-31.
Regarding the use of accessories the instructions of the manufacturer must be followed.
Unused terminals shall be tightened.
Essential Health and Safety Requirements:
Concerning ESRs this Schedule verifies compliance with the Annex III of ATEX directive only. By placing the
product on the market, the of this manufacturer declares compliance with other relevant Directives, and all other
safety related requirements including those of Annex II of this Directive.
Schedule of Limitations:
The feed through and protective conductor terminal blocks are suitable for use in enclosures in atmospheres
with flammable gases and combustible dust. For flammable gases these enclosures must satisfy the
requirements according to IEC/EN 60079-0 and 60079-7. For combustible dust these enclosures must satisfy
the requirements according to IEC/EN 60079-31.
The terminal blocks shall be placed inside a suitable IECEx/ATEX certified IP54 enclosure for gas atmosphere.
For dust atmosphere the terminal blocks shall be mounted inside a suitable IECEx/ATEX certified ‘t’ enclosure
(IEC/EN60079-31).
The enclosure shall be constructed to block all sun and UV light from affecting the terminal blocks.
Under normal operating conditions the temperature rise of the terminal blocks is max 40 K, measured with the
max permitted rated current. Due to the above mentioned the terminal blocks may be used in apparatus of
temperature classes T6…T1as long as the terminal block ambient temperature range is not exceeded as shown
below. No part of terminal block must exceed 110 °C under any condition.
T6 (- 60°C ≤ Tamb ≤ +40 °C)
T5 (- 60°C ≤ Tamb ≤ +55 °C)
T4 (- 60°C ≤ Tamb ≤ +70 °C)
When using the types WDU and WPE with other terminal blocks series or sizes or accessories, the
requirements for clearance and creepages distances according to table 1 of IEC/EN 60079-7 must be observed.
Regarding the use of covers, cross-connectors and end brackets the instructions of the manufacturer must be
followed.
For cross connection accessories, current rating, resistance across the terminal and torque values please refer
to the table under “technical data” above.
The terminal can be used with either one or two wires into either side of the terminal. When two wires are used
they must be of the same type, and of equal sizes. No other wire sizes or types than the ones specified in
instructions must be used. The terminal blocks must either be mounted next to another block of the same type
and size or with an end plate.
If smaller conductor cross sections than the rated conductor cross sections are used, then the corresponding
lower current shall be stated in the Certificate of the complete apparatus.
Version: WDU/WPE 35N 7799736 Index: 03 Date: 10.2018
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