User Documentation

Weidmüller Interface GmbH Co. KG; Klingenbergstraße 16, 32758 Detmold-Germany
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 manufacturer declares compliance with other relevant Directives,
and all other safety related requirements including those of Annex II of this Directive.
Manually cut cross connections and cross connections with blank ends (ZQV´s ≥ 20 poles)
shall not be used.
Unused terminals shall be tightened.
When using the type WDK/WDU PE especially with other terminal blocks series or sizes or accessories the
requirements for clearance and creepage distances according to table 1 of 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.
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 WDK/WDK PE series is suitable for application in enclosures in atmospheres with flammable gases or
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.
Under normal operating conditions the temperature rise of the terminal blocks is maximum 40 K, measured at
the maximum permitted rated current. Due to the above mentioned, the terminal blocks may be used in
apparatus of temperature classes T6..T1 as long as the terminal block ambient temperature range is not
exceeded. No part of terminal block must exceed 110 °C under any condition.
T6 (- 60°C ... +40 °C)
T5 (- 60°C … +55 °C)
T4 (- 60°C ... +70 °C)
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.
Schedule of Limitations:
The WDK/WDU PE terminals are suitable for use in enclosures in atmospheres with flammable gases or
combustible dust. For flammable gases these enclosures must satisfy the requirements according to
EN 60079-0 and EN 60079-7. For combustible dust the enclosure must satisfy the requirements according to
EN 60079-0 and EN 60079-31.
The enclosure shall be constructed to block all sun and UV light from affecting the terminal blocks. The terminal
blocks shall be placed inside a suitable certified IP54 enclosure in type of protection “e” for gas atmosphere. For
dust atmosphere the terminal blocks shall be mounted inside a suitable certified enclosure (EN60079-31) in
type of protection “t”.
Version: WDK/WPE 1.5/R3.5 7556290 Index: 02 Date: 06.2019
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