User Documentation

Weidmüller Interface GmbH Co. KG; Klingenbergstraße 16, 32758 Detmold-Germany
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.
When using the types ZDU and ZPE with other terminal blocks series or sizes or accessories, the
requirements for clearance and creepages distances according to 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.
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 ZDU/ZPE 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.
Schedule of Limitations:
The feed through and protective earth terminal blocks 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 IEC/EN 60079-0 and 60079-7. For combustible dust these
enclosures must satisfy the requirements according to IEC/EN 60079-31.
For cross connection accessories the current ratings and the resistances across the terminals please
refer to the table under “Technical data” above.
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.
T6 (- 60°C ... +40 °C)
T5 (- 60°C … +55 °C)
T4 (- 60°C ... +70 °C)
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.
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”.
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.
Version: ZDU 2.5-2/4AN; 10651016 Index: 01 Date: 06.2019
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