User Documentation

Weidmüller Interface GmbH Co. KG; Klingenbergstraße 16, 32758 Detmold-Germany
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.
For cross connection accessories current rating, resistance across the terminal please refer to
the table under “Technical data” above.
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.
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”.
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 ZDK 2.5 V and ZDK 2.5 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.
T6 (- 60°C ... +40 °C)
T5 (- 60°C … +55 °C)
T4 (- 60°C ... +70 °C)
Schedule of Limitations:
The Feed-through terminals and PE terminals of the ZDK-series 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.
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 Feed-through terminals and PE terminals of the ZDK-series are 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.
Manually cut cross connections and cross connections with blank ends (ZQV´s ≥ 20
poles) shall not be used.
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.
Version: ZDK 2.5 V; 10250293 Index: 02 Date: 05.2019
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