User Documentation

Weidmüller Interface GmbH Co. KG; Klingenbergstraße 16, 32758 Detmold-Germany
Warning:
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.
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 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.
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.
T6 (- 60°C ... +40 °C)
T5 (- 60°C … +55 °C)
T4 (- 60°C ... +70 °C)
When using the types ZDUB 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.
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.
Always ensure that the conductor is placed between the tension clamp and cross connection ZQB
2.5. In this case the conductor cross-section is limited to 1,5 mm².
Regarding the use of accessories the instructions of the manufacturer must be followed. The ZDUB 2.5-2/2AN/RC
and ZDUB 2.5-2/4AN/RC terminal blocks have a snap-in clip for mounting on a mounting plate. The thickness of the
mounting plate shall vary between 0.5 - 1.0 mm. The diameter of the hole must be 3.5 mm. A hole spacing of 5.1 mm
for the ZDUB 2.5-2/2AN/RC and 10.25 mm for the ZDUB 2.5-2/4AN/RC must be used for mounting the terminal
blocks. Further information can be found in the following sketch.
ZDUB 2.5-2/2AN/RC ZDUB 2.5-2/4AN/RC
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.
For cross connection accessories the current ratings and the resistances across the terminals please refer to the
table under “Technical data” above.
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: ZDUB 2,5-2/.../RC; 1353240 Index: 00 Date: 12.2018
3