User Documentation

Weidmüller Interface GmbH Co. KG; Klingenbergstraße 16, 32758 Detmold-Germany
When using the types of disconnect terminals especially with other terminal blocks series or sizes or accessories
the requirements for clearance and creepage distances of EN 60079-7 must be maintained. 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 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.
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.
WARNING – Do not remove or replace the test disconnect switch (AAP21 4 DT) when energized!
– Do not remove or replace the test fuse disconnect switch (AAP21 4 FS) when energized!
T6 (- 60°C ... +40 °C)
T5 (- 60°C … +55 °C)
T4 (- 60°C ... +90 °C)
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.
Mounting instructions:
The Feed-through terminals of the A-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.
In combination with other terminal block series and sizes and if other accessories are used, the applicable creepage
and clearance distances shall be met.
Regarding the use of accessories the instructions of the manufacturer must be followed.
Schedule of Limitations:
The Feed-through 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 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 130 °C under any condition.
Version: AAP21 10 LO;12072844 ; Index: 01; Date: 04.2018
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