User Documentation

Weidmüller Interface GmbH Co. KG; Klingenbergstraße 16, 32758 Detmold-Germany
Regarding the use of accessories the instructions of the manufacturer must be followed.
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.
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.
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.
When using the types ALO 16 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 please refer to the table under
“Technical data” above.
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.
Schedule of Limitations:
The Supply terminal 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.
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”.
Manually cut cross connections and cross connections with blank ends (ZQV´s ≥ 20 poles) shall not be
used.
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.
T6 (- 60°C ... +40 °C)
T5 (- 60°C … +55 °C)
T4 (- 60°C ... +70 °C)
Mounting instructions:
The Supply terminal 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.
Version: ALO 16 ; D1350155 Index: 01 Date: 06.2019
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