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The unit is an associated equipment according to IEC/EN 60079-11.

The unit is not suitable for separating signals in power measurement technology.

The unit transmits binary signals of NAMUR sensors or mechanical contacts from
the hazardous area into the non-hazardous area.

u

Only use the unit within the permissible operating conditions.

u

Only use the unit stationary.

3.1 Classification

Use in hazardous areas according to the classification

II 3 (1) G 

(group II, category 1G / 2G, apparatus for gas atmosphere).

The requirements of the standards EN IEC 60079-0:2018, EN 60079-11:2012, 
EN 60079-15:2010 are met.

II (1) D

 (group II, category 1D, apparatus for dust atmosphere).

The requirements of the standards EN IEC 60079-0:2018 and EN 60079-11:2012
are met.

3.2 ATEX certificate

FIDI 20 ATEX 0022X

3.3 IECEx certificate

IECEx FIDI 20.0003X

3.4 Identification

ATEX classification

Identification

 II 3 (1) G

Ex nA [ia Ga] IIC T4 Gc

 II (1) D

[Ex ia Da] IIIC

 I (M1)

[Ex ia Ma] I

4 Installation

u

Do not install a damaged or dirty unit.

u

Do not expose the unit to mechanical hazard, 
Recommendation: Installation in a secondary housing.

Summary of Contents for N0537A

Page 1: ...Operating instructions Switching amplifiers N0537A N0538A N0539A 80299364 00 02 2021 GB...

Page 2: ...x certificate 4 3 4 Identification 4 4 Installation 4 4 1 Requirements for cables and connection cables 5 4 2 Requirements in case of use as associated equipment 5 4 3 Requirements for use with equipm...

Page 3: ...the corresponding applications and environmental conditions without any restrictions Only use the product for its intended purpose Intended use If the operating instructions or the technical data are...

Page 4: ...G group II category 1G 2G apparatus for gas atmosphere The requirements of the standards EN IEC 60079 0 2018 EN 60079 11 2012 EN 60079 15 2010 are met II 1 D group II category 1D apparatus for dust at...

Page 5: ...The permissible wire cross section must be adhered to In case multi wire conductors are used they have to be crimped with wire end ferrules u Make sure only one conductor per connecting terminal is u...

Page 6: ...ved proof of intrinsic safety 4 3 Requirements for use with equipment protection level Gc The unit may only be installed and operated if installed in a secondary housing that complies with the require...

Page 7: ...1 3 6 2 5 4 1 LED yellow Indication of the switching status output 1 output 2 lights when the corresponding output is switched the relay is en ergised 2 LED red Fault indication for input circuit 1 in...

Page 8: ...is always active S3 must be in position I When mechanical switches are connected the following applies Monitoring active for input circuit no 1 S3 must be in position I Without short circuit monitorin...

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