11
INM F300 rev 6
DRAFT - 09 July 2019
DRAFT - 09 July 2019
10 IECEx SAFETY INSTRUCTIONS
10 .1 Conditions of safe use
Ex nA IIC T4 Gc and Ex nA [ic] IIC T4 Gc
1. The apparatus is to be installed in an enclosure which maintains a minimum
ingress protection rating of IP54 and meets the enclosure requirements of IEC
60079-0, IEC 60079-11 and IEC 60079-15.
2. Provisions shall be made externally to the apparatus to prevent the rated input
being exceeded by transient disturbances of more than 140% of the rated voltage.
See footnote.
FISCO Ex ic IIC T4 Gc
1. The apparatus is to be installed in an enclosure which maintains a minimum
ingress protection rating of IP54 and meets the enclosure requirements of IEC
60079-0 and IEC 60079-11.
Note: All MTL fieldbus power supplies are designed to protect the fieldbus trunk from transient
disturbances on the DC power feed and will meet the requirements of maintaining transient
disturbances below 140% of the rated voltage.
