Cfmus - Special Conditions - Beckhoff EtherCAT EK112 Series Manual

Mounting and wiring
5.2.4

cFMus - Special conditions

Observe the special conditions for the intended use of Beckhoff fieldbus components in
potentially explosive areas!
• The equipment shall be installed within an enclosure that provides a minimum ingress protection of IP54
in accordance with ANSI/UL 60079-0 (US) or CSA C22.2 No. 60079-0 (Canada).
• The equipment shall only be used in an area of at least pollution degree 2, as defined in IEC 60664-1.
• Transient protection shall be provided that is set at a level not exceeding 140% of the peak rated voltage
value at the supply terminals to the equipment.
• The circuits shall be limited to overvoltage Category II as defined in IEC 60664-1.
• The Fieldbus Components may only be removed or inserted when the system supply and the field
supply are switched off, or when the location is known to be non-hazardous.
• The Fieldbus Components may only be disconnected or connected when the system supply is switched
off, or when the location is known to be non-hazardous.
Standards
The fundamental health and safety requirements are fulfilled by compliance with the following standards:
M20US0111X (US):
• FM Class 3600:2018
• FM Class 3611:2018
• FM Class 3810:2018
• ANSI/UL 121201:2019
• ANSI/ISA 61010-1:2012
• ANSI/UL 60079-0:2020
• ANSI/UL 60079-7:2017
FM20CA0053X (Canada):
• CAN/CSA C22.2 No. 213-17:2017
• CSA C22.2 No. 60079-0:2019
• CAN/CSA C22.2 No. 60079-7:2016
• CAN/CSA C22.2 No.61010-1:2012
Marking
Beckhoff fieldbus components that are certified in accordance with cFMus for use in areas subject to an
explosion hazard bear the following markings:
FM20US0111X (US):
FM20CA0053X (Canada):
62
WARNING
Class I, Division 2, Groups A, B, C, D
Class I, Zone 2, AEx ec IIC T4 Gc
Class I, Division 2, Groups A, B, C, D
Ex ec T4 Gc
Version: 3.6 EK112x, EK15xx