Additional Requirements For Cables And Connection Lines; Surrounding Enclosure; Operation, Maintenance, Repair - Allen-Bradley 1719 Ex I/O User Manual

Surrounding Enclosure

Operation, Maintenance,
Repair

Additional Requirements for Cables and Connection Lines

Observe the following points when installing cables and connection lines:
• Observe the permissible core cross-section of the conductor.
• The insulation stripping length must be considered.
• When installing the conductors the insulation must reach up to the
terminal.
• If you use stranded conductor, crimp on wire end ferrules.
• Never pull the cable. A wire could become loose from the terminal and
protection against electric shock can no longer be ensured. Always pull the
terminal.
• Connectors for non-intrinsically safe circuits must be mechanically
secured.
• The non-intrinsically safe cables have to be fixed with cable ties at the
intended fixtures.
• Unused connection lines must be either connected to terminals or securely
tied down and isolated.
The device may only be installed and operated in Zone 2 or Class I, Div 2 if it has
been mounted in a surrounding enclosure with degree of protection IP54
according to IEC/EN 60529. The surrounding enclosure must correspond to
equipment protection level Gc.
The device may only be installed and operated in Zone 22 if mounted in a
surrounding enclosure, which corresponds to equipment protection level Dc.
To ensure the degree of protection:
• All seals must be undamaged and correctly fitted.
• All screws of the surrounding enclosure/surrounding enclosure cover must
be tightened with the appropriate torque.
• Only cable of the appropriate size must be used in the cable glands.
• All cable glands must be tightened with the appropriate torque.
• All unused cable glands must be sealed or plugged with corresponding
stopping plugs.
Observe IEC/EN 60079-17 for maintenance and inspection.
When energized, the surrounding enclosure may only be opened for maintenance
in Zone 2 or Class I, Div 2 if non-intrinsically safe circuit connections are
protected by a cover with a degree of protection IP30.
If the seal on the enclosure cover or a seal on the cable gland is damaged, the seal
must be replaced with a new seal provided by the manufacturer.
Rockwell Automation Publication 1719-UM001C-EN-E - August 2018
Safety Chapter 1
15