Datasheet

Hazardous location Switches
Maintenance and Inspection
EU2B switches should be installed in an appropriate control box.
Maintenance and Inspection Method
Perform daily or periodical maintenance and inspection for items such as damage and temperature rise of the EU2B switches listed in the
Maintenance and Inspection table below.
Maintenance and Inspection
Inspection Items Inspection Method Inspections Measures
Enclosure base Visual
No rusting
No damages
Cleaning
Rust-resistant treat-
ment
Tightening bolt,
screws
Visual, tactile
No loosening
No rusting
Tightening
Cleaning
Packings Visual
No cracks
No apparent deformation
Replacement
Connecting parts Visual, tactile
No loosening of screws
No dirt on insulation materials
Tightening
Cleaning
Temperature rise
Thermometer,
tactile
Surface temperature 80ºC
max.
Investigate the cause
Disposal
Observe laws and regulations set by each country concerning refuse disposal.
Safety Precautions
Use EU2B switches that are applicable for use in hazardous areas (potentially explosive atmosphere where explosive gas or vapor may
exist), otherwise explosion or fire hazard may result.
• EU2B switches can be installed only in zones 1 and 2. Do not use in zone 0.
• Turn power off to the EU2B switches before installation, removal, wiring, or maintenance, otherwise explosion, fire hazard, or electric
shock may result.
• Do not disassemble, repair, or modify, otherwise damage or accident may result.
• Do not use damaged EU2B switches, otherwise damage or accident may result.
• When connecting external devices, make sure that each cable is connected to the correct terminal, otherwise electric shock, fire haz-
ard, or explosion may result.
• Use wires of a proper size to meet voltage and current requirements. Incorrect wiring may cause abnormal temperature rise and lead
to fire hazard and explosion.
• Connect the grounding terminal to a proper ground, otherwise electric shock, fire hazard, or explosion may result.
• Operate the EU2B switches at the rated current and voltage specified in this catalog, otherwise short-circuiting, fire hazard, or explo-
sion may result.
• Stop operation immediately if abnormal operation occurs. Otherwise, a secondary accident may occur.
Operating Instructions
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D-068