Siemens Simatic PC Panel PC 870 - Manual (Page 66)

General Information Release 11/02
5–2 SIMATIC Panel PC 670/870 Start-Up Instructions
FM approval
Note
Not all unit configurations have an FM approval.
If the unit has been awarded the FM approval, the following symbol appears on the
rating plate:
Complying with Factory Mutual Approval Standard Class Number 3611 Hazardous
(classified) Locations Class I, Division 2, Group A, B, C, D and Class I, Zone 2,
Group II C.
Warning
Personal injury and equipment damage can occur.
Personal injury and equipment damage can occur in hazardous areas if a plug
connection is disconnected from the operating unit while the system is running.
In hazardous areas, always switch off the power supply to the operating unit before
disconnecting plugs.
WARNING:
DO NOT DISCONNECT WHILE CIRCUIT IS LIVE
UNLESS LOCATION IS KNOWN TO BE NONHAZARDOUS.