Siemens SIPROCESS GA700, Operating Instructions Manual, Page: 191 / 224

Service and maintenance
9
9.1 Safety instructions
WARNING
Opening the field control unit in energized state
Danger of explosion in hazardous areas.
● Only open the device in a de-energized state.
● Check prior to startup that the cover, cover locks, and cable inlets are assembled in
accordance with the directives.
Exception: Devices having the type of protection "Intrinsic safety Ex i" may also be opened
in energized state in hazardous areas.
WARNING
Impermissible repair of explosion protected devices
Danger of explosion in hazardous areas.
● Repairs may only be carried out by personnel authorized by Siemens.
WARNING
Toxic gases
This device is designed for operation with slightly corrosive gases. Therefore, dangerous
substances may exit from the gas lines when they are opened.
Prevent gases from exiting prior to opening or removing the device, for example:
● Lock the gas inlets and gas outlets.
● Disconnect the gas lines from the device.
● Refer to the warning information in Chapter →Wiring (Page 47)
WARNING
Faults at the device
If you are unable to eliminate faults, place the device out of service and protect it against
inadvertent commissioning.
Field device
Operating Instructions, 05/2015, A5E35640463-02
79