ZEISS
2 Safety | 2.5 Safety Devices and Interlocks
2.5.4.1 Main Switch
If the Emergency Off Circuit is installed, the Main Switch of the EMO Circuit shall be used as
Main
Disconnect Device
for the microscope and its components.
In its OFF position the Main Switch cuts off both phases of the mains power from the microscope
and all devices directly connected to the EMO Circuit.
The Main Switch can be locked in the OFF position to keep it from being switched on, e.g. during
repair and maintenance work.
The Main Switch is located at the front of the EMO Circuit.
The Main Switch of the external EMO box guarantees an ampere interrupting capacity (AIC) of at
least 10,000 A rms.
Fig. 5: Main Switch
2.5.4.2 Start Button
The green Start button is located at the front of the EMO Circuit below the Main Switch.
The Start button must be pushed to switch the mains power to the outputs of the EMO Circuit if
the Main Switch is in the ON position and no EMO button is pressed.
Fig. 6: Start button
Instruction Manual ZEISS SIGMA series | en-US | Rev. 7 | 352102-9344-006
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