Installation Installing Modules
28
4.4.2 Notes on Disconnecting the Mains Supply
DANGER! Hazardous voltages inside the device!
The OpenCom 510 must be disconnected from the mains supply for the following
installation work:
■ Installation of the central control module
■ Installation of a power supply unit
If a 1-12 frame is being powered by two power supply units, it is de-energised by
unplugging both mains cables.
DANGER! Always unplug the mains cables of both power supply
units when installing the central control module or a po-
wer supply unit.
If you unplug the mains cable of the group 2 (B) power supply unit, the
OpenCom 510 will still be operational! However, only the modules supplied by the
group 1 (A) power supply unit, i.e. the central control module and the interface
cards in slots 1 - 6, will be functional.
If you unplug the mains cable of the group 1 (A) power supply unit, the
OpenCom 510 ceases to be operational. However, slots 7 - 12 (D) will still be sup-
plied with operating voltage. (Refer to the illustration OpenCom 510: 1-12 frame
slots on page 26 to determine the location of the modules specified in parentheses
above.)
The LEDs of each module indicate whether the respective module is operational.
For further information on LED indicators, refer to Modules starting on page 61.
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