Aastra OpenCom 510 User Guide - Page 30
Notes on Disconnecting the Mains Supply, Always unplug the mains cables of both power supply
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Installation Installing Modules 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 power 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 supplied 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 65. 28