Audio Expander power consumption 7.6 Watt

DCN Next Generation 2.40 Release Notes

en 10

7 Release 1.12

7.1General

7.1.1Release Date

December 10th 2004

7.1.2Firmware/FPGA versions

Product	FPGA	SWA	SWB
LBB 4100	1.00	1.12.0769	2.11.1416
LBB 4112	--	1.3	--
LBB 4120	1.3	1.10.XXXX	--
LBB 4124	1.0	--	--
LBB 4402	--	1.12.0769	2.11.1416

7.1.3Compatibility restrictions

LBB 4120

1.0

7.2Errata

7.2.1Audio Expander: not possible to disable audio outputs using input contacts

In paragraph 10.3.5 of the Installation and User Instructions is described that the audio outputs 1 to 4 can be disabled by closing respectively control input 5 to 8. This function is not supported. However disabling audio inputs 1 to 4 by closing respectively control input 1 to 4 is supported.

7.2.2Audio Expander: power consumption 7.6 Watt

The power consumption of the LBB 4402/00 Audio Expander is 7.6 Watt instead of 5.6 Watt. Add power by using a Network Splitter (LBB 4410/00) with an external power supply in case the power is insufficient.

7.3Known limitations

7.3.1System: reset of units after connecting new units to a trunk

When a Channel Selector, Interpreter desk, Trunk Splitter, Tap-off unit or Extended power supply is connected to a trunk, which is connected to the LBB 4100 Central Control Unit, it can happen that all units in that same trunk reset. After reset the units come back to default settings. The units in the trunk will not reset if a unit is connected to a Tap-off outlet of a Tap-off unit.

If it is important that the channel selectors are not reset to default in above described situation: use the auto restore function of the channel selector.

See the Installation and User Instruction for how to set the auto restore function.

If it is important that you can connect and replace each unit during operation, without the above described reset behavior: power the units with the LBB 4106 Extension Power Supply Unit. The LBB 4106 Extension Power Supply Unit is less prone to the inrush current.

7.3.2System: noise during system start During system start up noise is heard for a maximum time of 30 seconds. The noise is heard from the headphones connected to the channel selectors and interpreter desks and the loudspeaker of the interpreter desks.

7.3.3Central Control Unit: fault contact closed despite system is ok

When the system is initialized for four times, the fault contact is activated, while the system works properly. Switch off the CCU in order to reset the fault contact.

7.3.4Audio Expander: not more than one input used for floor insertion

Undefined behavior occurs if more than one audio input is used for floor insertion per system. Use not more than one audio input for floor insertion.

Bosch Communications Systems 2007 March