A320飞机维护手册 AMM LIGHTS 灯光1(57)_航空信息_民用航空_通用航空

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Truth Table
R 1EFF : 001-049, 051-099, 101-149, 401-499, 1 33-21-00Page 41 1 1 Aug 01/05 1 1 1CES 1

R **ON A/C 151-199, 201-299,
The forward attendant panel 120RH and the aft attendant panel 126RH are connected to the Directors 101RH and 102RH of the Cabin Intercommunication Data System (CIDS). The input signals from the forward attendant panel 120RH and the aft attendant panel 126RH are processed by the director and transmitted to the Decoder/Encoder Units (DEUs). The DEUs accept the input data and activate the output to the fluorescent lamps with ballast units in accordance with the code presented at the input. The DEU is capable of handling up to four fluorescent lamps with ballast units. Three signal lines connect each fluorescsent lamp with ballast unit to the related DEU. The truth table below shows the state of the fluorescent lamps when activated by the DEU output signal. The DEU output signal has two levels 0 (0VDC) and 1 (28VDC). As can be seen in the truth table with no output signal from the associated DEU the fluorescent lamps will illuminate at full brightness.
Truth Table

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| | BALLAST UNIT INPUT PIN. | | LAMP STATE | SIGNAL | | |--------------------------------------------| | | F | D | E | |-----------------------------|---------------|---------------|------------| | BRT | 0 | 0 | 0 | |-----------------------------|---------------|---------------|------------| | DIM 1 (50 %) | 0 | 1 | 0 | |-----------------------------|---------------|---------------|------------| | DIM 2 (10 %) | 0 | 0 | 1 | |-----------------------------|---------------|---------------|------------| | OFF | 1 | 0 | 0 | --------------------------------------------------------------------------
The assignment of the fluorescent lamps with ballast units to cabin zones is programmed into the Cabin Assignment Module (CAM). The CAM is fitted in the programming and test panel 110RH and preprogrammed for particular lighting requirements. Any new requirements can be programmed into the CAM.
**ON A/C 301-399,
The Flight Attendant Panel (FAP) 120RH and the Additional Attendant Panel (AAP) 126RH are connected to the Directors 101RH and 102RH of the Cabin Intercommunication Data System (CIDS). The input signals from the FAP 120RH and the AAP 126RH are processed by the director and transmitted to the Decoder/Encoder Units (DEUs). The DEUs accept the input data and activate the output to the fluorescent lamps with ballast units in accordance with the code presented at the input. The DEU is capable of handling up to four fluorescent lamps with ballast units. Three signal lines connect each fluorescsent lamp with ballast unit to the related DEU. The truth table below shows the state of the fluorescent lamps when activated by the DEU output signal. The DEU output signal has two levels 0 (0VDC) and 1 (28VDC). As can be seen in the truth table with no output signal from the associated DEU the fluorescent lamps will illuminate at full brightness.
Truth Table