| 摘要 |
The invention relates to an operating unit which can be illuminated and which is especially provided for a motor vehicle air conditioning system. Said operating unit is alone, due to the external connection of terminal contacts to the vehicle electric system voltage or ground (GND), suited for two different vehicle electric system voltages which have an integral correlation n, for example, 12 V and 24 V. For this, an even-numbered quantity n of light sources (21) or light source groups (23) are provided. In addition, n+1 terminal contacts are provided and are arranged such that the light sources (21) or light source groups (23) can be connected in parallel. Two interconnected light sources (21) are provided in said exemplary variants 24 V/12V. Three terminal contacts (22) are lead out from the operating unit. The center contact (22b) is connected to the vehicle electric system voltage when operating on the 12 V vehicle electric system, whereas the external terminal contacts are connected to the ground. The center contact (22b) remains unused when connected to the 24 V vehicle electric system. |
