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Siemens RVB4
RVB4 Very old SIGMA controller. Replacement unit is RVL480. It is recommended that the Key data to replacement product: unit is completely rewired with Key data to replacement product: field devices to suit the application. (see Data Sheet)
Replacement: RVL480
Please check the technical data of the replacement product exactly, a 1: 1 replacement is not always possible.
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RVB4
SIGMA controller
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