101211131514X130SO1SO2161817SO3GUID-C5B5FD1C-617B-4F38-A0D4-D98735E69530 V1 ENFigure 23: Signal output in BIO00063.11 RTD/mA inputs3.11.1 FunctionalityRTD and mA analog input module is used for monitoring and metering milli-ampere (mA), temperature (°C) and resistance (Ω). Each input can be linearlyscaled for various applications, for example, transformer’s tap changer positionindication. Each input has independent limit value supervision and deadbandsupervision functions, including warning and alarm signals.3.11.2 Operation principleAll the inputs of the module are independent RTD and mA channels withindividual protection, reference and optical isolation for each input, making themgalvanically isolated from each other and from the rest of the module. However,the RTD inputs share a common ground.3.11.2.1 Selection of input signal typeThe function module inputs accept current or resistance type signals. The inputs areconfigured for a particular type of input type by the channel specific Input modesetting. The default value for all inputs is “Not in use”, which means that thechannel is not sampled at all, and the output value quality is set accordingly.Section 3 1YHT530004D05 DBasic functions86 615 seriesTechnical Manual
