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Mounting an SAT145 module with SBT4D terminal board Prevent the terminal board from being influenced by the ambient temperature in order to keep the reference junction compensation accuracy, as detailed conditions are shown below. The reference junction compensation accuracy is specified when the ambient temperature is stable. When the temperature fluctuates, the accuracy may vary until it becomes stable. Mounting a terminal board by itself Install all the heat sources above the terminal board or terminal board wiring. Provide a heat shield in case installation of the heat sources below or sideway of the terminal board is unavoidable. Installing terminal board in a cabinet Install all the heat sources above the terminal board or terminal board wiring when those are mounted in a cabinet. Provide a heat shield in case installation of the heat sources below or sideway of the terminal board is unavoidable

NODE UNIT MOUNTING RESTRICTIONS (FOR AMBIENT TEMPERATURE MORE THAN 60 °C) When SNB10D safety node unit and S2SC70-F/SSC60-F/SSC50-F safety control unit for wide range temperature type are used in the ambient temperature of more than 60 °C, available channel of I/O module, maximum load current, external power supply voltage, and mounting location are also restricted as shown below, in addition to the power supply capacity. There are two types I/O module available - “ISA Standard G3 and temperature” type and “ISA Standard G3 and high-density installation” type. For example, the maximum of eight modules can be mounted on a safety node unit for ISA Standard G3 and high-density installation type and four for ISA Standard G3 and temperature type per unit. ISA Standard G3 and high-density installation type improves the installation efficiency. l For ISA Standard G3 and High-density Installation Type By selecting the ISA Standard G3 and high-density installation type listed on the Table “Coefficients of Module (high-density installation type)”, I/O module can be installed side by side without leaving an empty slot. SAI143-S3, SAI533-H3, ALR121-S3 and ALE111-S3 allow usages of ISA Standard G3 and temperature type in the same situation as ISA Standard G3 and high-density installation type. Do not mixedly install I/O modules other than listed on the Table “Coefficients of Module (high-density installation type)” on the same node unit. If different types of modules are mounted together, apply the installation conditions of the ISA Standard G3 and temperature type. Power supply capacity limitation When ISA Standard G3 and high-density installation type is used at the ambient temperature of more than 60 °C, make sure that Σ (coefficient A) + Σ (coefficient B), Σ (coefficient A) and Σ (coefficient B) must fall within the value shown on the Table “Power Supply Capacity Limitation (high-density installation type)”.