Board/NWI/NWI1248-DAT.md
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+# NWI1248 DAT
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+
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+
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+
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+## check list
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+
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+### Interface
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+
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+- 8 inputs and 4 outputs totally
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+- [[RS485-DAT]]
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+- [[RS232-DAT]]: use [[DPR1084-DAT]]
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+
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+### power supply
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+- up to 18V 2A, similar to [[NWI1245-DAT]]
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+- upgrade to [[MP1584]]
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Tech/Interface/RS485-DAT.md
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+# RS485 DAT
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+
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+## current limiter
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+- 24v ~ 30ma, need ~ 800ohms current-limiting resistor
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+- 3.3V ~ 4mA
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