ALLEN-Bradley**继电器440R-D22R2
440R-D22R2:
Guardmaster双重输入安 全继电器(DI)、2双通道通用输入,1常开固态辅助输出.
Guardmaster Dual Input Safety Relay (DI), 2 Dual Channel Universal Inputs, 1 N.C. Solid State Auxiliary Outputs
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