MTL5544、MTL5544D双通道4-20安全栅，模拟量安全栅，4-20输入输出，适用于变送器，4-20x从现场传输到PLC等。：,MTL5510；MTL5510B；MTL5511；MTL5513；MTL5514；MTL5514D；MTL5516C；MTL5517；MTL5521；MTL5522；MTL5523；MTL5523V；MTL5523VL；MTL5524；MTL5525；MTL5526；MTL5531；MTL5532；MTL5533；MTL5541；MTL5541AS