AB罗克韦尔PLC模块1756-IA16I ¥10800.00 AB罗克韦尔PLC模块1756-HSC ¥6830.00 罗克韦尔AB模块1756-L81ES ¥43560.00 AB罗克韦尔PLC模块1756-CN2 ¥38630.00 AB罗克韦尔PLC模块1756-A4 ¥1580.00 AB罗克韦尔接线端子1756-TBSH ¥380.00