AB罗克韦尔PLC模块1756-OF4 ¥19000.00 AB罗克韦尔PLC模块1756-IF8H ¥7300.00 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