.S7-200SMART CPU 订货号产品选型或方案确认需求需要结合工艺、应用场合等因素综合考虑,最终方案或订货号请与西门子销售或经销商确认。本文列出的订货号仅供参考,不能作为最终订货依据!表1. S7-200SMART CPU 订货号CPU型号规格订货号CPU SR20AC/DC/继电器6ES7 288-1SR20-0AA0CPU ST20DC/DC/DC6ES7 288-1ST20-0AA0CPU CR20sAC/DC/继电器6ES7 288-1CR20-0AA1CPU SR30AC/DC/继电器6ES7 288-1SR30-0AA0CPU ST30DC/DC/DC6ES7 288-1ST30-0AA0CPU CR30sAC/DC/继电器6ES7 288-1CR30-0AA1CPU ST40DC/DC/DC6ES7 288-1ST40-0AA0CPU SR40AC/DC/继电器6ES7 288-1SR40-0AA0CPU CR40 (1)AC/DC/继电