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6ES7421-1FH20-0AA0 / 6ES74211FH200AA0 Category:PLCs, Power Supplies & I/Os Manufacturer:SIMATIC S7-400 Group:SIEMENS Automation 6ES7960-1AA06-0XA0 SIMATIC S7-400H, SYNC SUBMODULE V6 $437.00/PCS IN ...