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SIEMEN 6ES7221-1BH22-0XA8 SIMATIC S7-200 CN Input Digital EM 221
SIEMEN 6ES7212-1BB23-0XB0 SIMATIC S7-200, CPU 222 Unit padat, bekalan kuasa AC 8 DI DC/6 DO geganti 4 KB progr./2 KB data, PROFIBUS DP boleh dikembangkan
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