6ES7221-1BH32-0XB0 | SIEMENS SIMATIC S7-1200, Digital Input SM 1221, 16 DI, 24 V DC, Sink/Source: Amazon.com: Industrial & Scientific
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Siemens SM 1221 DC – 6ES7221-1BH32-0XB0 – JC Automatización & Control
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Siemens SIMATIC S7-1200 SM 1221 DIO, 24VDC, 130mA, 16I | SIMATIC S7-1200 PLC DIO Modules
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Siemens Simatic 6ES7221-1BF32-0XB0 S7-1200 Digital input SM 1221 8 DI 24 V DC Sink/Source - PLCCable.com - Automation Supplies and PLC Tools
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