- Programmable Logic Controller (PLC), SIEMENS PLC Systems
Siemens Simatic S7 400 Digital Output Module 6ES74221BL000AA0
- 6ES74221BL000AA0 Siemens SIMATIC S7-400, SM 422 DIGITAL OUTPUT MODULE, OPTIC. ISOLATED, 32 DO, 24V DC, 0.5A 6ES7422-1BL00-0AA0
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