Siemens SIMATIC S7-400 SM 421 digital input module, 24VDC, 16 digital input
Siemens SIMATIC S7-400 SM 421 digital input module, 24VDC, 32 digital input
Siemens SIMATIC S7-400 SM 421 digital input module, 24VDC, 16 digital input
Siemens SIMATIC S7-400 SM 421 digital input module, 24VDC, 16 digital input
Siemens SIMATIC S7-400 SM 421 digital input module, 24-60V, 16 digital input
Siemens SIMATIC S7-400 SM 421 digital input module, 24VDC, 32 digital input
Siemens SIMATIC S7-400 SM 421 digital input module, 24VDC, 32 digital input
Siemens SIMATIC S7-400 SM 421 digital input module, 120/230VDC/VAC, 16 digital input
Siemens SIMATIC S7-300 SM 321 Ex-Digital input modules, 24VDC, 4 digital input