Siemens Modules 6ES7321-1FH00-0AA0

The Siemens 6ES7321-1FH00-0AA0 module is a digital input module (SM 321) for the SIMATIC S7-300 PLC system, designed to read digital AC signals from various industrial field devices. 

Technical Spcification:

• Number of Digital Inputs: 16.
• Input Delay (max): 25 ms.
• Input current for signal “1” (typ.): approx. 6.5 mA (120 V, 60 Hz), 16 mA (230 V, 50 Hz).
• Dimensions (WxHxD): approx. 40 x 125 x 120 mm.
• Weight (approx.): 240 g.