Siemens 6ES7321-1BH02-0AA0 S7-300 SM 321 16-Input Module

Key specifications

Series: SIMATIC S7-300 SM 321
Input isolation: 16 inputs share one isolated group; no channel-to-channel isolation; optocoupler isolation from backplane bus
Dimensions: 40 × 125 × 120 mm (W × H × D)
Power loss: 3.5 W typical
Digital inputs: 16

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Product name	Siemens 6ES7321-1BH02-0AA0 S7-300 SM 321 16-Input Module
Brand	Siemens
Model	6ES7321-1BH02-0AA0
Category	Industrial Automation Parts
Series	SIMATIC S7-300 SM 321
Input isolation	16 inputs share one isolated group; no channel-to-channel isolation; optocoupler isolation from backplane bus
Dimensions	40 × 125 × 120 mm (W × H × D)
Power loss	3.5 W typical
Digital inputs	16
Input delay	1.2–4.8 ms for both 0→1 and 1→0 transitions at rated input voltage; not parameterizable
Product type	Digital input module
Input voltage	24 V DC
Front connector	1 × 20-pole
Load voltage L+	20.4–28.8 V DC (L+); rated 24 V DC
Input signal levels	Signal 0: −30 to +5 V; signal 1: 13–30 V