6ES7221-1BH32-0XB0

Product Overview

The 6ES7221-1BH32-0XB0 is a SIMATIC S7‑1200 digital input module SM 1221 with 16 digital inputs (24V DC, sink/source), grouped in 4 channels per group, and type 1 input characteristic per IEC 61131.

Supply Voltage

• Rated Value: 24V DC
• Permissible Range: 20.4V to 28.8V DC

Input Current

• from Backplane Bus (5V DC, max): 130 mA
• from Load Voltage L+ (without load, max per channel): 4 mA

Power Loss

• Power Loss (typ): 2.5 W

Digital Inputs

• Number: 16 (in groups of 4)
• Input Characteristic: Type 1 per IEC 61131
• Simultaneously Controllable Inputs (max): 16 (all mounting positions)

Input Voltage

• Rated Value: 24V DC
• Signal "0": 5V DC at 1 mA
• Signal "1": 15V DC at 2.5 mA

Input Current

• Signal "0" (max quiescent current): 1 mA
• Signal "1" (min): 2.5 mA
• Signal "1" (typ): 4 mA

Ambient Conditions

• Operating Temperature: –20°C to +60°C
• Permissible Temperature Change: 5°C to 55°C, 3°C/min
• Storage/Transport Temperature: –40°C to +70°C
• Relative Humidity (at 25°C, non‑condensing): 95% max

Connection Method

• Required Front Connector: Yes

Physical Specifications

• Enclosure Material: Plastic
• Width: 45 mm
• Height: 100 mm
• Depth: 75 mm
• Weight: approx. 210 g

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