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6ES7 221-1BH32-0XB0

Siemens S7-200 SMART Digital Input Module
*(Model: 6ES7 221-1BH32-0XB0)*

16-channel 24V DC digital input

Sink/source compatible

500V optical isolation

Configurable filtering (0.2-12.8ms)

Compact design (71×80×62mm, IP20)

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Siemens SIMATIC S7-200 SMART Digital Input Module
Order Number: 6ES7 221-1BH32-0XB0

General Features
Module Type: 16-channel digital input (DI)

Compatibility: S7-200 SMART PLC series

Input Type: Sink/source (24V DC)

Isolation: Optical isolation (500V AC)

Electrical Specifications
Input Voltage:

"1" signal: 15–30V DC

"0" signal: 0–5V DC

Input Current:

Typical: 3mA @ 24V DC

Filter Time: 0.2–12.8ms (configurable in groups of 4)

Max. Switching Frequency: 1kHz

Mechanical & Environmental
Connection: Removable screw terminal block

Dimensions (W×H×D): 71 × 80 × 62 mm

Weight: ~200g

Protection Class: IP20 (for enclosure mounting)

Operating Temperature: 0 to 55°C

Humidity: 95% RH (non-condensing)

Certifications
CE, UL, cUL

EMC: Complies with EN 61000-6-4

Typical Applications
Machine control (sensors, push buttons)

Process automation

Small-scale industrial systems