Siemens SIMATIC S7-200 SMART Digital Input Module
Model: 6ES7221-1BH32-0XB0

Key Specifications:
Module Type: 16-channel digital input (DI)

Input Type: Sink/source (24V DC)

Input Voltage:

"1" Signal: 15–30V DC

"0" Signal: 0–5V DC

Input Current: 3 mA typical @ 24V DC

Isolation: 500V AC (channel-to-bus)

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

Electrical Characteristics:
Max. Switching Frequency: 1 kHz

Power Consumption: ≤1.5 W

Connection: Removable screw terminal block

Mechanical & Environmental:
Dimensions (W×H×D): 71 × 80 × 62 mm

Weight: ~200 g

Protection Class: IP20 (for enclosure mounting)

Operating Temperature: 0 to 55°C

Humidity: ≤95% RH (non-condensing)

Compatibility:
Compatible with: S7-200 SMART PLCs

LED Indicators: Per-channel status (green)

Certifications:
CE, UL, cUL

EMC: Complies with EN 61000-6-4

Key Features:
✔ High-density design (16 inputs in compact size)
✔ Configurable noise filtering
✔ Plug-and-play installation
✔ Diagnostics via LED indicators

Typical Applications:
Sensor and switch interfacing

Machine control systems

Small-scale automation

Short Description:
Siemens S7-200 SMART 16DI Module *(6ES7221-1BH32-0XB0)*

16×24V DC inputs (sink/source)

500V isolation, screw terminals

IP20, compact (71×80×62mm)
*Reliable digital input for S7-200 SMART PLCs.*