SIEMENS 6ES7321-1BH02-0AA0 Digital input SM 321:
IMATIC S7-300, Digital input SM 321, isolated, 16 DI, 24 V DC, 1x 20-pole.
The Siemens 6ES7 321-1BH02-0AA0 is a digital input module designed for the SIMATIC S7-300 PLC series, specializing in connecting standard switches and two-wire proximity switches (BERO) in industrial automation systems. It enables seamless integration of digital signals into PLC-based control architectures, ensuring reliable data acquisition for processes ranging from discrete manufacturing to continuous production.
Technical Specifications:
| Parameter |
Details |
| Product Type |
SM 321 Digital Input Module |
| Order Code |
6ES7 321-1BH02-0AA0 |
| Input Type |
16 × 24V DC digital inputs (sink/source configurable) |
| Isolation |
Optical isolation between inputs and PLC backplane |
| Power Supply |
24V DC via S7-300 backplane or external supply |
| Current Consumption |
≤ 120mA (from 24V supply) |
| Connector Type |
20-pin front connector (pre-wired or field-attachable) |
| Mounting |
DIN rail (EN 50022) or direct chassis mounting |
| Certifications |
CE, UL, RoHS-compliant (verify with supplier for specific compliance) |
| Software Compatibility |
STEP 7 (TIA Portal) for configuration and diagnostics |
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