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OVERVIEW
Official designation: Siemens 6ES7 321-1BH02-0AA0 (SM 321, Digital Input Module)
Role/Application: Isolated 16-channel digital input module for SIMATIC S7-300 PLCs, designed for the secure acquisition of 24 V DC signals from switches and 2-/3-/4-wire proximity switches (BEROs).
KEY SPECS SUMMARY
Power: 24 V DC (20.4 to 28.8 V DC)
Interfaces / Ports: 20-pole front connector
Indicators: Green LED per channel for status
Operating Temp: Refer to the latest manufacturer manual.
Platform / Compatibility: SIMATIC S7-300 / ET 200M
Limit: Max unshielded cable length 600 meters
Lifecycle: Product phase-out announced (PM300: Active Product)
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What is the typical input current required for a signal one state?
A: The typical input current for a signal one state is 7 mA.
Wiring & Installation:
Q: What is the maximum quiescent current permissible for a connected 2-wire sensor?
A: The maximum permissible quiescent current for a 2-wire sensor is 1.5 mA.
Troubleshooting & Compatibility:
Q: Does the digital input module 6ES7 321-1BH02-0AA0 support hardware interrupts or diagnostics alarms?
A: No, this module does not support hardware interrupts or diagnostic alarms.
Replacement & Upgrades:
Q: What is the final announced product cancellation date for the 6ES7 321-1BH02-0AA0?
A: The final product cancellation date is announced as October 1, 2025.
상품 정보 고시
| Category | Details |
|---|---|
| Product Name | See this page for details |
| Model Name | See this page for details |
| Certification or Licensing Information Required by Law | See this page for details |
| Country of Manufacture or Origin | See this page for details |
| Manufacturer | See this page for details |
| After-sales Service Contact or Customer Support Number | See this page for details |
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