Siemens
SM 321 Digital Input 16x24V
6ES7 321-1BL00-0AA0
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Price Range: $120-200 | Professional quotation within 24 hours
Discontinued model, replaced by S7-1500 SM 521. Originally part of the Siemens product lineup, this unit has been officially discontinued as of 2019-01. We provide fully refurbished units with full warranty. Perfect for maintaining existing installations and ensuring operational continuity for legacy systems....
| Product Status | Discontinued |
|---|---|
| Discontinued Date | 2019-01 |
| Replacement Model | S7-1500 SM 521 |
| Warranty | 12-month refurbished warranty |
- Fully refurbished and tested
- Full warranty coverage
- Technical support available
- Compatible with existing systems
- Legacy system maintenance
- Industrial automation
- Spare parts inventory
- Machine upgrades