6ES7321-1BL00-0AA0
Siemens Digital Input Module 6ES7321-1BL00-0AA0
Siemens
Siemens Digital Input Module 6ES7321-1BL00-0AA0
Home / PLC I-O Modules / Digital Input / 6ES7321-1BL00-0AA0 Need Siemens 6ES7321-1BL00-0AA0? Digital Input Module for SIMATIC S7-300 / ET 200M. Supplied with f…
Specifications
| Brand | Siemens |
|---|---|
| Model Number | 6ES7321-1BL00-0AA0 |
| Official Product Name | SIMATIC S7-300 SM 321 Digital Input Module, DI 32 x DC 24 V |
| Applicable System | SIMATIC S7-300 / ET 200M |
| Product Type | Digital Input Module (PLC I/O) |
| Equivalent Standard | Contact us for cross-reference and alternative models |
| Product Status | Active (Legacy S7-300) |
| Input characteristic | IEC 61131-2 Type 1 |
| Rated input voltage | 24 V DC (20.4 to 28.8 V DC) |
| Signal 1 voltage | 13 to 30 V |
| Typical input current | 7 mA (signal 1) |
| Isolation | Optocoupler, grouped 16 channels |
| Isolation test voltage | 500 V DC |
| Backplane bus current | max 15 mA (5 V DC) |
| Power loss | 6.5 W typical |
| Front connector | 40-pin (ordered separately) |
| Cable length | 600 m unshielded / 1000 m shielded |
| Dimensions (W x H x D) | 40 x 125 x 120 mm |
| Weight | approx 260 g |
| Number of inputs | 32 (24 V DC) |
Product Description
The 32 channels are grouped in two isolated banks of 16, separated from the backplane by optocouplers tested at 500 V DC, making it a high-density, reliable choice for centralized acquisition of sensor and switch signals in machine and process control. The Siemens 6ES7321-1BL00-0AA0 is an SM 321 digital input module for the SIMATIC S7-300 controller, providing 32 isolated 24 V DC inputs on a single 40-pin front connector.
Basic Product Information
- Optocoupler isolation in groups of 16 channels from the backplane
- Green LED status indicator per input channel
- Supports 2-wire sensors with up to 1.5 mA quiescent current
- Compatible with SIMATIC S7-300 central racks and ET 200M distributed I/O
- 32 high-density 24 V DC digital inputs on a single module
Technical Specifications
Version & Model Difference
['6AG1321-1BL00-2AA0: SIPLUS S7-300 variant for extended temperature range', 'SM 321 family also includes 8-channel and 16-channel DI modules', 'Diagnostic-enabled DI modules available separately for wire-break detection']
Application Scenarios
- Machine automation and control panels
- Acquisition of sensor and switch discrete signals
- Centralized high-density digital input in control cabinets
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Frequently Asked Questions
How many inputs does the 6ES7321-1BL00-0AA0 have?
It provides 32 digital inputs rated at 24 V DC.
Is the front connector included?
No, a 40-pin front connector must be ordered separately.
Does it provide channel-to-channel isolation?
Channels are isolated from the backplane and grouped in 16, but not individually isolated within a group.
Which systems is it compatible with?
It works on SIMATIC S7-300 central racks and on ET 200M distributed I/O via an IM 153.
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