High-performance SIMATIC S7-300 Digital Input Module (SM 321). It features 16 isolated digital inputs at 24V DC, designed for seamless integration with S7-300 PLC systems via a 20-pole front connector.
Backorder available · Factory lead time 2–3 weeks.
The Siemens 6ES7321-1BH02-0AA0 is a high-performance SIMATIC S7-300 SM 321 digital input module designed for reliable industrial automation systems. Featuring 16 isolated digital inputs, this module operates at 24 V DC and uses a 20-pole connector, ensuring stable signal acquisition and seamless integration into Siemens S7-300 PLC environments.
Built to meet Siemens’ stringent quality standards, this digital input module is ideal for applications requiring accurate input signal processing, electrical isolation, and long-term operational reliability.
Space-Efficient Design: Compact housing allows for high-density mounting on the S7-300 rail.
Galvanic Isolation: Protects the internal PLC circuitry from external voltage spikes and electrical noise.
Simple Integration: Fully compatible with standard STEP 7 and TIA Portal engineering environments.
Proven Reliability: Industrial-grade build quality ensures long-term operation in harsh manufacturing environments.
Reads and processes digital input signals from field devices
Supports 16 digital input channels at 24 V DC
Provides isolated inputs to prevent electrical interference
Integrates directly into SIMATIC S7-300 automation systems
Manufacturer: Siemens
Product Number: 6ES7321-1BH02-0AA0
Series: SIMATIC S7-300
Module Type: Digital Input SM 321
Number of Inputs: 16 DI
Input Voltage: 24 V DC
Isolation: Yes
Connector: 1 × 20-pole
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| SKU / Model | 6ES7321-1BH02-0AA0 |
|---|---|
| Product Condition | Brand New, New - Backlog, New - No Original Box, New - Original Box Opened, Used - Average, Used - Below Average, Used - Excellent, Used - Fairly Good, Used - Good, Used - Poor, Used - Very Good |
| Weight | 0.200 kg |
| Dimensions | 120 × 40 × 125 mm |
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