
Inquiry for Siemens 6AG1221-1BH32-4XB0 SIPLUS Digital Input Module
This listing provides details for the Siemens 6AG1221-1BH32-4XB0 digital input module designed for harsh environments. Users may submit project requirements to initiate a technical review process.
Quick Facts
- Part number
- 6AG1221-1BH32-4XB0
- Brand
- Siemens
- Category
- I/O Modules
- Product type
- SIPLUS S7-1200 SM 1221 16DI, based on 6ES7221-1BH32-0XB0 with conformal coating, -20…+60 °C, 16 DI, 24 V DC, sink/source
- Lifecycle
- Active Product
- Dimensions
- 10.9 x 8.8 x 5.6 cm
- Net weight
- 0.21 Kg
- Source category
- SIPLUS SM 1221 digital input modules
Product Overview
The Siemens 6AG1221-1BH32-4XB0 is a digital input module within the SIPLUS S7-1200 series. It features conformal coating for enhanced protection against environmental factors. Review Siemens 6AG1221-1BH32-4XB0 as io modules with source category SIPLUS SM 1221 digital input modules, recorded lifecycle Active Product, and submitted model identity.
This module supports sixteen discrete inputs operating at 24 V DC. The design accommodates both sink and source current configurations for flexible wiring options.
Technical Review Notes
- Base hardware derives from the 6ES7221-1BH32-0XB0 standard module configuration. Keep dimensions 10.9 x 8.8 x 5.6 cm and net weight 0.21 Kg unchanged while comparing project documents and product image evidence.
- Conformal coating provides additional protection against moisture and corrosive agents.
- Operating temperature range extends from minus twenty to plus sixty degrees Celsius.
- Module accepts sixteen digital input signals with consistent electrical characteristics.
- Input voltage specification requires a stable 24 V DC power supply source.
- Current sinking and sourcing capabilities allow versatile connection to various sensors.
Model Identification
- Part number 6AG1221-1BH32-4XB0 identifies the specific SIPLUS variant clearly. Use the source path Automation technology / SIPLUS digital modules / SIPLUS SM 1221 digital input modules to confirm catalog context, model family, parameter review scope, and technical inquiry preparation notes.
- The prefix indicates integration within the Siemens SIMATIC S7-1200 automation family.
- Suffix characters denote the extended environmental rating compared to standard versions.
- Reference documentation lists this model under SIPLUS digital modules category.
Technical Parameters
| Product type | SIPLUS S7-1200 SM 1221 16DI, based on 6ES7221-1BH32-0XB0 with conformal coating, -20…+60 °C, 16 DI, 24 V DC, sink/source |
|---|---|
| Lifecycle | Active Product |
| Dimensions | 10.9 x 8.8 x 5.6 cm |
| Net weight | 0.21 Kg |
| Source category | SIPLUS SM 1221 digital input modules |
Parameters are factual source fields retained for model review.
Parameter Review
- Physical dimensions are recorded as ten point nine by eight point eight centimeters. Check product-owned images, label text, connector area, and submitted model references against the exact 6AG1221-1BH32-4XB0 record before publication.
- Depth measurement is noted at five point six centimeters for rack mounting.
- Net weight is specified at zero point two one kilograms for logistics.
- Lifecycle status is listed as Active Product for ongoing project planning.
- Electrical isolation properties are inherent to the digital input circuit design.
Catalog Classification
Image & Label Review
- Product images typically display the front terminal block interface layout. Review Siemens 6AG1221-1BH32-4XB0 as io modules with source category SIPLUS SM 1221 digital input modules, recorded lifecycle Active Product, and submitted model identity.
- Labeling on the module face includes the full type designation code.
- Side views may show the DIN rail clip mechanism for installation.
- Internal structure photos often highlight the conformal coating application details.
Product Image Gallery

Inquiry Preparation
- Verify the required number of digital inputs for your control panel. Keep dimensions 10.9 x 8.8 x 5.6 cm and net weight 0.21 Kg unchanged while comparing project documents and product image evidence.
- Confirm the ambient temperature conditions match the extended operating range.
- Check if sink or source input logic aligns with sensor types.
- Ensure 24 V DC power supply stability meets module specifications.
Category Context
This component belongs to the broader I/O modules classification group. Use the source path Automation technology / SIPLUS digital modules / SIPLUS SM 1221 digital input modules to confirm catalog context, model family, parameter review scope, and technical inquiry preparation notes.
It falls specifically under SIPLUS digital modules for rugged applications.
Related items include other SIPLUS S7-1200 expansion interface components.
Review Notes
- Cross-reference the base model 6ES7221-1BH32-0XB0 for standard feature comparisons. Check product-owned images, label text, connector area, and submitted model references against the exact 6AG1221-1BH32-4XB0 record before publication.
- Evaluate the necessity of conformal coating for your specific installation site.
- Assess the thermal management requirements given the wider temperature tolerance.
- Document all technical queries before submitting the formal inquiry request.



