Need more information?
Siemens 6ES7221-1BH32-0XB0
Siemens S7-1200 Digital Input Module 16DI 24VDC
Product Description
The Siemens S7-1200 Digital Input Module (SM 1221) is designed to enhance the functionality of your S7-1200 PLC system. This module provides 16 digital inputs with a 24V DC sink/source configuration, making it ideal for a wide range of industrial automation applications. It ensures precise and reliable signal processing, conforming to IEC 61131 Type 1 standards.
With a compact design, the SM 1221 module features a robust plastic enclosure, ensuring durability and protection with an IP20 rating. The module supports a wide operating temperature range from -20°C to 60°C, making it suitable for various industrial environments. Additionally, it offers diagnostic capabilities with LED indicators for input status, ensuring easy monitoring and maintenance.
The module is equipped with potential separation between channels in groups of four, enhancing safety and reliability. It supports a maximum cable length of 500 meters for shielded cables and 300 meters for unshielded cables, providing flexibility in installation. The input delay is parameterizable, allowing customization to meet specific application requirements.
Compliant with international standards, the SM 1221 module holds approvals from CE, CSA, UL, cULus, FM, RCM, KC, and Marine. It also meets the ecological footprint requirements with an environmental product declaration and global warming potential metrics.
Applications: This digital input module is perfect for use in manufacturing, process control, and other industrial...
Need more information?
Offer details
- Offer from:
Trusted supplier — Romania, member since 2023, 1–4 employees - Availability:
- On requestLead time: 21 days
- Warranty:
- Not specified
- Condition:
- New Surplus
Specifications
- Brand
- Siemens
- Rated value (DC)
- 24 V
- Permissible range, lower limit (DC)
- 20.4 V
- Permissible range, upper limit (DC)
- 28.8 V
- From backplane bus 5 V DC, max.
- 130 mA
- From load voltage L+ (without load), max.
- 4 mA per channel
- Power loss, typ.
- 2.5 W
Available Offers
(32)| Condition | Availability | Supplier | Warranty | Action | |
|---|---|---|---|---|---|
| Condition New Surplus | Availability On requestLead time: 21 days | SupplierRomaniaTrusted supplier — member since 2023, 1–4 employees | Warranty Not specified | |
 | Condition New Factory Sealed | Availability 4 pcs. Updated at: 31-10-2025In-Stock | Supplier United KingdomTrusted supplier — member since 2021 | Warranty Not specified | |
| Condition New Surplus | Availability 2 pcs. Updated at: 15-09-2026In-Stock | Supplier GermanyTrusted supplier — member since 2024 | Warranty 24 months | |
| Condition Refurbished | Availability 20 pcs. Updated at: 15-09-2026In-Stock | SupplierGermanyTrusted supplier — member since 2024 | Warranty 24 months | |
| Condition New Surplus | Availability 5 pcs. Updated at: 16-09-2026In-Stock | SupplierUnited KingdomTrusted supplier — member since 2023 | Warranty 12 months | |
 | Condition New Factory Sealed | Availability 19 pcs. Updated at: 16-09-2026In-Stock | Supplier United StatesTrusted supplier — member since 2023 | Warranty 12 months |
Offer with manufacturer lead time
Directly from the manufacturer - with a confirmed, predictable, and fully transparent delivery time.
Documents
Data Sheet
Datasheet for Siemens 6ES7221-1BH32-0XB0, including specifications and features.
CAD Models
3D CAD model and technical drawings, ready for your design software.
Product data updated: 22-08-2026
Market insights for 6ES7221-1BH32-0XB0
Get real-time analytics and market data for 6ES7221-1BH32-0XB0 and other products from the PLC Modules & Extensions category to optimize your purchasing decisions
- Real-time stock availability data from 700 MRO distributors in Europe and USA
- Price analysis by condition (new, used, refurbished) with market median prices
- Critical component availability monitoring to prevent production downtime