Product information
Overview
Key Features
- Digital input capacity: Has 16 digital inputs, arranged in groups of 4.
- 24 V DC input signals: Rated input voltage is 24 V DC; signal "0" is 5 V DC or 0.5 mA, and signal "1" is 15 V DC at 2.5 mA.
- Selectable input delays: Standard inputs have parameterizable delays of 0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in groups of four.
- Cable length limits: Maximum cable length is 500 m for shielded cables and 300 m for unshielded cables.
- Diagnostics and protection: Has input-status and maintenance LEDs, IP20 protection, and 707 V DC potential separation between the channels and backplane bus (type test).
Technical Summary
| Product type designation | SM 1221, DI 16x 24 V DC |
|---|---|
| Digital inputs | 16 |
| Input grouping | In groups of 4 |
| Rated input voltage | 24 V |
| Input type | Sink/source |
| Input delay | 0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in groups of four |
| Power loss | 3.2 W, typ. |
| Protection | IP20 |
Frequently Asked Questions
What is the exact product type of 6ES7221-1BH50-0XB0?
It has the product type designation SM 1221, DI 16x 24 V DC.
How many digital inputs does this module have?
It has 16 digital inputs in groups of 4.
What input voltage and signal levels are supported?
The rated input voltage is 24 V DC. Signal "0" is 5 V DC or 0.5 mA, while signal "1" is 15 V DC at 2.5 mA.
What cable lengths are supported?
The maximum cable length is 500 m with shielded cable and 300 m with unshielded cable.
What information should I include for a quotation request?
Please provide the required quantity, destination and project-list context for quotation review.
