Product Overview
When your SIMATIC S7-1200 system requires additional digital input and output capacity, the Siemens 6ES7223-1BH32-0XB0 provides a directly integrated solution. This Digital I/O SM 1223 module delivers 8 digital inputs (24 V DC, sink/source) and 8 digital outputs (transistor, 0.5 A) in a compact form factor. Designed for seamless expansion, it allows you to upgrade existing installations without redesigning control cabinets.
Technical Specifications
The Siemens 6ES7223-1BH32-0XB0 offers precise electrical characteristics for reliable operation in industrial environments. Key parameters include:
| Parameter |
Value |
| Product type designation |
SM 1223, DI 8x24 V DC, DQ 8x24 V DC |
| Supply voltage rated value (DC) |
24 V |
| Permissible voltage range (DC) |
20.4 V to 28.8 V |
| Input current from backplane bus |
max. 145 mA at 5 V DC |
| Power loss |
typ. 2.5 W |
| Digital inputs |
8 (in groups of 2) |
| Input voltage rated value (DC) |
24 V |
| Input delay (parameterizable) |
0.2 ms to 12.8 ms, selectable in groups of four |
| Digital outputs |
8 (in groups of 1) |
| Output current rated value |
0.5 A per channel |
| Short-circuit protection |
No (must be provided externally) |
| Diagnostic alarm |
Yes |
| CE mark, CSA, UL, cULus, FM, RCM, KC, Marine approval |
Yes |
| IP degree of protection |
IP20 |
| Dimensions (W x H x D) |
45 mm x 100 mm x 75 mm |
| Weight |
approx. 210 g |
Industry Applications
The Siemens 6ES7223-1BH32-0XB0 is ideal for upgrading or expanding existing S7-1200 systems in manufacturing, packaging, and material handling. For example, in a production line where additional sensors and actuators are needed, this module adds eight fast inputs for proximity sensors and eight transistor outputs for solenoid valves or indicators. The parameterizable input delay allows tuning to match sensor response times, reducing false triggers.
Installation & Setup Guidance
Mount the 6ES7223-1BH32-0XB0 directly onto the S7-1200 rail and connect via the backplane bus. A front connector (required – not included) facilitates wiring. Because the module lacks internal short-circuit protection, install external fuses or current-limiting devices on the output channels. Follow the manual for correct wiring of sink/source inputs. Use shielded cables up to 500 m for inputs and 500 m for outputs (unshielded up to 300 m for inputs, 150 m for outputs) to maintain signal integrity.
Selection Guide & Purchasing Advice
Before purchasing the 6ES7223-1BH32-0XB0, verify your S7-1200 CPU compatibility and the required front connector part number. For a reliable source of genuine Siemens automation spares, consider ubest101. Ensure your control cabinet has adequate space (45 mm width) and backplane power budget (max 145 mA at 5 V). This module is a cost-effective way to add 16 digital I/O points to your system without replacing existing hardware.