| Product Type | S7-1200 Digital Expansion |
| Product Model | 6ES7223-1BH32-0XB0 |
| Supply Voltage Type | DC |
| Product Dimensions | 45 MM × 100 MM × 75 MM |
| Power Supply Voltage | Rated value (DC) 24 V Allowable range, lower limit (DC) 20.4 V Allowable range, upper limit (DC) 28.8 V |
| Weight | 210 g |
Digital I/O Module for S7-1200 Series: Model SM 1223 8DI/8DO, designed for the SIMATIC S7-1200 PLC system, integrates 8 digital inputs + 8 digital outputs in one module—ideal for automation applications requiring balanced discrete control.
8-Channel Digital Inputs (24V DC): Accepts standard 24V DC signals with support for both sink (NPN) and source (PNP) wiring, enabling flexible connection to pushbuttons, limit switches, photoelectric sensors, and other field devices.
8-Channel Digital Outputs (Transistor, 24V DC): Features high-speed PNP (source-type) transistor outputs with fast response and long service life, suitable for controlling relays, indicator lights, small solenoids, and other low-power loads.
Channel-Level Diagnostics: Each I/O channel includes an LED status indicator; supports diagnostic functions such as open-circuit detection for faster troubleshooting and reduced downtime.
High Channel Density & Compact Design: Integrates 16 I/O points in a standard S7-1200 module size, saving panel space and enabling compact, high-density installations.
Electrical Isolation: Inputs, outputs, and backplane bus are galvanically isolated, reducing electrical noise and improving system reliability in demanding environments.
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