Siemens 6ES7223-1PL32-0XB0

This is a 16-point digital input/16-point transistor output hybrid expansion module for the S7-200 SMART series PLC. With its high density, high reliability, and fast transistor outputs, it has become a common and key component for expanding the I/O capabilities of the S7-200 SMART system.

Detailed Product Description

1. Product Role and Position

This module is an expansion module for the S7-200 SMART PLC series. It is used to extend the system’s digital signal handling capacity when the central controller (CPU) itself has insufficient I/O points. It mounts directly to the right of the CPU module and communicates rapidly with the CPU via its built-in connector.

2. Key Features and Parameters

Digital Input Section:

• Number of Channels: 16

• Type: Sink/Source (determined by common connection)

• Rated Input Voltage: 24 VDC

• Input Current: Typically 4 mA (at 24 VDC)

• Signal Level “1”: ≥ 15 VDC

• Signal Level “0”: ≤ 5 VDC

• Input Delay: Selectable (via hardware configuration)

  • 0.2 / 0.4 / 0.8 / 1.6 ms (for standard signals)

  • 3.2 / 6.4 / 12.8 ms (for filtering)

Digital Output Section:

• Number of Channels: 16

• Type: Transistor Output – This is a key characteristic of this model.

• Output Type: Sourcing

• Rated Output Voltage: 24 VDC

• Output Current per Point: 0.5 A

• Maximum Current per Common Group: 3 A (The module typically divides the 16 outputs into 2 groups of 8 points, each sharing one common).

• On-state Voltage Drop: Typically < 0.5 V

• Switching Frequency:

  • Resistive Load: Up to 1 kHz

  • Inductive Load: Up to 0.5 Hz

• Protection: Built-in overload and short-circuit protection.

3. Commons and Wiring

• Input Commons: The 16 input points are typically divided into 2 groups, with 8 inputs sharing one common (M).

• Output Commons: The 16 output points are similarly divided into 2 groups, with 8 outputs sharing one common (L+).

4. Power Requirements

• Internal Module Power (5VDC): Supplied by the S7-200 SMART CPU module or an external power supply module via the connector. This module consumes 105 mA at 5VDC.

• External Power (24VDC):

  • Input Point Power: An external 24VDC power supply is required for the input circuits.

  • Output Load Power: An external 24VDC power supply is required for the output loads (e.g., relays, indicators).

5. Status Indicators

• Each Input Point: Green LED, indicating the status (ON/OFF) of that input.

• Each Output Point: Green LED, indicating the status (ON/OFF) of that output.

• Module Status: “RUN” and “SF” LEDs display the module’s operating and fault status.

Advantages and Characteristics

• High Density: Integrates 32 I/O points (16 IN / 16 OUT) in one standard module, saving control cabinet space.

• High Performance: Transistor outputs offer fast response times and long life, suitable for applications requiring frequent switching (e.g., controlling solenoids, indicators, small relays).

• Flexibility: Inputs support both sink and source wiring; outputs are sourcing transistors, making it easy to connect to various sensors and actuators.

• Easy Installation and Debugging: Automatically recognized by the CPU, requiring no complex setup. Each point has a status LED for easy on-site debugging and diagnostics.

Typical Application Scenarios

This module is widely used in automation systems requiring a large number of digital signal controls, such as:

• Small packaging machines

• Conveyor control systems

• Material handling systems

• Assembly lines

• Textile machinery

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