Signal Board 4 DI 5V

Siemens 6ES7221-3AD30-0XB0 is a digital input signal board designed for use with SIMATIC S7-1200 programmable logic controllers. It provides four high-speed, current-sourcing digital input channels, ideal for expanding digital sensing capabilities directly on the CPU.

Key Features

• Type: Signal Board SB 1221, Digital Input (DI)

• Number of Inputs: 4

• Input Type: 5 V DC, current-sourcing

• Input Voltage:

  • Rated Value: 5 V DC

  • Signal "0": 0 to 1 V

  • Signal "1": 2 to 6 V

• Input Current:

  • Signal "0": Max. 3 mA (permissible quiescent current)

  • Signal "1": Min. 6 mA

• Input Characteristic: IEC 61131, Type 1

• Switching Frequency: Up to 200 kHz

• Input Delay: Parameterizable for standard inputs

• Power Supply:

  • From backplane bus: 5 V DC, typical 50 mA

  • Supply current to transmitters: Max. 4 mA per channel

• Power Loss: Typical 1 W

• Mounting: Installs directly into the front of the S7-1200 CPU

• Protection: IP20

• Operating Temperature: Up to 40°C for all inputs simultaneously; otherwise, standard S7-1200 operating range applies

• Storage Temperature: -40°C to +70°C

• Relative Humidity: Up to 95% at 25°C (non-condensing)

• Dimensions: 38 mm (width) × 62 mm (height) × 21 mm (depth)

• Weight: Approx. 40 g