About

The Siemens 6ES7322-1BH01-0AA0 is a digital input module designed for the SIMATIC S7-300 series of programmable logic controllers (PLCs). It is used to interface with binary input devices such as sensors, switches, and other types of digital field equipment, converting their on/off signals into data that the PLC can process and use in automation tasks.

Key Features of the 6ES7322-1BH01-0AA0 (Digital Input Module):

• Digital Inputs: The module provides 16 digital input channels, allowing the PLC to receive binary signals (on/off) from a variety of digital field devices, such as pushbuttons, limit switches, or proximity sensors.

• 24V DC Input Voltage: It operates with 24V DC input signals, which is the standard voltage for digital inputs in industrial automation systems.

• Fast Switching Time: The module is designed to provide fast response times, which is essential in high-speed applications where quick detection and processing of input signals are required.

• LED Status Indicators: Each input channel has an LED indicator to show whether the channel is active or not. This feature is useful for diagnostics and troubleshooting, as it helps quickly identify input status or faults.

• Wide Voltage Range: The module supports a wide input voltage range within the 24V DC standard, ensuring compatibility with a broad range of field devices.

• Modular Integration: It is part of the S7-300 modular I/O system, offering the flexibility to be integrated with other modules to build scalable, customized automation systems.

• Diagnostic Features: The module includes diagnostic capabilities that help monitor the health of the inputs and detect faults in the system, improving system reliability and ease of maintenance.

• Configuration via Step 7: The 6ES7322-1BH01-0AA0 module can be configured and programmed using Siemens Step 7 engineering software, making it easy to integrate into a larger automation project and system. 

Siemens SIMATIC S7-300

Digital Output Module: SM 322, Isolated, 16 DO, 24 V DC, 0.5 A

Article No: 6ES7322-1BH01-0AA0
Total Current: 4 A per group (8 A per module)
Connection: 1x 20-pin front connector

Supply Voltage

• Rated value (L+): 24 V DC

• Permissible range: 20.4 – 28.8 V

• Current consumption:

  • From load voltage (without load): max. 80 mA

  • From backplane bus 5 V DC: max. 80 mA

Power Loss

• Typical: 4.9 W

Digital Outputs

• Number of outputs: 16

• Short-circuit protection: Yes, electronic (typical response threshold: 1 A)

• Limitation of inductive shutdown voltage: -53 V

• Controlling a digital input: Yes

Switching Capacity & Load Range:

• Lamp load max: 5 W

• Load resistance: 48 Ω – 4 kΩ

• Output voltage ("1"): min. L+ - 0.8 V

• Output current ("1"): 0.5 A rated

  • Permissible range 0–40 °C: 5 mA – 0.6 A

  • Permissible range 40–60 °C: 5 mA – 0.6 A

• Residual current ("0"): max. 0.5 mA

Output Delay (resistive load):

• "0" → "1": max. 100 μs

• "1" → "0": max. 500 μs

Parallel Switching:

• Uprating: No

• Redundant control: Yes

Switching Frequency:

• Resistive load: max. 100 Hz

• Inductive load: max. 0.5 Hz

• Lamp load: max. 10 Hz

Total Current per Group:

• Horizontal installation:

  • Up to 40 °C: max. 4 A

  • Up to 60 °C: max. 3 A

• Vertical installation:

  • Up to 40 °C: max. 2 A

Cable Length

• Shielded: max. 1,000 m

• Unshielded: max. 600 m

Diagnostics / Status

• Alarms / Diagnostics function: No

• LEDs: Status indicator digital output (green)

Potential Separation & Isolation

• Between channels: Yes, in groups of 8

• Channels ↔ Backplane bus: Yes (optocoupler)

• Isolation tested: 500 V DC

Dimensions & Weight

• Width: 40 mm

• Height: 125 mm

• Depth: 120 mm

• Weight: 190 g

Technical Details