Siemens SM 322 Digital Output Module for SIMATIC S7-300

Description

The 6ES7322-1BH01-0AA0 is a robust digital output module from the Siemens SIMATIC S7-300 series. It features 16 optically isolated outputs, providing a safe and reliable way to control 24V DC actuators in industrial environments. This module is a standard component for expanding the capabilities of S7-300 PLCs and is known for its durability and ease of integration.

Specifications

• Product Type: Digital Output Module SM 322
• Number of Outputs: 16
• Output Voltage: 24V DC
• Output Current: 0.5 A per channel
• Isolation: Optical (Galvanic)
• Total Current of Outputs (per group): 4 A
• Cable Length (unshielded): max. 600 m
• Cable Length (shielded): max. 1000 m
• Power loss, typ.: 5.5 W

Label Info

• Manufacturer: Siemens
• Part Number: 6ES7322-1BH01-0AA0
• Serial Number: S C-R0P03945
• Hardware Revision: E-Stand 5

Application

This module is designed for controlling a wide range of DC loads in automation systems, including solenoid valves, contactors, motors, and indicator lamps. Its ATEX certification also allows for use in potentially hazardous environments (Zone 2).

Country of Origin

Made in Germany.

CO2 Impact

Choosing this pre-owned module over a new one saves approximately 8.0 kg of CO2. This is equivalent to charging a smartphone over 960 times.

Availability

This product is a part of a phased-out series but is available as a tested, refurbished spare part. Order now from PLC2Day for expert support and fast delivery.

FAQ

What is the significance of "E-Stand 5" on the label?

"E-Stand" refers to the hardware revision or "Engineering Stand" of the module. E-Stand 5 is a specific hardware version. When replacing a module, it's often important to match the E-Stand or use a newer one to ensure compatibility with your existing PLC program and system configuration.

Yes, this module has an ATEX certification: II 3 G EEx nA II T4. This means it is approved for use in ATEX Zone 2 environments, which are areas where an explosive atmosphere is not likely to occur in normal operation but, if it does, will persist for a short period only. Always consult your site safety engineer and the official product manual before installation.

The module's internal electronics are powered by the S7-300 backplane bus. However, the 24V DC for switching the output channels must be supplied externally to the module's terminals. This design provides galvanic isolation and separates the logic power from the load power for enhanced safety and stability.

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Friday, March 13, 2026