Siemens SM 322 (6ES7 322-1BH01-0AA0) – SIMATIC S7-300 Digital Output Module (16 DO)

Siemens SM 322 (6ES7 322-1BH01-0AA0) – SIMATIC S7-300 Digital Output Module (16 DO)

The Siemens SM 322 (Part No. 6ES7 322-1BH01-0AA0) is a standard Digital Output Module for the modular SIMATIC S7-300 and ET 200M PLC systems. This transistor-based module provides 16 separate 24 V DC outputs, enabling the PLC to reliably switch power to field actuators such as solenoid valves and signal lamps. Its design features electronic short-circuit protection and electrical isolation, ensuring safe and compact control of peripheral devices.

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Quick Navigation

• About This Digital Output Module
• Applications
• Why ROMA Industrial Company
• Technical Specifications
• Key Features & Benefits

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About This Digital Output Module

This product is a Digital Output Module, often referred to as a **PLC Output Card** or **SM 322**, which serves as the interface between the digital commands of the PLC and the electrical power control of field actuators. The module features 16 channels that switch a 24 V DC signal with a maximum output current of 0.5 A per channel. Key safety features include **electronic short-circuit protection** on every output and **electrical isolation** between channels and the PLC backplane, enhancing system reliability and safety in industrial environments.

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Applications

This digital output module is suitable for switching and controlling various field actuators and signal devices in industrial control systems, including:

• Solenoid Valves (Pneumatic and Hydraulic Control)
• DC Contactor and Relay Coils
• Signal Lamps and Indicator Lights
• Low-Current Motor Starters
• General Binary Actuator Control in Manufacturing

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Why ROMA Industrial Company

ROMA Industrial is your trusted partner for a full range of industrial supplies across categories like Motion Control & Mechatronics, Electrical & Automation, and Fluid Power & Control. We are committed to providing top-tier products and service to keep your operations running smoothly. We partner with world-class shipping providers like FedEx, DHL, and UPS to ensure fast and reliable delivery worldwide. We accept returns to fulfill your satisfaction and accept variable payments methods including PayPal, credit cards, and more. We are a supplier in Europe, USA, and Saudi Arabia.

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Technical Specifications

• Manufacturer: Siemens
• Part Number: 6ES7 322-1BH01-0AA0
• Model Number: SM 322
• Product Type: Digital Output Module
• Number of Channels: 16 Digital Outputs
• Output Voltage (Rated): 24 V DC
• Output Current: 0.5 A per channel
• Total Current per Module: Max. 8 A
• Protection: Electronic short-circuit protection (per channel)
• Isolation: Electrically Isolated (between channels/backplane and groups)
• Output Delay: Max. 100 µs (“0” to “1”)
• Series: SIMATIC S7-300 / ET 200M
• Hazardous Location: Approved for Class I, Div 2 and Zone 2
• Weight: N/A

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Key Features & Benefits

• High Channel Density: Provides 16 digital outputs in a single module, optimizing PLC rack space.
• Channel Protection: Electronic short-circuit protection on every output enhances safety and system reliability.
• Transistor Outputs: Provides fast switching speed for precise control of field actuators.
• Electrical Isolation: Isolation ensures the protection of the PLC’s backplane from field disturbances.