PLC | SIMATIC S7-300| Siemens | 6ES7322-1BH01-0AA0 6ES7 322-1BH01-0AA0 SM 322 digital output modules

Product Description: Siemens 6ES7322-1BH01-0AA0

The Siemens 6ES7322-1BH01-0AA0 is a digital output signal module from the SIMATIC S7-300 series, designed to interface PLCs with external actuators via relay outputs. This module offers 8 channels of digital relay outputs, enabling flexible switching of electrical loads such as contactors, lamps, or valves. It is ideal for industrial control applications requiring galvanic isolation and rugged relay-based switching.

Key Features

• 8 digital outputs with relay contacts
• Electrically isolated channels for safe switching
• Suitable for AC or DC load control
• Long mechanical and electrical life of relay contacts
• Compatible with all standard S7-300 racks
• Diagnostic LED indicators for each channel
• Easy installation and wiring

Technical Specifications

• Part Number: 6ES7322-1BH01-0AA0
• Output Type: Relay
• Number of Outputs: 8
• Switching Voltage: 5 V to 250 V AC / 5 V to 30 V DC
• Switching Current (max): 2 A per channel
• Switching Frequency: 10 Hz (AC), 1 Hz (DC, inductive)
• Isolation: Opto-isolated between channels and system
• Power Supply: Via backplane bus
• Dimensions (W × H × D): 40 mm × 125 mm × 120 mm
• Mounting: DIN rail (S7-300 standard rack)
• Operating Temperature: 0 °C to +60 °C
• Storage Temperature: –40 °C to +70 °C
• Protection Class: IP20
• Weight: Approx. 300 g

Application Areas

• Industrial machinery control with AC or DC actuators
• Automation systems requiring isolated relay switching
• Lighting and motor control systems
• Process automation in manufacturing and infrastructure sectors
• Environments requiring robust and flexible relay-based outputs

Advantages

• Supports high-voltage and inductive load switching
• Provides electrical isolation between load and control logic
• Reduces wiring complexity with built-in terminal connections
• Proven compatibility with SIMATIC S7-300 PLC platform
• Increases system flexibility with relay contact versatility