PLC | Siemens | 6ES7326-1BK02-0AB0 6ES7 326-1BK02-0AB0 S7 Digital input SM 326

Product Description: Siemens 6ES7326-1BK02-0AB0

The Siemens 6ES7326-1BK02-0AB0 is an FM 326 function module designed for the SIMATIC S7-300 automation system. It provides two independent high-speed counter channels capable of counting at up to 1 MHz per channel. The FM 326 is ideal for applications requiring fast and precise counting, such as position detection, rotational speed monitoring, or pulse acquisition in high-speed automation processes. Configuration is performed via STEP 7, and the module integrates seamlessly into S7-300 systems.

Key Features

• Channels: 2 high-speed counter channels
• Counting Frequency: Up to 1 MHz per channel
• Input Types: Differential (RS422) or single-ended TTL
• Functions: Pulse counting, frequency measurement, period duration, edge evaluation
• Diagnostics: Integrated status and fault monitoring
• Configuration: Via STEP 7 engineering software
• Mounting: DIN rail installation within S7-300 rack

Technical Specifications

• System Series: SIMATIC S7-300
• Module Type: Function Module (FM 326)
• Number of Channels: 2
• Max. Counting Frequency: 1 MHz per channel
• Signal Inputs: RS422 differential or TTL
• Signal Evaluation Modes: Count, frequency, direction, etc.
• Diagnostics: Yes (channel-specific)
• Power Supply: Via backplane bus
• Dimensions (W × H × D): 40 mm × 125 mm × 120 mm
• Mounting Position: Vertical in S7-300 rack
• Operating Temperature Range: 0 °C to +60 °C
• Protection Class: IP20
• Certifications: CE, cULus, FM

Application Areas

• High-speed counting for encoders, sensors, and incremental signals
• Rotational speed and direction detection in machinery
• Position monitoring in packaging and assembly lines
• Time-critical signal acquisition in automation processes

Advantages

• High-speed and precise pulse counting with dual channels
• Flexible input types for industrial sensors
• Real-time diagnostics and monitoring
• Easy integration into S7-300 systems using STEP 7