Siemens SIMATIC S7-1500 Communications module for serial connection, RS422/485 Part number 6ES7540-1AB01-0AA0

Product Overview

The Siemens 6ES7540-1AB01-0AA0 is a SIMATIC S7-1500 CM PtP RS422/485 BA communication module designed for serial point-to-point data transmission. It supports RS-422 and RS-485 interfaces for reliable long-distance communication and is suitable for connecting drives, controllers, and field devices in industrial automation networks. Compact and easy to integrate, this module provides dependable connectivity within the SIMATIC S7-1500 control system.

Key Features

• Point-to-point communication module for the SIMATIC S7-1500 system
• Supports RS-422 and RS-485 interfaces for industrial serial communication
• Compatible with communication protocols such as 3964(R), Freeport, and USS
• 15-pin D-sub interface for secure serial connections
• Supports cable lengths up to approximately 1200 meters (depending on configuration)
• Firmware version V2.0 with enhanced diagnostic functions and reliability
• Low power consumption and compact design for easy integration
• Mountable directly on standard 35 mm DIN rails with S7-1500 hardware

Technical Specifications

• Product Series: SIMATIC S7-1500 CM PtP RS422/485 BA
• Article Number: 6ES7540-1AB01-0AA0
• Interface Type: RS-422 and RS-485 serial communication
• Transmission Rate: Up to 19.2 kbit/s (BA version)
• Maximum Cable Length: Approx. 1200 m (RS-422/485)
• Supply Current: Approx. 43 mA (from backplane bus)
• Power Loss: Approx. 0.6 W
• Address Area (Inputs/Outputs): 8 bytes in standard mode, 32 bytes in performance mode
• Mounting Type: DIN rail (35 mm), plug-in module for S7-1500
• Dimensions (W × H × D): Approx. 35 mm × 147 mm × 129 mm
• Weight: Approx. 0.22 kg

Compliance & Certifications

• Designed and manufactured in compliance with Siemens SIMATIC S7-1500 automation standards
• Fully compatible with STEP 7 (TIA Portal) configuration environment
• Meets international standards for industrial serial communication modules

Applications

Ideal for point-to-point data communication in industrial automation environments. Commonly used to connect S7-1500 controllers to drives, sensors, field devices, or other PLCs using RS-422/RS-485 interfaces. Suitable for applications in machine automation, process control, logistics systems, and distributed I/O networks where stable and long-distance serial communication is required.