Siemens 6ES7461-1BA00-0AA0 Interface

Centralized Connection for S7-400 Expansion Racks

The Siemens 6ES7461-1BA00-0AA0 provides an interface module for the SIMATIC S7-400 PLC system. This module connects the central rack to an expansion rack, extending the system’s I/O capacity. It transfers power and data between the racks via a dedicated cable. This design allows users to build larger and more flexible S7-400 configurations.

Key Technical Specifications

Parameter	Specification
Product Model	Siemens 6ES7461-1BA00-0AA0
Brand	Siemens
Category	PLC Interface Module
Product Family	SIMATIC S7-400
Function	Connects central rack to expansion rack
Cable Type	Dedicated interface cable (IM bus)
Maximum Cable Length	Up to 100 m (depending on configuration)
Power Supply	24 VDC (from backplane)
Current Consumption	250 mA (from backplane)
Operating Temperature	0°C to 60°C
Storage Temperature	-40°C to 70°C
Protection Class	IP20

System Expansion and Configuration

The interface module enables the S7-400 system to expand beyond a single rack. A user places this module in the central rack and a corresponding module (e.g., 6ES7461-1BA00-0AA0 or a slave variant) in the expansion rack. The interface cable connects the two modules. This setup allows for a physically larger system.

Physical Design and Installation

The Siemens 6ES7461-1BA00-0AA0 mounts into a standard S7-400 rack slot. It features a dedicated connector for the interface cable.

Application Suitability

This module is essential for building S7-400 systems with expansion racks. It provides the physical and electrical connection for remote I/O. It is a key component for large-scale automation projects.