Siemens 6ES7461-3AA01-0AA0: Remote Expansion Rack Receiver Module

Add remote I/O capacity to your S7-400 system reliably. The Siemens 6ES7461-3AA01-0AA0 (IM 461-3) is a receiver interface module. It installs into a remote expansion rack (ER) and connects back to the central controller rack via a paired IM 460-3 transmitter. This enables you to place I/O modules up to 102 meters away from the main CPU.

Detailed Technical Specifications

• Product Model: Siemens 6ES7461-3AA01-0AA0 (IM 461-3 Series).
• Module Function: Receiver Interface Module for remote expansion racks.
• Connection Type: For distributed coupling up to 102m, requires paired IM 460-3 transmitter.
• Communication Bus: Operates via the C-bus for comprehensive data transfer.
• Power Consumption: Draws max. 620 mA from the 5V backplane; max. power loss 3,100 mW.
• Required Accessory: Needs termination plug 6ES7461-3AA0-7AA1 for proper signal termination.
• Maximum Cable Run: 102.25 meters total from the first to the last interface module in a chain.

Installation & Hardware Details

• Mounting: Installs in the first slot of a remote S7-400 expansion rack.
• Connection: Connects to the central rack's IM 460-3 via a special interface cable.
• Termination: Must be used with the specified Siemens termination plug for stable operation.
• Module Dimensions: 25mm (W) x 290mm (H) x 280mm (D).
• Module Weight: Approximately 620 grams.

Packaging & Service Information

• Package includes the IM 461-3 receiver module. The termination plug is typically sold separately.
• This product is supplied as a key component for system expansion projects.
• We ensure reliable delivery worldwide using carriers like FedEx, UPS, and DHL.

Expert FAQs for System Designers

• What is the difference between the C-bus and the P-bus in this context?
  The IM 461-3 extends the C-bus (communication bus), which carries parameter data and enables communication with intelligent modules (like CPs or FMs) in the remote rack. Some other interface modules only extend the I/O bus (P-bus).
• Can I mix different I/O modules in a rack with an IM 461-3?
  Yes. Because it extends the full C-bus, you can use standard digital/analog I/O as well as more complex communication (CP) or function (FM) modules in the remote rack.
• How many remote racks can I connect with one IM 460-3/IM 461-3 pair?
  Typically, this pairing creates a point-to-point link to one single expansion rack. For multiple remote racks in a chain, different interface modules (like IM 460-4/IM 461-4) are used.
• Why is the specific termination plug so important?
  The termination plug provides the correct electrical impedance at the end of the communication line. Without it, signal reflections occur, leading to data corruption and potential system failure.
• What cables are required for the interconnection?
  You must use the specific, shielded interface cables designed for the S7-400 remote rack system, such as the 6ES7 968-... series. Standard cables will not work correctly.

© 2025 Ubest Automation Limited. All rights reserved.
Original Source: https://www.ubestplc.com/
Contact: sales@ubestplc.com Phone: +86 180 3000 5825