3RK1100-1CQ20-0AA3 Siemens AS-i Compact Module

3RK1100-1CQ20-0AA3 occupies the field-device side of a Siemens AS-i installation, providing a compact way to place digital output points closer to the machinery being controlled.

Its K45 format is intended for distributed installation rather than conventional control-cabinet I/O. The module provides four digital outputs, uses M12 connections, and carries an IP67 enclosure rating for field installation. Siemens identifies it as a standard AS-i slave within its IP67 K45 digital I/O range.

Field-Level Role

 

The module can be viewed as an output node between the AS-i network and connected field devices.

 

Network Position	Role
AS-i Network	Transfers control information
Compact Module	Provides local output points
M12 Connections	Interface with field wiring
Connected Actuators	Receive switching signals

 

This arrangement keeps short field connections close to the machine while the communication network carries the control information.

 

The four output channels are organized as individual digital points.

The module therefore suits distributed switching tasks where several 24 V DC loads need to be addressed from a compact field station.

A significant part of the product identity is its K45 field-module construction.

The required mounting plate is ordered separately; Siemens specifies 3RK1901-2EA00 or 3RK1901-2DA00 for this module.

The product belongs to the Siemens AS-i compact-module family rather than being a conventional cabinet-mounted digital output card.

This makes the model particularly identifiable by its 4DQ-only configuration: there are no digital input channels on this particular variant.

The four M12 sockets provide the individual output interfaces.

The manufacturer documentation identifies pin 4 of the corresponding sockets for these output assignments.

 

 

Field Wiring Perspective

Rather than bringing every actuator connection back into a central cabinet, the compact module provides a local connection point.

 

A typical arrangement can be represented as:

 

AS-i network → 3RK1100-1CQ20-0AA3 → M12 field connections → 24 V DC loads

 

This is the main distinction between this product and a conventional PLC output card installed inside a control enclosure.

The IP67 construction makes the module suitable for field-level installation where protection against dust and water ingress is required.

The module uses M12 screw-type connections for its I/O interfaces. Its mounting arrangement is based on the K45 compact-module format, with the mounting plate specified separately by Siemens.

For replacement records, the mounting hardware should therefore be checked alongside the module itself.

The 3RK1100-1CQ20-0AA3 can be relevant to automation equipment where distributed digital output points are required.

Typical equipment relationships include:

• machine-mounted actuators;
• distributed field stations;
• automated production machinery;
• AS-i-connected equipment;
• 24 V DC switching loads.

The module's role is specifically on the digital output side of the field network.

For an existing AS-i installation, the complete 3RK1100-1CQ20-0AA3 reference should be retained in the equipment record.

Useful inventory fields include:

This is particularly useful when several K45 modules with similar housings are installed within the same machine.

The 3RK1100-1CQ20-0AA3 Siemens AS-i Compact Module is available for industrial automation spare-part procurement, AS-i field-network maintenance, distributed I/O replacement, and machine equipment refurbishment.

Contact our sales team for availability and quotation requests.

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