3RK2400-1BQ20-0AA3

What type of industrial automation component is this?

It is an AS-Interface compact digital I/O module from the Siemens K45 range. It is designed for field-level automation applications and provides 2 digital inputs and 2 digital outputs in a compact IP67-rated housing.

What is the module typically used for?

This module is typically used to connect field devices such as sensors and actuators to an AS-Interface network. Its compact design makes it suitable for distributed I/O layouts on machinery, conveyors, production cells and other industrial control systems.

How many digital inputs and outputs does it have?

The module provides 2 digital inputs and 2 digital outputs. The inputs are suitable for PNP transistor signals, while the outputs are PNP transistor switching outputs.

What operating voltage does the AS-Interface connection require?

The AS-Interface operating voltage range is 26.5 to 31.6 V DC, according to the AS-Interface specification.

Does the output circuit need an additional power supply?

Yes. The output circuits require an external AUX POWER supply of 20 to 30 V DC. The external supply should comply with PELV protection class III requirements.

What current rating do the outputs provide?

Each digital output is rated at 2 A for a signal state of 1. The maximum aggregate current for all outputs is 3 A.

What type of connections are used for the inputs and outputs?

The module uses 4 M12 screw-type I/O sockets with standard pin assignment, making it suitable for common industrial sensor and actuator cabling.

Is it suitable for harsh field environments?

Yes. The module has an IP67 protection rating and is designed for field operation. It can operate in ambient temperatures from -25 °C to +85 °C.

How are the inputs powered?

The sensor supply is provided via AS-Interface. It has an input voltage range of 16.5 to 30 V DC and is short-circuit and overload resistant.

What is the maximum current available for sensor supply?

The sensor supply can provide up to 200 mA for all inputs at an ambient temperature of 40 °C.

What indication LEDs are fitted?

The module includes a yellow LED for I/O status, a green LED for Uaux status and a green/red dual LED for AS-Interface diagnostics.

What are the physical dimensions?

The module measures 45 mm wide, 80 mm high and 30 mm deep, making it a compact option for distributed I/O installations.

How is the module mounted?

It can be mounted on a standard rail or wall using a suitable K45 compact module mounting plate. Compatible mounting plates include Siemens 3RK1901-2EA00 and 3RK1901-2DA00.

What does A/B slave mean in this context?

A/B slave refers to the AS-Interface addressing format that allows two compatible slaves to share one standard AS-i address position as A and B devices, helping increase the number of nodes that can be used on a network.

What protection features are built into the outputs?

The outputs include built-in short-circuit protection, induction protection and watchdog functionality. This helps protect the output channels during normal industrial operation.

What is the data bit assignment?

Socket 1 is assigned to IN3 on D2, socket 2 is assigned to IN4 on D3, socket 3 is assigned to OUT1 on D0 and socket 4 is assigned to OUT2 on D1.

What input switching level is required for a high signal?

The minimum high switching level for the digital inputs is 10 V DC. The input current is at least 6 mA for signal 1 and no more than 1.5 mA for signal 0.

Does it include polarity reversal protection?

Yes. The AS-Interface connection has built-in polarity reversal protection.