Siemens 3RK2200-2CE00-2AA2

The Siemens 3RK2200-2CE00-2AA2 is a specialized AS-Interface (AS-i) SlimLine Compact Module. It is part of the SIRIUS family of networking components, designed to connect standard digital sensors and actuators to an AS-i fieldbus network in a space-saving DIN-rail format.

This specific module is an S22.5 digital I/O module, meaning it has a slim 22.5 mm width, making it ideal for crowded electrical cabinets.

1. Key Technical Specifications

The “2CE00” designation defines the I/O configuration and the connection technology.

2. Connection and Wiring

The SlimLine Compact modules use a distinct terminal layout to separate the network communication from the field I/O.

• AS-i Bus Connection: The yellow AS-i flat cable (or round cable equivalent) connects to specific terminals to provide data and power for the internal electronics.

• External Power (AUX): Because this module has outputs, it typically requires an auxiliary 24V DC power supply (the black AS-i cable) to provide enough current for the actuators without overloading the AS-i bus.

• Terminals: The module features removable terminal blocks, which allow for “permanent wiring”—you can replace a faulty module without disconnecting every individual wire.

3. Addressing the Module

Before the module can communicate with a PLC (like an S7-1200 or S7-1500), it must be assigned an AS-i Address.

• Manual Addressing: You can set the address (1–31) using a handheld AS-i addressing device (like the 3RK1904 series) plugged into the addressing socket on the front of the module.

• Automatic Addressing: If the AS-i Master supports it, a new “empty” module (address 0) can be automatically addressed when replaced in an existing network.

4. Diagnostic LEDs

The front panel includes several LEDs that provide instant feedback on the health of the module: