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Signal Module

Signal Module

Product Details

SIMATIC S7-400 Signal Module

Module Overview


The signal module is the interface through which the controller performs process operations. Many different digital and analog modules provide accurate input/output according to the requirements of each task. Digital and analog modules differ in terms of channel count, voltage and current range, electrical isolation, diagnostics, and alarm functions. The S7-400 signal module can be expanded not only in the central rack but also via the PROFIBUS DP to the S7-400 central controller. Hot swapping is supported, which makes replacing modules extremely simple.

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Design and function

Easy to install

Connect the sensor/execute through the front connector Device. After replacing the module, simply insert the front connector into the new module of the same type and retain the original wiring. The front connector has an automatic coding function to avoid errors. The S7-400 can also detect if the front connector is plugged in.

Quick Connect

The SIMATIC TOP connection makes connecting easier and faster. Pre-assembled front connectors with a single cable core and a complete plug-in modular system with front connector modules, connecting cables and terminal boxes are available.

High Packing Density

The number of channels in the module enables space-saving design. For example, you can use modules with 16 to 32 digital channels and 8 to 16 analog channels.

Simple parameter settings

Configure and parameterize these modules with STEP 7 and do not require inconvenient conversion settings. The data is stored centrally. If the module is replaced, the data is automatically transferred to the new module to avoid any setup errors. No software upgrades are required when using the new module. Configuration information can be copied as needed, for example for standard machines.

Diagnostics, Interruptions

Many modules also monitor signal acquisition (diagnostics) and signals that are passed back from the process (process interrupts, such as edge detection). This immediately reacts to errors that occur during the process (such as wire breaks or short circuits) and any process events (such as rising or falling edges on digital inputs). The response of the controller can be easily programmed using STEP 7. On a digital input module, each module can trigger multiple interrupts.