Digital | analog input modules for automation controllers
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Input modules are among the most important components of industrial and building automation. They ensure that controllers (PLC) can receive signals from sensors, switches, measuring devices, or other external sources and make decisions accordingly. Without input modules, it is impossible to connect signals to automated control systems.
The group includes digital input modules (DI) for “on/off” type signals, and analog input modules (AI), which transmit precise values of physical quantities such as temperature, pressure, or voltage.
Functions
Digital input modules (DI): capture two-state signals (e.g., switch open/closed, sensor active/inactive).
Analog input modules (AI): process continuously varying signals (e.g., 0–10 V, 4–20 mA) that reflect real measurements.
Signal isolation and filtering: protect the PLC from disturbances and false signals.
Integration with controllers: installed as PLC expansion modules, providing flexibility and customization of the system.
Applications
For engineers: production process control, energy and infrastructure management systems, data acquisition for analysis.
For electricians: easy installation in PLC cabinets, reliable transmission of signals from sensors to control equipment.
Transport sector, building automation, industrial production lines, laboratory equipment.
Pros
Flexibility – choice between digital and analog modules according to needs.
Reliability – high-quality module protection against disturbances and overloads.
Versatility – compatible with various sensors and industrial devices.
Accuracy – analog modules ensure precise measurement transmission to the PLC.
Easy integration – DIN rail mounting and direct connection to PLC.
Cons
Require compatibility with a specific PLC system (not always universal).
Analog inputs may require additional calibration.
Require certain technical knowledge for configuration and installation.
Digital and analog input modules are essential in every automated system, as they connect the real world with control technologies. They ensure that controllers can receive accurate signals and respond correctly to changing conditions. Whether it is simple home automation or a complex industrial line – input modules are a reliable bridge between sensors and control logic.
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Analog input module | 8 inputs | 24VDC | 6ES7231-4HF32-0XB0 SiemensCode: 6ES7231-4HF32-0XB0Price 41709 € VAT incl.(344 70 € VAT excl.)
Analog input module | 1xJ/K thermocouple | 24VDC | 6ES7231-5QA30-0XB0 SiemensCode: 6ES7231-5QA30-0XB0Price 12814 € VAT incl.(105 90 € VAT excl.)
Analog input module | 16 inputs | 24VDC | 6ES7531-7MH00-0AB0 SiemensCode: 6ES7531-7MH00-0AB0Price 43185 € VAT incl.(356 90 € VAT excl.)
Analog input module | 4 inputs | 24VDC | 6ES7134-6JD00-0CA1 SiemensCode: 6ES7134-6JD00-0CA1Price 23631 € VAT incl.(195 30 € VAT excl.)
Analog input module | 4 inputs | 24VDC | 6ES7134-6GD01-0BA1 SiemensCode: 6ES7134-6GD01-0BA1Price 17630 € VAT incl.(145 70 € VAT excl.)
Digital input module | 16 inputs | 24VDC | PNP | 6ES7131-6BH01-0BA0 SiemensCode: 6ES7131-6BH01-0BA0Price 8664 € VAT incl.(71 60 € VAT excl.)
