So that your machinery and systems will still be intact tomorrow.

For over 30 years, we've repaired and sold current and discontinued PLC modules from various manufacturers. Our knowledge encompasses the entire technology field, from CPU/central modules, analogue input and output modules, function, communication, digital input and output modules, motors and even power packs and power supply.

Reputable companies from various branches of the production industry have been among our regular customers for decades.

PLC business unit - BVS Industrie-Elektronik

BVS is the expert in repairing and selling PLC control and drive technology

S7 controls and operator panels
S7 controls and operator panels
S5 controls and HMIs

The most important industries in which PLC systems are used

  • pharmaceutical industry
  • logistics
  • chemical industry
  • wood processing / paper industry
  • food production
  • consumer goods production
  • glass, stone, soil, ceramic


  • plastic industry
  • electrical industry
  • automotive industry

and many more

Our product range

We offer products and replacement parts from internationally established brand-name manufacturers as well as proprietary brands in PLC technology and peripherals.

We have decades of experience with a range of manufacturers in repairing assemblies from major manufacturer brands for PLC control systems and drive technology, such as SIEMENS, Bosch Rexroth and Fanuc. We also maintain very close partnerships with manufacturers and are even an official “Service Point” of Bosch Rexroth, among other things.

For these brands, we offer a 24-month warranty* on all reconditioned modules as well as a wide range of additional services. Our repairs are always in compliance with the Machinery Directive, so that you can save money on an expensive retrofit and keep your machine tool the way it is.

But that’s not all: Upon request, we also offer functional repairs and procurement support along with cleaning and inspection for many other manufacturer brands in the “PLC control systems and drive technology” field.

Many other PLC manufacturers upon request


Allen Bradley

Mitsubishi Electric

and many more.

The world of PLC with Siemens as an example

We carry all relevant PLC control modules, programming devices and HMI Panels in the current and discontinued product series from our core competence brand, Siemens, in our range of products.

Siemens Example PLC - BVS Industrie-Elektronik


Example of schematic layout for a PLC/Profibus-controlled system with Siemens modules

Control technology

[Translate to English:] SPS-Steuerungstechnik

HMI modules

[Translate to English:] HMI-Baugruppen

IPCs/programming devices

[Translate to English:] IPCs-Programmiergeräte

Drive technology

[Translate to English:] Antriebstechnik

And for all HMI devices, we have unipo replacement devices.

Original: Siemens OP7
Replacement: unipo® UCP5
Original: Siemens OP25/27
Replacement: unipo® UCP250
Siemens Original        unipo replacement solution
OP5 / OP7   UCP-OP/7
OP15 / OP17   UCP-OP15/17
OP25 / OP27   UCP-OP25/27
OP35/ OP37   UCP-OP35/37
OP45   upon request
OP77   UCP-TD17
TD17 / TP37 / TP170B   UCP-TP27/170
TP27   UCP-250-TP37
MP270 / MP370   upon request

Our repair and sale services offer an adequate solution for every need

Your advantages

[Translate to English:] herstellerübergreifendes Portfolio - BVS Industrie-Elektronik

Warehouse for all manufacturers with well over 250.000 modules

[Translate to English:] Reparaturqualität auf Herstellerniveau  - BVS Industrie-Elektronik

Outstanding repair quality at the manufacturer level through partnerships or collaboration with the manufacturers

[Translate to English:] zugelassene Komponenten - BVS Industrie-Elektronik

Experience gained from analysing over 1,000,000 repairs

[Translate to English:] Reduktion von Maschinenausfällen und deren Folgekosten - BVS Industrie-Elektronik

Reduction of machine downtimes and the subsequent costs and therefore maximising machine availability

[Translate to English:] Maschinenrichtlinienkonforme Reparatur - BVS Industrie-Elektronik

Repairs in compliance with the Machinery Directive and certified to DIN EN ISO 9001:2015 and 14001:2015

[Translate to English:] Verwendung zugelassener Komponenten - BVS Industrie-Elektronik

Exclusive use of new components authorised by the manufacturer and legislator

Extensive test field including original test stands

[Translate to English:] Schnelle Lieferservices - BVS Industrie-Elektronik

Fast and reliable delivery services

Our promise of quality We take many different measures to ensure we live up to our promise of high quality. You can count on that.

We guarantee a consistently high level of quality. This is particularly beneficial for the repairs we complete, during which components approved by the manufacturer or legislator are used.

The detailed documentation of the fault patterns of the more than 1,000,000 successful repairs that we have completed to date, enables us to analyse, evaluate and resolve production-related weak points on electronic modules. During an reconditioned repair, we therefore do not just replace components that have become worn through age or use but also those components that have been identified as production-related weak points as part of these analyses.

Our entire company complies with the quality standards and quality directives as per DIN EN ISO 9001:2015 and the environmental management standard as per DIN EN ISO 14001:2015.

Our high level of quality guarantees the highest system availability and lowest maintenance costs over the entire life cycle of your machines and systems. We can guarantee this quality promise to you by continuously developing our expertise and measuring ourselves against the manufacturers' quality standards.

Based on this, we can offer our customers a 24-month warranty* on the complete assembly.

24 months Warranty - BVS Industrie-Elektronik
Our quality promise - Repair stations- BVS Industrie-Elektronik
State-of-the-art repair stations
Our quality promise - test stand - BVS Industrie-Elektronik
Extensive BVS test field, including original test stands.
[Translate to English:] DMSZ

Practical tip for forming:

Regular forming helps to prolong the service life of your modules. Fully comprehensive forming is a part of every cleaning and inspection at BVS and is done in every product overhaul repair.

Many other PLC manufacturers upon request

  • A2V
  • Akytec
  • Allen Bradley
  • Amit
  • AMK
  • Arbor
  • Arico
  • Artec
  • Ascon
  • Atmel
  • Augier
  • B & R / ABB
  • Baumüller
  • Beckhoff
  • Beijer
  • Berghof
  • Bimba
  • Cannon
  • CDVI
  • cmz
  • contec
  • Crouzet
  • Danfoss
  • Digitron
  • Dolt
  • DSE
  • Duelco
  • Eaton
  • Eckelmann
  • Elco
  • Emerson
  • esitron-electronic
  • Estun
  • Eurotherm
  • Fatek
  • Fiessler
  • Gefran
  • General Electric
  • Ghisalba
  • Googoltech
  • Gorgy Timing
  • GP Systems
  • Hawe
  • Hima
  • Hiquel
  • Horner
  • IDEC
  • ifm electronic
  • IMO
  • Invt
  • KEB
  • Keba
  • Kendrion
  • Klaschka
  • KML
  • Lasermet
  • Leroy
  • LSis
  • Mavili
  • MECT
  • Mitsubishi Electric
  • Omega
  • Omron
  • Palamatics
  • Panasonic
  • Picsys
  • Relectronic
  • Renu
  • Rockwell
  • Sbc
  • schmersal
  • Schneider
  • Selec
  • Serat
  • Sontheim
  • Systems
  • Tci
  • Tec automatismes
  • Teco
  • turk
  • Unitronics
  • V5Group
  • Venco
  • VIPA / Yaskawa
  • Wago
  • Werner
  • Xylem
  • Yokogawa
  • Zander Aachen

Structure and application of PLCs

Programmable logic controllers (PLCs) are essential components in automation technology and play a crucial role in controlling and monitoring industrial processes. Their purpose is to coordinate complex sequences to ensure efficient operation of machines and systems. The significance of PLC control lies in its ability to execute precise commands to automate and optimize processes, leading to increased productivity, quality, and safety.

Structure and Operation

A PLC essentially consists of a central control system, which comprises a powerful controller. This controller serves as the brain of the PLC and is connected to various sensors and actuators. Sensors capture information about the current state of a machine or process, such as temperature, pressure, or position. The captured data is analyzed by the controller, and based on this analysis, corresponding control commands are sent to the actuators. Actuators are responsible for carrying out physical actions, such as turning motors, valves, or pumps on and off.


Programming of the PLC control is done in a specialized programming language tailored to the logic and structure of automation processes. A common programming language for PLC control is, for example, the international standard IEC 61131-3. This programming language enables engineers to define logical connections, conditions, and sequences to implement the desired control operations. Programming can be done either directly on the controller or through special software that allows graphical programming.


PLC control finds diverse applications ranging from manufacturing industries to power supply and building automation. In manufacturing industries, PLC control is used to automate and optimize production processes. It enables control of conveyors, robots, assembly lines, and other production facilities. In power supply, PLC control is employed to monitor and control power grids, power plants, and renewable energy systems. In building automation, PLC control is used to regulate and optimize heating, ventilation, air conditioning, and other systems in buildings.

Modular PLC Systems

A development in PLC control is the introduction of modular PLC systems. These systems allow the distribution of control functionality into different modules that can be added or removed as needed. This enhances the flexibility and scalability of PLC control, particularly beneficial in complex applications. Modular PLC systems provide the capability to adapt control functionality to the specific requirements of a facility and enable efficient maintenance and system expansion.


Programmable logic controllers are indispensable tools in automation technology. They enable the control and monitoring of industrial processes through the use of sensors, actuators, and a powerful controller. Programming of PLC control is done in a specialized programming language, while modular PLC systems offer flexibility and scalability. With their diverse applications in manufacturing industries, power supply, and building automation, PLC controls significantly contribute to process efficiency enhancement and optimization.

Basic Equipment of a Programmable Logic Controller (PLC)

The basic equipment of a programmable logic controller (PLC) consists of various modules working together to ensure control functionality. Key modules include:

Input Process Image

This module is responsible for capturing the current state of the input signals of the PLC. Sensors and switches provide these signals, which can include information about temperatures, positions, or switch positions, for example. The input process image allows the PLC to understand the current state of monitored processes.

Output Process Image

This module is connected to the actuators and controls the output signals of the PLC. Actuators can be, for example, motors, valves, or lights. The output process image enables the PLC to generate the corresponding control signals and pass the desired actions to the process.

Arithmetic Logic Unit (ALU)

The ALU is the central element of the PLC and performs calculations and logical operations according to the program code. It interprets the entered control logic, executes the necessary operations, and generates the corresponding control signals for the actuators.

Control Unit

The control unit synchronizes and coordinates the execution of commands in the ALU. It ensures that the commands are executed in the correct order and that the necessary control signals are sent to the actuators at the right time.


The memory is an important module that contains the program code, control logic, and data during the operation of the PLC. The memory allows storing the program code and data for retrieval and updating at any time.


Flags are special memory areas used for temporary storage of data or intermediate values. They serve as variables in the control logic and can contain states, counters, or error codes, for example.

Address Registers

The address registers contain information about the memory addresses where the data and commands are stored. They enable access to specific memory areas and facilitate communication between the various modules of the PLC.


The accumulator is a register used for performing arithmetic operations. It serves as temporary storage for intermediate results and enables the execution of mathematical calculations in the ALU.

These modules constitute the basic equipment of a PLC and work together to interpret control logic, process input signals, generate output signals, and execute the desired automation process. Each module fulfills a specific function and contributes to the efficient control of machines and systems.