Serial communication
Serial communication (RS-232, RS-422, RS-485) is the backbone of many OT systems where simple point-to-point or multidrop data transfer is sufficient.
The standards offer different benefits depending on needs:
- RS-232 Typically used for short distances (up to approx. 15 m), ideal for direct connection between one sensor or PLC and a PC
- RS-422 and RS-485 Supports longer distance and multi-device setups - RS-485, for example, allows up to 32 devices on the same bus over hundreds of meters and is tolerant to electrical noise
Areas of application
Suitable for connecting older machines and modular systems that only have serial interfaces to modern OT infrastructure.
For setup as a standalone control connection - e.g. between PLC and motor controller or HMI panel.
In multi-unit installations where the RS-485 bus is used to connect multiple sensors or actuators over longer distances.
Media converters in serial communication
Serial to serial devices
Converts the signal type between RS standards (e.g. RS 232 to RS 485) and resolves compatibility issues
Serial to fiber converters
Enables longer transport distances and immunity to electromagnetic interference - ideal for industrial environments
These technologies ensure robust and cost-effective connectivity in environments with both legacy and new OT devices, and can be easily integrated into existing infrastructures without advanced setup.