The RS232 Isolator 1 kV in a DIN rail housing from Wiesemann & Theis provides robust protection for serial data connections. Galvanic isolation prevents potential differences from generating equalizing currents that could damage interface components or disrupt data transmission. The isolation voltage of 1 kV DC makes the device a reliable solution for industrial applications where stability and device protection are top priorities.

With active RS232 interfaces, its own power supply, and signal regeneration, the isolator ensures stable communication even over long cables or with low-power interfaces. The compact DIN rail housing is ideal for installation in industrial control cabinets.

Galvanic isolation for maximum safety

For RS232 connections over long distances, even minor voltage differences (from approx. 7 V) can cause faulty transmissions. At differences exceeding 30 V, there is a risk of irreparably damaging interface components. The RS232 isolator prevents these problems by providing galvanic isolation between the two ports, thereby protecting connected devices such as controllers, sensors, or terminals.

Integrated signal regeneration improves the quality of transmitted data, ensuring reliable communication even over long cables or in environments with high electromagnetic interference.

Interfaces and connection options

The RS232 isolator is equipped with two connectors:

• 9-pin Sub-D plug with DTE (Data Terminal Equipment) configuration
• 9-pin Sub-D socket with DCE (Data Communication Equipment) configuration

This configuration allows direct connection between devices such as PCs, controllers, or modems without additional adapters. The transparent operation ensures no settings for baud rate, parity, or other transmission parameters are required – the isolator works immediately upon connection.

Active interfaces with independent power supply

The RS232 isolator uses an external power supply (12 – 24 V AC/DC) via a pluggable screw terminal. This supply is itself galvanically isolated, increasing the protection of the entire installation. With its own energy source, the active interfaces can also reliably serve low-power devices.

The energy-saving architecture ensures that the isolator can be used in power-optimized systems.

Easy DIN rail mounting

The RS232 isolator’s housing is designed for mounting on DIN rails. This allows it to be quickly and securely integrated into industrial control cabinets. This design saves space, simplifies wiring, and keeps the cabinet neat.

Standards compliance and reliability

The RS232 isolator meets international standards:

• EN 61000-6-2 – Immunity for industrial environments
• EN 55032:2015 + A1 Class B – Emissions
• EN 61000-3-2 / EN 61000-3-3 – Electromagnetic compatibility

High EMC resistance ensures reliable operation even in environments with strong electromagnetic interference. CE and UL certifications confirm safe global use. Wiesemann & Theis offers a five-year warranty on the device.

Typical applications

• Automation technology: Protecting controllers, sensors, or terminals over long RS232 lines.
• Industrial communication: Interference-free data transfer between production machines.
• Data acquisition: Accurate measurement data recording by eliminating equalizing currents.
• Control technology: Secure connection between decentralized control stations and central controllers.

Advantages of transparent operation

The isolator’s transparent operation means that no configuration for data transmission is necessary. This saves installation time and ensures maximum compatibility with existing RS232 systems. Galvanic isolation, signal regeneration, and support for low-power interfaces make the isolator a particularly reliable solution.

Robust protection for RS232 connections

The RS232 Isolator 1 kV from Wiesemann & Theis combines safety, ease of use, and industrial durability. With galvanic isolation, active interfaces, signal regeneration, and DIN rail mounting, it is the perfect choice for all applications requiring secure and stable RS232 communication – from control cabinets to production lines.