News
Indian approval for the PLC-based Failsafe Network Multiplexer from Deltron and Pilz - One platform for all signalling tasks
arrow_backTo the overview26 August 2025 | Pilz Skandinavien
In future, the Failsafe Network Multiplexer (FNmux) from the Indian signalling technology manufacturer Deltron will be able to control automatic line blocks in India. The SIL 4 platform solution, based on the safe, modular railway control system PSSrail from the automation expert Pilz monitors interlockings, level crossings and signals. FNmux now has the necessary railway approval and is making a decisive contribution to the digitisation of the Indian railway infrastructure.
FNmux is the result of a long-term collaboration between Deltron and the automation expert Pilz. In March, FNmux was officially approved by the Indian supervisory authority "Research Design and Standards Organisation" (RDSO).
A safe package
The SIL 4-capable signalling solution FNmux combines safety and control intelligence to monitor level crossings, interlockings and signals in automatic line blocks in a particularly cost-effective manner. The multiplex method is used, i.e. several signals are transferred simultaneously via optical fibre. FNmux thus enables technology openness, which is a crucial requirement in the rapidly growing Indian infrastructure. The innovation lies in the solution's modularity: via the inputs and outputs of the railway control system PSSrail, the solution can be adapted flexibly to a variety of applications in the extensive Indian Railways network, and is easily configured. With its real-time response, redundancy and reliability, PSSrail offers additional strengths when used at Deltron.
Future-proof railway control system
With this jointly developed solution, Deltron and Pilz are laying an important foundation for the digitisation of India's railway infrastructure. FNmux can be connected to other components across a range of manufacturers and is therefore equipped for digitisation tasks.
This article is written by:
Pilz Skandinavien
We are shaping the future of industrial automation
Pilz is a global supplier of automation components, systems and services. We never compromise when it comes to safety for human, machine and the environment. As a family business steeped in tradition, with a worldwide presence, our aim is to be a reliable partner for you locally.
Our guiding principle – The spirit of safety
In everything we do, we want to make the world a safer place. This is apparent in each product and solution from Pilz that considers both machinery safety and security requirements. We always focus on our customers