You can reliably implement safety functions in machines and systems using safety relay modules.
They monitor signals from emergency stop buttons, light grids, and safety door switches, and initiate a safe state where necessary.
The PSR product range comprises safety relays with fixed or configurable safety functions, zero-speed and over-speed safety relays, and safe coupling relays.
With a non-safe switching relay, the metal contacts can weld together after multiple switching cycles.
If the machine operator presses the emergency stop button in this case, the machine will not stop.
This results in a non-safe state, that can harm the operator or damage the machine.
The relays installed in the safety relay module are based on relay technology with force-guided contacts in accordance with EN 50205, and they reliably monitor functions in machines and systems. Thanks to redundant structures, a safe state is always ensured for the machine operator.
Use Safety relay modules certified in accordance with the relevant safety standards and norms instead.
Safety relay modules are ideal if a machine or system requires few safety functions and logic operations to be implemented, such as in the following examples:
In a safety relay module with integrated monitoring, the forced guidance property is used for fault detection.
This ensures that serious faults, such as contact welding, are reliably detected and a high safety level is achieved.
– How does it work?
The N/O and N/C contacts of an elementary relay are connected to one another mechanically through forced guidance. This prevents N/O and N/C contacts from closing at the same time. In conjunction with a suitable circuit, failure to open can be reliably detected. This is the most reliable way to ensure maximum safety for both people and machinery.
All safety relay modules from Phoenix Contact are TÜV-certified in accordance with EN ISO 13849 up to performance level e or IEC 61508 up to SIL 3.
The safety relay module is a subsystem that forms the logic part of a safety function, and must therefore correspond to the new safety requirements. As part of the certification process, the following features of the switching devices are checked, evaluated, and validated, among others:
Our safety product portfolio includes non-contact safety switches, safety relay modules, and I/Os to safe controllers. All Phoenix Contact safety components are SIL-certified and feature impressively easy handling.
