Many different architectures for safety related solutions are available in Schneider Electric's product offering, from safety relays to safety PLCs. The architecture can determine what SIL level or performance level can be achieved with the safety related solution. Various architectures may have inherent benefits such as simple selection or increased levels of diagnostics, but their cost effectiveness can depend on the size and complexity of the safety related system and the features and functions required.
To tie the whole safety system together, XPS safety relays are used to monitor the safety inputs, outputs, and feedback from the system to determine when the system is safe to start and when the system should be shut down.
Modular Safety Controllers—XPSMCM
Modular safety controllers are used in applications where multiple safety relays would be required to control the safety-related system, or where the interaction between the individual safety relays would require significant inter-wiring. Ethernet based communication allows you to provide status to the control system without additional I/O wiring. The simple-to-use software allows you to easily develop the safety-related control system, providing a cost effective solution.
Some machine operations may not allow gates or guards to be used, and other applications require high visibility of the process or easy accessibility. For these applications, XUSL light curtains may be the best choice and are available in many protected heights, minimum object sensitivities, and configurations.
Safety Interlock Switches—XCS
To protect operators, maintenance, and other personnel, safety systems may require the interlocking of mechanical gates or guards. We provide both locking and non-locking mechanical XCS safety interlock switches in many body styles and contact arrangements.
Non-Contact Safety Interlock Switches—XCSDM
For certain applications, such as food and beverage, no contact between the safety interlock switch and its actuating key is desired, so we provide several different types of XCSDM non-contact safety interlock switches.
Safety Limit Switches—XCS
In some applications, the position of components is important to the safety of the machine. Devices such as safety interlocks or light curtains are impractical. These applications are ideal for safety limit switches. They can also be used on gates and guards to verify a closed position or a fully open or overtravel position.
Cable Pull Switches—XY2
In most applications, emergency stopping is required to shut the machine down in case an emergency or problem arises. Where an individual emergency stop is required, the XB4/XB5 emergency stop push buttons are available in various types, sizes, and nameplates. On large machines or conveyors, a high number of emergency stop operators may need to be installed. As more individual e-stop buttons are required, using an XY2 cable pull switch becomes a more economical solution based on ease of use, installation time, and cost effectiveness.
Other products for use in safety-related systems
We offer many other products that are suitable for use in safety-related circuits, such as:
XB4/XB5 emergency stop push buttons—See Section 19, XB4–XB5 Common Operators
XV tower lights—See Section 19, XVC Tower Lights and Accessories
TeSys contactors and relays—See Section 18, Contactors and Relays
Limit switches with positive/direct opening N.C. contacts—See Section 21, Limit Switches
All of the machine safety products in this section are designed to work together to allow you to meet your various safety requirements. When properly applied, these products will allow you to meet SIL 3 per IEC 61508, Category 4 per ISO 13849-1, and performance level “e” per ISO 13849-1, and help you meet domestic and international safety requirements, standards, and codes.
The following pages give an overview of our wide offering of machine safety products. MKTED208051EN-US Rev. 02 gives a detailed description of our offering, including safety PLCs, safety controllers, safety relays, safety interlocks, light curtains, safety interlocks, non contact safety interlocks, and cable pull switches. This catalog also provides additional information on domestic and international safety standards and codes, and additional information to help you develop safety systems for the protection of personnel.