Safety relay for signal processing for machine safety

Details: Released: 28.09.2022; Last updated: 19.04.2023; Hits: 7780

For safe signal processing to monitor a machine, the Schmersal group various type-tested solutions, including a variety of Safety relay, safety controllers and Standstill monitor. are new to the program two safety components: the SRB-E-302ST relay and the SRB-E-402EM output expander. These and other new components of the Safety Technology can be found below:

Contents

New evaluation logics on safety relays
Safety relays and output expansions that save space
Safety relay modules with explosion protection that is valid worldwide

New evaluation logics on safety relays

20.09.2022/2022/XNUMX | Schmersal is presenting new variants of its multifunctional safety relays at the SPS XNUMX Series SRB-E. These product lines come together with the compact safety controller ProtectSelect for a high level of security, which is easy to use and highly flexible. This makes the products very suitable for elevators in wind turbines.

These are subject to changes in the Standard EN 81-44 new safety requirements that are being met. An important innovation requires that safety-related parts of the control must now comply with PL d according to EN ISO 13849-1. This safety level can be easily achieved with the safety relays and the controller.

If you combine the SRB-E and Protect Select with position switches and other safety components from Schmersal, safety functions such as monitoring elevator doors can be integrated Wind Turbines, overload protection, direction monitoring and end stop.

Schmersal is exhibiting at the SPS 2022.

Safety relays and output expansions that save space

29.11.2021/XNUMX/XNUMX | Schmersal launches two new safety modules: the safety relay SRB-E-302ST and the exit expansion SRB-E-402EM. Both are efficient and space-saving solutions for that safe signal evaluation.

One evaluation unit for two safety sensors is the distinctive feature of the SRB-E-302ST safety relay module. With this safety relay, the provider of safety switching devices, relays, controls and other safety technology is replacing several components from the older AES series. It monitors all common electromechanical and electronic safety switching devices and safety sensors. It can also be used to monitor optoelectronic protective devices (AOPDs). Depending on the application, the safety relay switches with the safe relay contacts or wear-free with a safe semiconductor output. Applications up to category 4/ PL e (EN ISO 13849-1) and SIL 3 (IEC 61508) can be implemented.

Safety control for safe signal processing

This is how the electrical designer saves Place in switch cabinet and costs. He can use the full functionality of a modern safety relay twice. Control is possible via one or two channels. Safety functions such as stop 0, autostart and reset with edge monitoring are integrated. A rotary switch can be used to select 24 preconfigured applications. The operator selects the start function with a second rotary switch.

Like the safety relay SRB-E-402ST, the new output extension SRB-E-302EM is housed in the modern and compact housing of the Safety SRB-E series. The designer can use it to duplicate and reinforce contacts from safe relays and semiconductor outputs. Four safety contacts, two signaling contacts and feedback contacts are available. The new safety relay is as Expansion module Can be used for all safety modules and safety controls that have feedback loop monitoring. Compared to the previous series, the new safety technology is more compact and can withstand an increased temperature range of -25 ° to +60 ° C.

Safety relay with worldwide explosion protection

01.07.2015/XNUMX/XNUMX | The safety relay modules SRB Exi from Schmersal are suitable for the safe signal evaluation of emergency stop devices and for monitoring protective doors. So far, they have been approved on the basis of the Atex directive 94/9 EC, which is valid in Europe, and have been successfully asserting themselves on the market for several years. Now they also meet the requirements of explosion protection not only in Europe but also worldwide.

In order to enable the worldwide use of the SRB series, the automation specialist successfully created the Iecex approval requested. The International Electrotechnical Commission, which awards Iecex approval, has set itself the goal of worldwide harmonization of explosion protection. The company has also obtained Inmetro approval specifically for the Brazilian and South American markets (National Institute of Metrology, Standardization and Industrial Quality, Brazil).

Air circuit breaker, digital protection relay and soft starter

The two new approvals offer users tangible advantages: When marketing their machines and systems worldwide, manufacturers must also have them recognized by the local testing organizations in the respective country. The Iecex and Inmetro approvals simplify this process considerably and enable machine manufacturers to additional market potential to develop.