It is a common misconception that safety and cost-effectiveness in automation technology are conflicting aims. However, in reality, it is only possible to achieve the one if the other is met first. This is because a safe plant is generally a more efficient one. Safety solutions provider since 2011, We offer pilz safety relays myPNOZ, safety sensor PSENslock, light curtains, PLC, safety gate, HMI, switches and more.
Therefore, when aiming to maximize safety, it is primarily a need to assess only the additional outlay that causes increased safety. Although the cost of families of safety components can be higher than that of standard control components, this is somewhat offset because safety-related parts of control systems are not subject to the same degree of wear as non-safety related parts of the same function. An example of this is a main contactor compared with a safety contactor; the control reliability of a safety function that uses a safety contactor can be determined in terms of its safety performance level, based on the probability of dangerous failure per hour. http://www.pilz.com
In such a case, a safety contactor would often outperform the main contactor, but an assessment would find the cost over a given time to be similar. High safety performance level architecture is often based on redundancy and/or dual channel technology to provide maximum fault detection within the system, and this type of design can be very costly. The launch of PNOZsigma safety relays was driven by the need to provide a cost-effective safety-related solution, with no compromise on safety and still targeting those that are looking to replace existing relay technology at a lower price to achieve the same performance level with a modern alternative. http://www.pilz.com