This expansion module from Pilz, model 751110, is a reliable and high-quality safety relay that is perfect for your industrial equipment. With a 24VAC coil voltage, this module is designed to provide optimal safety and protection for your machinery. It has 4 normally open and 1 normally closed contacts, which are perfect for a variety of applications. It is an excellent choice for those who want to ensure the safety of their workers and equipment. This Pilz expansion module has been designed to meet the highest safety standards and is sure to provide you with peace of mind. It is the perfect addition to any industrial setup and is sure to provide you with years of reliable service.