This Harmony ZB, dummy contact block uses PCB terminals. This contact block is designed as a dummy contact block housing without pins. It is easily installed and connected to Harmony XB4 and XB5 transformer block for light block with integral LED with simple PCB connections. It protects operators from unexpected contact with live circuits thanks to its IP20 protection index. 1 million cycle high endurance under 6A load allows less maintenance and damage in your installation. It has clear color scheme for NO and NC contact block types. Its wide range of operating temperatures from -40°C to 70°C allows versatility in usage of product.