miniTwin Safety Light Curtain - C2MT and C4MT Series Each miniTwin stick contains both the sender and receiver elements, each symmetrically mounted in one half of a housing and separated by a central synchronization beam. The diagram shows two identical miniTwin units offset by 180° working as both sender and receiver, in a 3 pair format. Each miniTwin can be used as part of a stand-alone pair, as 2 pair or with the additional purchase of a double plug cascade cable as a cascade (3 pair) format. When cascading in 2 pair or 3 pair there are no blind spots and the miniTwin automatically configures which pair acts as the host and which as the guest. An additional cascade cable is needed for 3 pair configurations, use 701-2962 for miniTwin up to 540mm, or 701-2971 for miniTwin over 600mm, use these to replace the detachable M12 connection plug on the rear of the miniTwin with a 2 x M12 dual plug connector.