Siemens XTRI-R Single Input Module (with relay)The Siemens XTRI R is an intelligent single input interface module with an addressable Form C relay, letting you monitor a dry contact and control a relay at the same address. It features ISOtechnology dual isolation for NFPA 72 Class X (Style 7) survivability, a tri color status LED, and configurable wiring: isolator mode or polarity insensitive wiring in non isolator mode using SureWire. The relay and the input can be controlled as separate