2 x Siemens BACnet TECs model 550-490PA
2 x Siemens BACnet TEC model 550-490PA BACnet extended I/O module, programmable type. Can be set up for extra BO’s, BI’s, AI’s or 3 x AO’s Brand new device, 1 x not in original box. 1 x in original box. For uses see datasheet at https://bacnetinternational.net/catalog/manu/siemens/550-491.PDF