MX and QX Network Communications The MX/QX provide a comprehensive network option portfolio to the User. Network solutions are improved with the addition of HART to complement Modbus, Foundation Fieldbus H1, DeviceNet, Profibus DP_V1 and Profibus PA. MX/QX provide the User with predictable, reliable and safe operation for years to come, in applications that are subject to the most rigorous requirements and environmental extremes. DDC (Distributed Digital Control) Modbus Communication DDC is Flowserve Limitorque’s digital communication control system that provides the ability to control and monitor up to 250 actuators over a single twisted-pair cable. The communication network employs Modbus protocol on an RS-485 network and is redundant. The field unit also communicates all actuator status and alarm diagnostic messages over the same communication network. DDC Network • Single-ended loop (consult factory) • Modbus protocol • High speed – up to 19.2 k baud Foundation Fieldbus communication with Device Type Manager (DTM) technology The MX and QX can be fitted with Foundation Fieldbus protocol that complies with the IEC 61158-2 Fieldbus H1 standard. The field unit device is able to support several topologies such as point-to-point, bus with spurs, daisy chain, tree or a combination of these. Profibus DP V1 communication with DTM The MX and QX can be fitted with Profibus DP_V1 protocol field units that comply with EN50170 Fieldbus Standard for RS-485 communications. The device supports several topologies such as point-to-point, bus with spurs, daisy chain, tree or a combination of these. The DTM supports Flowserve's ValveSight diagnostic engine. Profibus PA communication with DTM A Profibus PA protocol is available and complies with EN50170 Fieldbus Standard and Fieldbus physical layer per IEC 61158-2 for communications. The device supports several topologies such as point-to-point, bus with spurs, daisy chain, tree or a combination of these. HART HART (Highway Addressable Remote Transducer) is a digital communicatio