Flowserve MX HART Field Unit - Manual (Page 9)

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14
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2
System Components
and Installation
2.1 Introduction
This section is an overview of the components used in the HART system and their installation. The MX/QX HART unit is
installed in the MX or QX actuator, as shown in Figures 2.1 and 2.2. The network cable connects to the HART unit at the
actuator terminal block. The network cable connects to the distributed control system, which usually acts as the host.
2.2 Hardware
2.2.1 MX/QX Electronic Actuators
The MX/QX actuators control the opening and closing of valves. The MX is a multi-turn valve, while the QX is a quarter-
turn valve actuator. Both actuators are designed for operation of ON-OFF and modulating valve applications.
The MX/QX features include the following:
• Non-intrusive setup
• Separately sealed terminal compartment
• Patented absolute encoder for valve position sensing (no battery required)
• Graphical LCD for indication and calibration
• Sophisticated electronic control, monitoring, and diagnostic capabilities with patented LimiGard™ technology
NOTE: Recommended storage procedures for the MX are detailed in Bulletin LMENIM2306, MX Maintenance and
Spare Parts Manual. QX procedures are detailed in Bulletin LMENIM3306, QX Maintenance and Spare Parts Manual.
Failure to comply with recommended procedures will void the warranty. For longer-term storage, contact Limitorque for
procedure and recommendations.