Flowserve MX-100 Field Unit - Manual (Page 9)

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MX/DDC-100 Field Unit Installation and Maintenance FCD LMENIM2329-01 – 03/11
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2.2.1 MX Actuator
The MX is a multi-turn valve actuator designed for operation of ON-OFF and modulating valve applications. This
actuator controls the opening and closing of valves. See Figure 2.1.
Features of the MX include:
Non-intrusive setup •
Separately sealed terminal chamber •
Absolute encoder for valve position sensing (no battery required) •
32-character graphical LCD display with 180° rotation •
Sophisticated electronic control, monitoring, and diagnostic capabilities with LimiGard™ technology •
2.2.2 DDC–100 Field Unit
The DDC-100 field unit is installed in the MX controls compartment. This unit permits the actuator to be controlled by
a host controller or Master Station II via the DDC-100 network. The field unit includes two high-level, surge-protected,
and isolated network communication channels, configurable digital I/O, and configuration via LCD screen. The
following commands and information may be transmitted over the DDC-100 network:
“ • OPEN,” “STOP,” and “CLOSE” commands
“ • ESD” and “MOVE–TO” position commands
Actuator status and alarm messages •
Six digital inputs and two analog inputs for user (see • Table 2.2, Register Definitions)
Two surge-protected and mutually isolated communication channels •
MX local control panel configuration •
Torque output (for reference only) and position feedback •
User’s analog input feedback •
Nine digital outputs maximum (three standard/six optional) •
Figure 2.2 – DDC-100 field unit